nc_remove_unittests.cc 79.2 KB
Newer Older
1
// Copyright (C) 2013-2015 Internet Systems Consortium, Inc. ("ISC")
2 3 4 5 6 7 8 9 10 11 12 13 14
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

15 16
#include <config.h>

17
#include <asiolink/io_service.h>
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
#include <d2/d2_cfg_mgr.h>
#include <d2/d2_cfg_mgr.h>
#include <d2/nc_remove.h>
#include <dns/messagerenderer.h>
#include <nc_test_utils.h>

#include <boost/function.hpp>
#include <boost/bind.hpp>
#include <gtest/gtest.h>

using namespace std;
using namespace isc;
using namespace isc::d2;

namespace {

/// @brief Test class derived from NameRemoveTransaction to provide visiblity
// to protected methods.
class NameRemoveStub : public NameRemoveTransaction {
public:
38
    NameRemoveStub(asiolink::IOServicePtr& io_service,
39 40
                   dhcp_ddns::NameChangeRequestPtr& ncr,
                   DdnsDomainPtr& forward_domain,
41 42
                   DdnsDomainPtr& reverse_domain,
                   D2CfgMgrPtr& cfg_mgr)
43
        : NameRemoveTransaction(io_service, ncr, forward_domain,
44
                                reverse_domain, cfg_mgr),
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
          simulate_send_exception_(false),
          simulate_build_request_exception_(false) {
    }

    virtual ~NameRemoveStub() {
    }

    /// @brief Simulates sending update requests to the DNS server
    ///
    /// This method simulates the initiation of an asynchronous send of
    /// a DNS update request. It overrides the actual sendUpdate method in
    /// the base class, thus avoiding an actual send, yet still increments
    /// the update attempt count and posts a next event of NOP_EVT.
    ///
    /// It will also simulate an exception-based failure of sendUpdate, if
    /// the simulate_send_exception_ flag is true.
    ///
62
    /// @param comment Parameter is unused, but present in base class method
63
    ///
64
    virtual void sendUpdate(const std::string& /* comment */) {
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
        if (simulate_send_exception_) {
            // Make the flag a one-shot by resetting it.
            simulate_send_exception_ = false;
            // Transition to failed.
            transition(PROCESS_TRANS_FAILED_ST, UPDATE_FAILED_EVT);
            return;
        }

        // Update send attempt count and post a NOP_EVT.
        setUpdateAttempts(getUpdateAttempts() + 1);
        postNextEvent(StateModel::NOP_EVT);
    }

    /// @brief Prepares the initial D2UpdateMessage
    ///
    /// This method overrides the NameChangeTransactio implementation to
    /// provide the ability to simulate an exception throw in the build
    /// request logic.
    /// If the one-shot flag, simulate_build_request_exception_ is true,
    /// this method will throw an exception, otherwise it will invoke the
    /// base class method, providing normal functionality.
    ///
    /// For parameter description see the NameChangeTransaction implementation.
    virtual D2UpdateMessagePtr prepNewRequest(DdnsDomainPtr domain) {
        if (simulate_build_request_exception_) {
            simulate_build_request_exception_ = false;
            isc_throw (NameRemoveTransactionError,
                       "Simulated build requests exception");
        }

        return (NameChangeTransaction::prepNewRequest(domain));
    }

    /// @brief Simulates receiving a response
    ///
    /// This method simulates the completion of a DNSClient send.  This allows
    /// the state handler logic devoted to dealing with IO completion to be
Thomas Markwalder's avatar
Thomas Markwalder committed
102
    /// fully exercised without requiring any actual IO.  The two primary
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
    /// pieces of information gleaned from IO completion are the DNSClient
    /// status which indicates whether or not the IO exchange was successful
    /// and the rcode, which indicates the server's reaction to the request.
    ///
    /// This method updates the transaction's DNS status value to that of the
    /// given parameter, and then constructs and DNS update response message
    /// with the given rcode value.  To complete the simulation it then posts
    /// a next event of IO_COMPLETED_EVT.
    ///
    /// @param status simulated DNSClient status
    /// @param rcode  simulated server response code
    void fakeResponse(const DNSClient::Status& status,
                      const dns::Rcode& rcode) {
        // Set the DNS update status.  This is normally set in
        // DNSClient IO completion handler.
        setDnsUpdateStatus(status);

        // Construct an empty message with the given Rcode.
        D2UpdateMessagePtr msg(new D2UpdateMessage(D2UpdateMessage::OUTBOUND));
        msg->setRcode(rcode);

        // Set the update response to the message.
        setDnsUpdateResponse(msg);

        // Post the IO completion event.
        postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);
    }

    /// @brief Selects the first forward server.
    /// Some state handlers require a server to have been selected.
    /// This selects a server without going through the state
    /// transition(s) to do so.
    bool selectFwdServer() {
        if (getForwardDomain()) {
            initServerSelection(getForwardDomain());
            selectNextServer();
            return (getCurrentServer());
        }

        return (false);
    }

    /// @brief Selects the first reverse server.
    /// Some state handlers require a server to have been selected.
    /// This selects a server without going through the state
    /// transition(s) to do so.
    bool selectRevServer() {
        if (getReverseDomain()) {
            initServerSelection(getReverseDomain());
            selectNextServer();
            return (getCurrentServer());
        }

        return (false);
    }

    /// @brief One-shot flag which will simulate sendUpdate failure if true.
    bool simulate_send_exception_;

    /// @brief One-shot flag which will simulate an exception when sendUpdate
    /// failure if true.
    bool simulate_build_request_exception_;

    using StateModel::postNextEvent;
    using StateModel::setState;
    using StateModel::initDictionaries;
    using NameRemoveTransaction::defineEvents;
    using NameRemoveTransaction::verifyEvents;
    using NameRemoveTransaction::defineStates;
    using NameRemoveTransaction::verifyStates;
    using NameRemoveTransaction::readyHandler;
    using NameRemoveTransaction::selectingFwdServerHandler;
    using NameRemoveTransaction::getCurrentServer;
    using NameRemoveTransaction::removingFwdAddrsHandler;
    using NameRemoveTransaction::setDnsUpdateStatus;
    using NameRemoveTransaction::removingFwdRRsHandler;
    using NameRemoveTransaction::selectingRevServerHandler;
    using NameRemoveTransaction::removingRevPtrsHandler;
    using NameRemoveTransaction::processRemoveOkHandler;
    using NameRemoveTransaction::processRemoveFailedHandler;
    using NameRemoveTransaction::buildRemoveFwdAddressRequest;
    using NameRemoveTransaction::buildRemoveFwdRRsRequest;
    using NameRemoveTransaction::buildRemoveRevPtrsRequest;
};

typedef boost::shared_ptr<NameRemoveStub> NameRemoveStubPtr;

/// @brief Test fixture for testing NameRemoveTransaction
///
/// Note this class uses NameRemoveStub class to exercise non-public
/// aspects of NameRemoveTransaction.
class NameRemoveTransactionTest : public TransactionTest {
public:
    NameRemoveTransactionTest() {
    }

    virtual ~NameRemoveTransactionTest() {
    }

    /// @brief Creates a transaction which requests an IPv4 DNS update.
    ///
    /// The transaction is constructed around a predefined (i.e. "canned")
    /// IPv4 NameChangeRequest. The request has both forward and reverse DNS
    /// changes requested.  Based upon the change mask, the transaction
    /// will have either the forward, reverse, or both domains populated.
    ///
    /// @param change_mask determines which change directions are requested
    NameRemoveStubPtr makeTransaction4(int change_mask) {
        // Creates IPv4 remove request, forward, and reverse domains.
        setupForIPv4Transaction(dhcp_ddns::CHG_REMOVE, change_mask);

        // Now create the test transaction as would occur in update manager.
        return (NameRemoveStubPtr(new NameRemoveStub(io_service_, ncr_,
                                                     forward_domain_,
217 218
                                                     reverse_domain_,
                                                     cfg_mgr_)));
219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235
    }

    /// @brief Creates a transaction which requests an IPv6 DNS update.
    ///
    /// The transaction is constructed around a predefined (i.e. "canned")
    /// IPv6 NameChangeRequest. The request has both forward and reverse DNS
    /// changes requested.  Based upon the change mask, the transaction
    /// will have either the forward, reverse, or both domains populated.
    ///
    /// @param change_mask determines which change directions are requested
    NameRemoveStubPtr makeTransaction6(int change_mask) {
        // Creates IPv6 remove request, forward, and reverse domains.
        setupForIPv6Transaction(dhcp_ddns::CHG_REMOVE, change_mask);

        // Now create the test transaction as would occur in update manager.
        return (NameRemoveStubPtr(new NameRemoveStub(io_service_, ncr_,
                                                     forward_domain_,
236 237
                                                     reverse_domain_,
                                                     cfg_mgr_)));
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252
    }

    /// @brief Create a test transaction at a known point in the state model.
    ///
    /// Method prepares a new test transaction and sets its state and next
    /// event values to those given.  This makes the transaction appear to
    /// be at that point in the state model without having to transition it
    /// through prerequisite states.   It also provides the ability to set
    /// which change directions are requested: forward change only, reverse
    /// change only, or both.
    ///
    /// @param state value to set as the current state
    /// @param event value to post as the next event
    /// @param change_mask determines which change directions are requested
    /// @param family selects between an IPv4 (AF_INET) and IPv6 (AF_INET6)
253
    /// transaction.
254
    NameRemoveStubPtr prepHandlerTest(unsigned int state, unsigned int event,
255 256
                                      unsigned int change_mask
                                      = FWD_AND_REV_CHG,
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273
                                      short family = AF_INET) {
        NameRemoveStubPtr name_remove = (family == AF_INET ?
                                         makeTransaction4(change_mask) :
                                         makeTransaction6(change_mask));
        name_remove->initDictionaries();
        name_remove->postNextEvent(event);
        name_remove->setState(state);
        return (name_remove);
    }

};

/// @brief Tests NameRemoveTransaction construction.
/// This test verifies that:
/// 1. Construction with invalid type of request
/// 2. Valid construction functions properly
TEST(NameRemoveTransaction, construction) {
274
    asiolink::IOServicePtr io_service(new isc::asiolink::IOService());
275
    D2CfgMgrPtr cfg_mgr(new D2CfgMgr());
276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295

    const char* msg_str =
        "{"
        " \"change_type\" : 0 , "
        " \"forward_change\" : true , "
        " \"reverse_change\" : true , "
        " \"fqdn\" : \"example.com.\" , "
        " \"ip_address\" : \"192.168.2.1\" , "
        " \"dhcid\" : \"0102030405060708\" , "
        " \"lease_expires_on\" : \"20130121132405\" , "
        " \"lease_length\" : 1300 "
        "}";

    dhcp_ddns::NameChangeRequestPtr ncr;
    DnsServerInfoStoragePtr servers;
    DdnsDomainPtr forward_domain;
    DdnsDomainPtr reverse_domain;
    DdnsDomainPtr empty_domain;

    ASSERT_NO_THROW(ncr = dhcp_ddns::NameChangeRequest::fromJSON(msg_str));
296 297
    ASSERT_NO_THROW(forward_domain.reset(new DdnsDomain("*", servers)));
    ASSERT_NO_THROW(reverse_domain.reset(new DdnsDomain("*", servers)));
298 299 300

    // Verify that construction with wrong change type fails.
    EXPECT_THROW(NameRemoveTransaction(io_service, ncr,
301
                                       forward_domain, reverse_domain, cfg_mgr),
Thomas Markwalder's avatar
Thomas Markwalder committed
302
                                       NameRemoveTransactionError);
303 304 305 306

    // Verify that a valid construction attempt works.
    ncr->setChangeType(isc::dhcp_ddns::CHG_REMOVE);
    EXPECT_NO_THROW(NameRemoveTransaction(io_service, ncr,
307 308
                                          forward_domain, reverse_domain,
                                          cfg_mgr));
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329
}

/// @brief Tests event and state dictionary construction and verification.
TEST_F(NameRemoveTransactionTest, dictionaryCheck) {
    NameRemoveStubPtr name_remove;
    ASSERT_NO_THROW(name_remove = makeTransaction4(FWD_AND_REV_CHG));
    // Verify that the event and state dictionary validation fails prior
    // dictionary construction.
    ASSERT_THROW(name_remove->verifyEvents(), StateModelError);
    ASSERT_THROW(name_remove->verifyStates(), StateModelError);

    // Construct both dictionaries.
    ASSERT_NO_THROW(name_remove->defineEvents());
    ASSERT_NO_THROW(name_remove->defineStates());

    // Verify both event and state dictionaries now pass validation.
    ASSERT_NO_THROW(name_remove->verifyEvents());
    ASSERT_NO_THROW(name_remove->verifyStates());
}


330 331 332
/// @brief Tests construction of a DNS update request for removing forward
/// DNS address RRs.
TEST_F(NameRemoveTransactionTest, buildRemoveFwdAddressRequest) {
333 334 335 336
    // Create a IPv4 forward add transaction.
    // Verify the request builds without error.
    // and then verify the request contents.
    NameRemoveStubPtr name_remove;
337 338 339
    ASSERT_NO_THROW(name_remove = makeTransaction4(FORWARD_CHG));
    ASSERT_NO_THROW(name_remove->buildRemoveFwdAddressRequest());
    checkRemoveFwdAddressRequest(*name_remove);
340 341 342 343

    // Create a IPv6 forward add transaction.
    // Verify the request builds without error.
    // and then verify the request contents.
344 345 346
    ASSERT_NO_THROW(name_remove = makeTransaction6(FORWARD_CHG));
    ASSERT_NO_THROW(name_remove->buildRemoveFwdAddressRequest());
    checkRemoveFwdAddressRequest(*name_remove);
347 348
}

349 350 351
/// @brief Tests construction of a DNS update request for removing forward
/// dns RR entries.
TEST_F(NameRemoveTransactionTest, buildRemoveFwdRRsRequest) {
352 353 354 355
    // Create a IPv4 forward replace transaction.
    // Verify the request builds without error.
    // and then verify the request contents.
    NameRemoveStubPtr name_remove;
356 357 358
    ASSERT_NO_THROW(name_remove = makeTransaction4(FORWARD_CHG));
    ASSERT_NO_THROW(name_remove->buildRemoveFwdRRsRequest());
    checkRemoveFwdRRsRequest(*name_remove);
359 360 361 362

    // Create a IPv6 forward replace transaction.
    // Verify the request builds without error.
    // and then verify the request contents.
363 364 365
    ASSERT_NO_THROW(name_remove = makeTransaction6(FORWARD_CHG));
    ASSERT_NO_THROW(name_remove->buildRemoveFwdRRsRequest());
    checkRemoveFwdRRsRequest(*name_remove);
366 367
}

368
/// @brief Tests the construction of a DNS update request for removing a
369
/// reverse dns entry.
370
TEST_F(NameRemoveTransactionTest, buildRemoveRevPtrsRequest) {
371 372 373 374
    // Create a IPv4 reverse replace transaction.
    // Verify the request builds without error.
    // and then verify the request contents.
    NameRemoveStubPtr name_remove;
375 376 377
    ASSERT_NO_THROW(name_remove = makeTransaction4(REVERSE_CHG));
    ASSERT_NO_THROW(name_remove->buildRemoveRevPtrsRequest());
    checkRemoveRevPtrsRequest(*name_remove);
378 379 380 381

    // Create a IPv6 reverse replace transaction.
    // Verify the request builds without error.
    // and then verify the request contents.
382 383 384
    ASSERT_NO_THROW(name_remove = makeTransaction6(REVERSE_CHG));
    ASSERT_NO_THROW(name_remove->buildRemoveRevPtrsRequest());
    checkRemoveRevPtrsRequest(*name_remove);
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563
}

// Tests the readyHandler functionality.
// It verifies behavior for the following scenarios:
//
// 1. Posted event is START_EVT and request includes only a forward change
// 2. Posted event is START_EVT and request includes both a forward and a
// reverse change
// 3. Posted event is START_EVT and request includes only a reverse change
// 4. Posted event is invalid
//
TEST_F(NameRemoveTransactionTest, readyHandler) {
    NameRemoveStubPtr name_remove;

    // Create a transaction which includes only a forward change.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::READY_ST,
                                    StateModel::START_EVT, FORWARD_CHG));
    // Run readyHandler.
    EXPECT_NO_THROW(name_remove->readyHandler());

    // Verify that a request requiring only a forward change, transitions to
    // selecting a forward server.
    EXPECT_EQ(NameChangeTransaction::SELECTING_FWD_SERVER_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::SELECT_SERVER_EVT,
              name_remove->getNextEvent());

    // Create a transaction which includes both a forward and a reverse change.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::READY_ST,
                                    StateModel::START_EVT, FWD_AND_REV_CHG));
    // Run readyHandler.
    EXPECT_NO_THROW(name_remove->readyHandler());

    // Verify that a request requiring both forward and reverse, starts with
    // the forward change by transitioning to selecting a forward server.
    EXPECT_EQ(NameChangeTransaction::SELECTING_FWD_SERVER_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::SELECT_SERVER_EVT,
              name_remove->getNextEvent());

    // Create and prep a reverse only transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::READY_ST,
                                    StateModel::START_EVT, REVERSE_CHG));
    // Run readyHandler.
    EXPECT_NO_THROW(name_remove->readyHandler());

    // Verify that a request requiring only a reverse change, transitions to
    // selecting a reverse server.
    EXPECT_EQ(NameChangeTransaction::SELECTING_REV_SERVER_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::SELECT_SERVER_EVT,
              name_remove->getNextEvent());

    // Create and prep transaction, poised to run the handler but with an
    // invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::READY_ST,
                                    StateModel::NOP_EVT));

    // Running the readyHandler should throw.
    EXPECT_THROW(name_remove->readyHandler(), NameRemoveTransactionError);
}


// Tests the selectingFwdServerHandler functionality.
// It verifies behavior for the following scenarios:
//
// 1. Posted event is SELECT_SERVER_EVT
// 2. Posted event is SERVER_IO_ERROR_EVT
// 3. Posted event is invalid
//
TEST_F(NameRemoveTransactionTest, selectingFwdServerHandler) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    SELECTING_FWD_SERVER_ST,
                                    NameChangeTransaction::SELECT_SERVER_EVT));

    // Call selectingFwdServerHandler enough times to select all of the
    // servers in it's current domain.  The first time, it will be with
    // next event of SELECT_SERVER_EVT.  Thereafter it will be with a next
    // event of SERVER_IO_ERROR_EVT.
    int num_servers = name_remove->getForwardDomain()->getServers()->size();
    for (int i = 0; i < num_servers; ++i) {
        // Run selectingFwdServerHandler.
        ASSERT_NO_THROW(name_remove->selectingFwdServerHandler())
                        << " num_servers: " << num_servers
                        << " selections: " << i;

        // Verify that a server was selected.
        ASSERT_TRUE(name_remove->getCurrentServer())
                    << " num_servers: " << num_servers << " selections: " << i;

        // Verify that we transitioned correctly.
        ASSERT_EQ(NameRemoveTransaction::REMOVING_FWD_ADDRS_ST,
                  name_remove->getCurrState())
                  << " num_servers: " << num_servers << " selections: " << i;
        ASSERT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                  name_remove->getNextEvent())
                  << " num_servers: " << num_servers << " selections: " << i;

        // Post a server IO error event.  This simulates an IO error occuring
        // and a need to select the new server.
        ASSERT_NO_THROW(name_remove->postNextEvent(NameChangeTransaction::
                                                   SERVER_IO_ERROR_EVT))
                        << " num_servers: " << num_servers
                        << " selections: " << i;
    }

    // We should have exhausted the list of servers. Processing another
    // SERVER_IO_ERROR_EVT should transition us to failure.
    EXPECT_NO_THROW(name_remove->selectingFwdServerHandler());
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::NO_MORE_SERVERS_EVT,
              name_remove->getNextEvent());

    // Create and prep transaction, poised to run the handler but with an
    // invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    SELECTING_FWD_SERVER_ST,
                                    StateModel::NOP_EVT));

    // Running the handler should throw.
    EXPECT_THROW(name_remove->selectingFwdServerHandler(),
                 NameRemoveTransactionError);
}

// ************************ addingFwdAddrHandler Tests *****************

// Tests that removingFwdAddrsHandler rejects invalid events.
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_InvalidEvent) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler but with
    // an invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    StateModel::NOP_EVT));

    // Running the handler should throw.
    EXPECT_THROW(name_remove->removingFwdAddrsHandler(),
                 NameRemoveTransactionError);
}


// Tests addingFwdAddrsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
//  A server response is received which indicates successful update
//
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_FwdOnlyOK) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    // Should not be an update message yet.
    D2UpdateMessagePtr update_msg = name_remove->getDnsUpdateRequest();
    ASSERT_FALSE(update_msg);

    // At this point completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Run removingFwdAddrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Verify that an update message was constructed properly.
564
    checkRemoveFwdAddressRequest(*name_remove);
565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611

    // Verify that we are still in this state and next event is NOP_EVT.
    // This indicates we "sent" the message and are waiting for IO completion.
    EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_ADDRS_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::NOP_EVT,
              name_remove->getNextEvent());

    // Simulate receiving a successful update response.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NOERROR());

    // Run removingFwdAddrsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Completion flags should both still be false, as we are only partly
    // done with forward updates.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since we succeeded, we should now attempt to remove any remaining
    // forward RRs.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_RRS_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameRemoveTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}

// Tests addingFwdAddrsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
//  A server response is received which indicates FQDN is not in use.
//
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_FqdnNotInUse) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    // Run removingFwdAddrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

612 613
    // Simulate receiving a RRSET does not exist.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXRRSET());
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656

    // Run removingFwdAddrsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Completion flags should both still be false, as we are only partly
    // done with forward updates.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // There was no address RR to remove, but we will still make sure there
    // are no other RRs for this FQDN.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_RRS_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameRemoveTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}


// Tests removingFwdAddrsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
//  A server response is received which indicates the update was rejected.
//
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_OtherRcode) {
    NameRemoveStubPtr name_remove;

    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectFwdServer());

    // Run removingFwdAddrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Simulate receiving server rejection response. Per RFC, anything other
657
    // than no error or FQDN not in use is failure. Arbitrarily choosing
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
    // refused.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::REFUSED());

    // Run removingFwdAddrsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Completion flags should still be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // We should have failed the transaction. Verify that we transitioned
    // correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}


// Tests removingFwdAddrsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request send times out MAX_UPDATE_TRIES_PER_SERVER times.
//
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_Timeout) {
    NameRemoveStubPtr name_remove;

    // Create and prep a transaction, poised to run the handler.
    // The log message issued when this test succeeds, displays the
    // selected server, so we need to select a server before running this
    // test.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectFwdServer());

    // Verify that we can make maximum number of update attempts permitted
    // and then transition to selecting a new server.
    int max_tries = NameChangeTransaction::MAX_UPDATE_TRIES_PER_SERVER;
    for (int i = 1; i <= max_tries; ++i) {
        const D2UpdateMessagePtr prev_msg = name_remove->getDnsUpdateRequest();

        // Run removingFwdAddrsHandler to send the request.
        EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

        const D2UpdateMessagePtr curr_msg = name_remove->getDnsUpdateRequest();
        if (i == 1) {
            // First time around we should build the message.
            EXPECT_FALSE(prev_msg);
            EXPECT_TRUE(curr_msg);
        } else {
            // Subsequent passes should reuse the request. We are only
            // looking to check that we have not replaced the pointer value
            // with a new pointer.  This tests the on_entry() logic which
            // clears the request ONLY upon initial entry into the state.
            EXPECT_TRUE(prev_msg == curr_msg);
        }

        // Simulate a server IO timeout.
        name_remove->setDnsUpdateStatus(DNSClient::TIMEOUT);
        name_remove->postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);

        // Run removingFwdAddrsHandler again to process the response.
        EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

        // Completion flags should be false.
        EXPECT_FALSE(name_remove->getForwardChangeCompleted());
        EXPECT_FALSE(name_remove->getReverseChangeCompleted());

        if (i < max_tries) {
            // We should be ready to try again.
            EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_ADDRS_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                    name_remove->getNextEvent());
        } else {
            // Server retries should be exhausted, time for a new server.
            EXPECT_EQ(NameRemoveTransaction::SELECTING_FWD_SERVER_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_IO_ERROR_EVT,
                    name_remove->getNextEvent());
        }
    }
}

// Tests removingFwdAddrsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent but a corrupt response is received, this occurs
//  MAX_UPDATE_TRIES_PER_SERVER times.
//
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_InvalidResponse) {
    NameRemoveStubPtr name_remove;

    // Create and prep a transaction, poised to run the handler.
    // The log message issued when this test succeeds, displays the
    // selected server, so we need to select a server before running this
    // test.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectFwdServer());

    // Verify that we can make maximum number of update attempts permitted
    // and then transition to selecting a new server.
    int max_tries = NameChangeTransaction::MAX_UPDATE_TRIES_PER_SERVER;
    for (int i = 1; i <= max_tries; ++i) {
        // Run removingFwdAddrsHandler to construct send the request.
        EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

        // Simulate a corrupt server response.
        name_remove->setDnsUpdateStatus(DNSClient::INVALID_RESPONSE);
        name_remove->postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);

        // Run removingFwdAddrsHandler again to process the response.
        EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

        // Completion flags should be false.
        EXPECT_FALSE(name_remove->getForwardChangeCompleted());
        EXPECT_FALSE(name_remove->getReverseChangeCompleted());

        if (i < max_tries) {
            // We should be ready to try again.
            EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_ADDRS_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                    name_remove->getNextEvent());
        } else {
            // Server retries should be exhausted, time for a new server.
            EXPECT_EQ(NameRemoveTransaction::SELECTING_FWD_SERVER_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_IO_ERROR_EVT,
                    name_remove->getNextEvent());
        }
    }

}

// ************************ removingFwdRRsHandler Tests *****************

// Tests that removingFwdRRsHandler rejects invalid events.
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_InvalidEvent) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler but with
    // an invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_RRS_ST,
                                    StateModel::NOP_EVT));

    // Running the handler should throw.
    EXPECT_THROW(name_remove->removingFwdRRsHandler(),
                 NameRemoveTransactionError);
}

// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is UPDATE_OK_EVT.
//  The update request is sent without error.
//  A server response is received which indicates successful update.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_FwdOnlyOK) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    UPDATE_OK_EVT, FORWARD_CHG));

    // Should not be an update message yet.
    D2UpdateMessagePtr update_msg = name_remove->getDnsUpdateRequest();
    ASSERT_FALSE(update_msg);

    // At this point completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Run removingFwdRRsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Verify that an update message was constructed properly.
851
    checkRemoveFwdRRsRequest(*name_remove);
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952

    // Verify that we are still in this state and next event is NOP_EVT.
    // This indicates we "sent" the message and are waiting for IO completion.
    EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_ADDRS_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::NOP_EVT,
              name_remove->getNextEvent());

    // Simulate receiving a successful update response.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NOERROR());

    // Run removingFwdRRsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Forward completion should be true, reverse should be false.
    EXPECT_TRUE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since it is a forward only change, we should be done.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_OK_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}

// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
//  A server response is received which indicates successful update.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_FwdOnlyOK2) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    // Run removingFwdRRsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Simulate receiving a successful update response.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NOERROR());

    // Run removingFwdRRsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Forward completion should be true, reverse should be false.
    EXPECT_TRUE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since it is a forward only change, we should be done.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_OK_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}


// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  Initial posted event is UPDATE_OK_EVT.
//  The update request is sent without error.
//  A server response is received which indicates successful update.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_FwdAndRevOK) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    UPDATE_OK_EVT, FWD_AND_REV_CHG));

    // Run removingFwdRRsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Simulate receiving a successful update response.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NOERROR());

    // Run removingFwdRRsHandler again  to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Forward change completion should be true, reverse flag should be false.
    EXPECT_TRUE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since the request also includes a reverse change we should
    // be poised to start it. Verify that we transitioned correctly.
    EXPECT_EQ(NameChangeTransaction::SELECTING_REV_SERVER_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::SELECT_SERVER_EVT,
              name_remove->getNextEvent());
}

953
// Tests removingFwdAddrsHandler with the following scenario:
954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971
//
//  The request includes a forward and reverse change.
//  Initial posted event is UPDATE_OK_EVT.
//  The update request is sent without error.
//  A server response is received which indicates the FQDN is NOT in use.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_FqdnNotInUse) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    UPDATE_OK_EVT, FORWARD_CHG));

    // Run removingFwdRRsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

972 973
    // Simulate receiving a RRSET does not exist response.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXRRSET());
974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013

    // Run removingFwdRRsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Forwad completion flag should be true, reverse should still be false.
    EXPECT_TRUE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // The FQDN is no longer in use, RFC is unclear about this,
    // but we will treat this as success.
    // Since it is a forward only change, we should be done.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_OK_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}

// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  The update request is sent without error.
//  A server response is received which indicates the update was rejected.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_OtherRcode) {
    NameRemoveStubPtr name_remove;
    // Create the transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    UPDATE_OK_EVT, FWD_AND_REV_CHG));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectFwdServer());

    // Run removingFwdRRsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Simulate receiving server rejection response. Per RFC, anything other
1014
    // than no error is failure (we are also treating FQDN not in use is
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
    // success). Arbitrarily choosing refused.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::REFUSED());

    // Run removingFwdRRsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Completion flags should still be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // We should have failed the transaction. Verifiy that we transitioned
    // correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  Initial posted event is UPDATE_OK_EVT.
//  The update request send times out MAX_UPDATE_TRIES_PER_SERVER times.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_Timeout) {
    NameRemoveStubPtr name_remove;

    // Create the transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_RRS_ST,
                                    NameChangeTransaction::
                                    UPDATE_OK_EVT, FWD_AND_REV_CHG));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectFwdServer());

    // Verify that we can make maximum number of update attempts permitted
    // and then transition to selecting a new server.
    int max_tries = NameChangeTransaction::MAX_UPDATE_TRIES_PER_SERVER;
    for (int i = 1; i <= max_tries; ++i) {
        const D2UpdateMessagePtr prev_msg = name_remove->getDnsUpdateRequest();

        // Run removingFwdRRsHandler to send the request.
        EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

        const D2UpdateMessagePtr curr_msg = name_remove->getDnsUpdateRequest();
        if (i == 1) {
            // First time around we should build the message.
            EXPECT_FALSE(prev_msg);
            EXPECT_TRUE(curr_msg);
        } else {
            // Subsequent passes should reuse the request. We are only
            // looking to check that we have not replaced the pointer value
            // with a new pointer.  This tests the on_entry() logic which
            // clears the request ONLY upon initial entry into the state.
            EXPECT_TRUE(prev_msg == curr_msg);
        }

        // Simulate a server IO timeout.
        name_remove->setDnsUpdateStatus(DNSClient::TIMEOUT);
        name_remove->postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);

        // Run removingFwdRRsHandler again to process the response.
        EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

        // Completion flags should be false.
        EXPECT_FALSE(name_remove->getForwardChangeCompleted());
        EXPECT_FALSE(name_remove->getReverseChangeCompleted());

        if (i < max_tries) {
            // We should be ready to try again.
            EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_RRS_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                    name_remove->getNextEvent());
        } else {
1092
            // Server retries should be exhausted.
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161
            // We should abandon the transaction.
            EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_IO_ERROR_EVT,
                    name_remove->getNextEvent());
        }
    }
}

// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes a forward and reverse change.
//  Initial posted event is UPDATE_OK_EVT.
//  The update request is sent but a corrupt response is received, this occurs
//  MAX_UPDATE_TRIES_PER_SERVER times.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_InvalidResponse) {
    NameRemoveStubPtr name_remove;

    // Create the transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_RRS_ST,
                                    NameChangeTransaction::
                                    UPDATE_OK_EVT, FWD_AND_REV_CHG));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectFwdServer());

    // Verify that we can make maximum number of update attempts permitted
    // and then transition to selecting a new server.
    int max_tries = NameChangeTransaction::MAX_UPDATE_TRIES_PER_SERVER;
    for (int i = 1; i <= max_tries; ++i) {
        const D2UpdateMessagePtr prev_msg = name_remove->getDnsUpdateRequest();

        // Run removingFwdRRsHandler to send the request.
        EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

        const D2UpdateMessagePtr curr_msg = name_remove->getDnsUpdateRequest();
        if (i == 1) {
            // First time around we should build the message.
            EXPECT_FALSE(prev_msg);
            EXPECT_TRUE(curr_msg);
        } else {
            // Subsequent passes should reuse the request. We are only
            // looking to check that we have not replaced the pointer value
            // with a new pointer.  This tests the on_entry() logic which
            // clears the request ONLY upon initial entry into the state.
            EXPECT_TRUE(prev_msg == curr_msg);
        }

        // Simulate a corrupt server response.
        name_remove->setDnsUpdateStatus(DNSClient::INVALID_RESPONSE);
        name_remove->postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);

        // Run removingFwdRRsHandler again to process the response.
        EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

        // Completion flags should be false.
        EXPECT_FALSE(name_remove->getForwardChangeCompleted());
        EXPECT_FALSE(name_remove->getReverseChangeCompleted());

        if (i < max_tries) {
            // We should be ready to try again.
            EXPECT_EQ(NameRemoveTransaction::REMOVING_FWD_RRS_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                    name_remove->getNextEvent());
        } else {
1162
            // Server retries should be exhausted.
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
            // We should abandon the transaction.
            EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_IO_ERROR_EVT,
                    name_remove->getNextEvent());
        }
    }
}


// Tests the selectingRevServerHandler functionality.
// It verifies behavior for the following scenarios:
//
// 1. Posted event is SELECT_SERVER_EVT
// 2. Posted event is SERVER_IO_ERROR_EVT
// 3. Posted event is invalid
//
TEST_F(NameRemoveTransactionTest, selectingRevServerHandler) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    SELECTING_REV_SERVER_ST,
                                    NameChangeTransaction::SELECT_SERVER_EVT));

    // Call selectingRevServerHandler enough times to select all of the
    // servers in it's current domain.  The first time, it will be with
    // next event of SELECT_SERVER_EVT.  Thereafter it will be with a next
    // event of SERVER_IO_ERROR_EVT.
    int num_servers = name_remove->getReverseDomain()->getServers()->size();
    for (int i = 0; i < num_servers; ++i) {
        // Run selectingRevServerHandler.
        ASSERT_NO_THROW(name_remove->selectingRevServerHandler())
                        << " num_servers: " << num_servers
                        << " selections: " << i;

        // Verify that a server was selected.
        ASSERT_TRUE(name_remove->getCurrentServer())
                    << " num_servers: " << num_servers
                    << " selections: " << i;

        // Verify that we transitioned correctly.
        ASSERT_EQ(NameRemoveTransaction::REMOVING_REV_PTRS_ST,
                  name_remove->getCurrState())
                  << " num_servers: " << num_servers << " selections: " << i;
        ASSERT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                  name_remove->getNextEvent())
                  << " num_servers: " << num_servers << " selections: " << i;

        // Post a server IO error event.  This simulates an IO error occuring
        // and a need to select the new server.
        ASSERT_NO_THROW(name_remove->postNextEvent(NameChangeTransaction::
                                                SERVER_IO_ERROR_EVT))
                        << " num_servers: " << num_servers
                        << " selections: " << i;
    }

    // We should have exhausted the list of servers. Processing another
    // SERVER_IO_ERROR_EVT should transition us to failure.
    EXPECT_NO_THROW(name_remove->selectingRevServerHandler());
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::NO_MORE_SERVERS_EVT,
              name_remove->getNextEvent());

    // Create and prep transaction, poised to run the handler but with an
    // invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    SELECTING_REV_SERVER_ST,
                                    StateModel::NOP_EVT));

    // Running the handler should throw.
    EXPECT_THROW(name_remove->selectingRevServerHandler(),
                 NameRemoveTransactionError);
}

1240
//************************** removingRevPtrsHandler tests *****************
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256

// Tests that removingRevPtrsHandler rejects invalid events.
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_InvalidEvent) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler but with
    // an invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    StateModel::NOP_EVT));

    // Running the handler should throw.
    EXPECT_THROW(name_remove->removingRevPtrsHandler(),
                 NameRemoveTransactionError);
}

1257
// Tests removingRevPtrsHandler with the following scenario:
1258 1259 1260 1261 1262 1263
//
//  The request includes only a reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
//  A server response is received which indicates successful update.
//
1264
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_RevOnlyOK) {
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, REVERSE_CHG));

    // Should not be an update message yet.
    D2UpdateMessagePtr update_msg = name_remove->getDnsUpdateRequest();
    ASSERT_FALSE(update_msg);

    // At this point completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Run removingRevPtrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Verify that an update message was constructed properly.
1285
    checkRemoveRevPtrsRequest(*name_remove);
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311

    // Verify that we are still in this state and next event is NOP_EVT.
    // This indicates we "sent" the message and are waiting for IO completion.
    EXPECT_EQ(NameRemoveTransaction::REMOVING_REV_PTRS_ST,
              name_remove->getCurrState());
    EXPECT_EQ(StateModel::NOP_EVT,
              name_remove->getNextEvent());

    // Simulate receiving a successful update response.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NOERROR());

    // Run removingRevPtrsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Forward completion should be false, reverse should be true.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_TRUE(name_remove->getReverseChangeCompleted());

    // Since it is a reverse change, we should be done.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_OK_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}

1312
// Tests removingRevPtrsHandler with the following scenario:
1313 1314 1315 1316
//
//  The request includes only a reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
1317
//  A server response is received which indicates FQDN is NOT in use.
1318
//
1319
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_FqdnNotInUse) {
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, REVERSE_CHG));

    // Should not be an update message yet.
    D2UpdateMessagePtr update_msg = name_remove->getDnsUpdateRequest();
    ASSERT_FALSE(update_msg);

    // At this point completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Run removingRevPtrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Verify that an update message was constructed properly.
1340
    checkRemoveRevPtrsRequest(*name_remove);
1341 1342 1343 1344 1345 1346 1347 1348

    // Verify that we are still in this state and next event is NOP_EVT.
    // This indicates we "sent" the message and are waiting for IO completion.
    EXPECT_EQ(NameRemoveTransaction::REMOVING_REV_PTRS_ST,
              name_remove->getCurrState());
    EXPECT_EQ(StateModel::NOP_EVT,
              name_remove->getNextEvent());

1349 1350
    // Simulate receiving a RRSET does not exist.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXRRSET());
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572

    // Run removingRevPtrsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Forward completion should be false, reverse should be true.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_TRUE(name_remove->getReverseChangeCompleted());

    // Since it is a reverse change, we should be done.
    // Verify that we transitioned correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_OK_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_OK_EVT,
              name_remove->getNextEvent());
}

// Tests removingRevPtrsHandler with the following scenario:
//
//  The request includes only a reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent without error.
//  A server response is received which indicates the update was rejected.
//
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_OtherRcode) {
    NameRemoveStubPtr name_remove;
    // Create the transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, REVERSE_CHG));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectRevServer());

    // Run removingRevPtrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Simulate receiving server rejection response. Per RFC, anything other
    // than no error is failure.  Arbitrarily choosing refused.
    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::REFUSED());

    // Run removingRevPtrsHandler again to process the response.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Completion flags should still be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // We should have failed the transaction. Verify that we transitioned
    // correctly.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

// Tests removingRevPtrsHandler with the following scenario:
//
//  The request includes only a reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request send times out MAX_UPDATE_TRIES_PER_SERVER times.
//
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_Timeout) {
    NameRemoveStubPtr name_remove;
    // Create the transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, REVERSE_CHG));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectRevServer());

    // Verify that we can make maximum number of update attempts permitted
    // and then transition to selecting a new server.
    int max_tries = NameChangeTransaction::MAX_UPDATE_TRIES_PER_SERVER;
    for (int i = 1; i <= max_tries; ++i) {
        const D2UpdateMessagePtr prev_msg = name_remove->getDnsUpdateRequest();

        // Run removingRevPtrsHandler to send the request.
        EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

        const D2UpdateMessagePtr curr_msg = name_remove->getDnsUpdateRequest();
        if (i == 1) {
            // First time around we should build the message.
            EXPECT_FALSE(prev_msg);
            EXPECT_TRUE(curr_msg);
        } else {
            // Subsequent passes should reuse the request. We are only
            // looking to check that we have not replaced the pointer value
            // with a new pointer.  This tests the on_entry() logic which
            // clears the request ONLY upon initial entry into the state.
            EXPECT_TRUE(prev_msg == curr_msg);
        }

        // Simulate a server IO timeout.
        name_remove->setDnsUpdateStatus(DNSClient::TIMEOUT);
        name_remove->postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);

        // Run removingRevPtrsHandler again to process the response.
        EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

        // Completion flags should be false.
        EXPECT_FALSE(name_remove->getForwardChangeCompleted());
        EXPECT_FALSE(name_remove->getReverseChangeCompleted());

        if (i < max_tries) {
            // We should be ready to try again.
            EXPECT_EQ(NameRemoveTransaction::REMOVING_REV_PTRS_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                      name_remove->getNextEvent());
        } else {
            // Server retries should be exhausted, time for a new server.
            EXPECT_EQ(NameChangeTransaction::SELECTING_REV_SERVER_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_IO_ERROR_EVT,
                      name_remove->getNextEvent());
        }
    }
}


// Tests removingRevPtrsHandler with the following scenario:
//
//  The request includes only a reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The update request is sent but a corrupt response is received, this occurs
//  MAX_UPDATE_TRIES_PER_SERVER times.
//
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_CorruptResponse) {
    NameRemoveStubPtr name_remove;
    // Create the transaction.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, REVERSE_CHG));

    // Select a server to satisfy log statements.
    ASSERT_TRUE(name_remove->selectRevServer());

    // Verify that we can make maximum number of update attempts permitted
    // and then transition to selecting a new server.
    int max_tries = NameChangeTransaction::MAX_UPDATE_TRIES_PER_SERVER;
    for (int i = 1; i <= max_tries; ++i) {
        const D2UpdateMessagePtr prev_msg = name_remove->getDnsUpdateRequest();

        // Run removingRevPtrsHandler to send the request.
        EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

        const D2UpdateMessagePtr curr_msg = name_remove->getDnsUpdateRequest();
        if (i == 1) {
            // First time around we should build the message.
            EXPECT_FALSE(prev_msg);
            EXPECT_TRUE(curr_msg);
        } else {
            // Subsequent passes should reuse the request. We are only
            // looking to check that we have not replaced the pointer value
            // with a new pointer.  This tests the on_entry() logic which
            // clears the request ONLY upon initial entry into the state.
            EXPECT_TRUE(prev_msg == curr_msg);
        }

        // Simulate a server corrupt response.
        name_remove->setDnsUpdateStatus(DNSClient::INVALID_RESPONSE);
        name_remove->postNextEvent(NameChangeTransaction::IO_COMPLETED_EVT);

        // Run removingRevPtrsHandler again to process the response.
        EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

        // Completion flags should be false.
        EXPECT_FALSE(name_remove->getForwardChangeCompleted());
        EXPECT_FALSE(name_remove->getReverseChangeCompleted());

        if (i < max_tries) {
            // We should be ready to try again.
            EXPECT_EQ(NameRemoveTransaction::REMOVING_REV_PTRS_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_SELECTED_EVT,
                      name_remove->getNextEvent());
        } else {
            // Server retries should be exhausted, time for a new server.
            EXPECT_EQ(NameChangeTransaction::SELECTING_REV_SERVER_ST,
                      name_remove->getCurrState());
            EXPECT_EQ(NameChangeTransaction::SERVER_IO_ERROR_EVT,
                      name_remove->getNextEvent());
        }
    }
}

// Tests the processRemoveOkHandler functionality.
// It verifies behavior for the following scenarios:
//
// 1. Posted event is UPDATE_OK_EVT
// 2. Posted event is invalid
//
TEST_F(NameRemoveTransactionTest, processRemoveOkHandler) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::PROCESS_TRANS_OK_ST,
                                    NameChangeTransaction::UPDATE_OK_EVT));
    // Run processRemoveOkHandler.
    EXPECT_NO_THROW(name_remove->processRemoveOkHandler());

    // Verify that a server was selected.
    EXPECT_EQ(dhcp_ddns::ST_COMPLETED, name_remove->getNcrStatus());

    // Verify that the model has ended.
    EXPECT_EQ(StateModel::END_ST, name_remove->getCurrState());
    EXPECT_EQ(StateModel::END_EVT, name_remove->getNextEvent());


    // Create and prep transaction, poised to run the handler but with an
    // invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::PROCESS_TRANS_OK_ST,
                                    StateModel::NOP_EVT));
    // Running the handler should throw.
1573
    EXPECT_THROW(name_remove->processRemoveOkHandler(),
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608
                 NameRemoveTransactionError);
}

// Tests the processRemoveFailedHandler functionality.
// It verifies behavior for the following scenarios:
//
// 1. Posted event is UPDATE_FAILED_EVT
// 2. Posted event is invalid
//
TEST_F(NameRemoveTransactionTest, processRemoveFailedHandler) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    PROCESS_TRANS_FAILED_ST,
                                    NameChangeTransaction::UPDATE_FAILED_EVT));
    // Run processRemoveFailedHandler.
    EXPECT_NO_THROW(name_remove->processRemoveFailedHandler());

    // Verify that a server was selected.
    EXPECT_EQ(dhcp_ddns::ST_FAILED, name_remove->getNcrStatus());

    // Verify that the model has ended. (Remember, the transaction failed NOT
    // the model.  The model should have ended normally.)
    EXPECT_EQ(StateModel::END_ST, name_remove->getCurrState());
    EXPECT_EQ(StateModel::END_EVT, name_remove->getNextEvent());


    // Create and prep transaction, poised to run the handler but with an
    // invalid event.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    PROCESS_TRANS_FAILED_ST,
                                    StateModel::NOP_EVT));
    // Running the handler should throw.
1609
    EXPECT_THROW(name_remove->processRemoveFailedHandler(),
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
                 NameRemoveTransactionError);
}

// Tests the processRemoveFailedHandler functionality.
// It verifies behavior for posted event of NO_MORE_SERVERS_EVT.
TEST_F(NameRemoveTransactionTest, processRemoveFailedHandler_NoMoreServers) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    PROCESS_TRANS_FAILED_ST,
                                    NameChangeTransaction::
                                    NO_MORE_SERVERS_EVT));

    // Run processRemoveFailedHandler.
    EXPECT_NO_THROW(name_remove->processRemoveFailedHandler());

    // Verify that a server was selected.
    EXPECT_EQ(dhcp_ddns::ST_FAILED, name_remove->getNcrStatus());

    // Verify that the model has ended. (Remember, the transaction failed NOT
    // the model.  The model should have ended normally.)
    EXPECT_EQ(StateModel::END_ST, name_remove->getCurrState());
    EXPECT_EQ(StateModel::END_EVT, name_remove->getNextEvent());
}

// Tests the processRemoveFailedHandler functionality.
// It verifies behavior for posted event of SERVER_IO_ERROR_EVT.
TEST_F(NameRemoveTransactionTest, processRemoveFailedHandler_ServerIOError) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameChangeTransaction::
                                    PROCESS_TRANS_FAILED_ST,
                                    NameChangeTransaction::
                                    SERVER_IO_ERROR_EVT));

    // Run processRemoveFailedHandler.
    EXPECT_NO_THROW(name_remove->processRemoveFailedHandler());

    // Verify that a server was selected.
    EXPECT_EQ(dhcp_ddns::ST_FAILED, name_remove->getNcrStatus());

    // Verify that the model has ended. (Remember, the transaction failed NOT
    // the model.  The model should have ended normally.)
    EXPECT_EQ(StateModel::END_ST, name_remove->getCurrState());
    EXPECT_EQ(StateModel::END_EVT, name_remove->getNextEvent());
}

// Tests removingFwdAddrsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The send update request fails due to an unexpected exception.
//
TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_sendUpdateException) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    name_remove->simulate_send_exception_ = true;

    // Run removingFwdAddrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since IO exceptions should be gracefully handled, any that occur
    // are unanticipated, and deemed unrecoverable, so the transaction should
    // be transitioned to failure.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}


// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The send update request fails due to an unexpected exception.
//
TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_SendUpdateException) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_RRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    name_remove->simulate_send_exception_ = true;

    // Run removingFwdRRsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since IO exceptions should be gracefully handled, any that occur
    // are unanticipated, and deemed unrecoverable, so the transaction should
    // be transitioned to failure.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

// Tests removingRevPtrHandler with the following scenario:
//
//  The request includes only a reverse change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The send update request fails due to an unexpected exception.
//
TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_SendUpdateException) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, REVERSE_CHG));

    name_remove->simulate_send_exception_ = true;

    // Run removingRevPtrsHandler to construct and send the request.
    EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since IO exceptions should be gracefully handled, any that occur
    // are unanticipated, and deemed unrecoverable, so the transaction should
    // be transitioned to failure.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

// Tests removingFwdAddrsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The request build fails due to an unexpected exception.
//
1765
TEST_F(NameRemoveTransactionTest,
1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
       removingFwdAddrsHandler_BuildRequestException) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_ADDRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    // Set the one-shot exception simulation flag.
    name_remove->simulate_build_request_exception_ = true;

    // Run removingFwdAddrsHandler to construct and send the request.
    // This should fail with a build request throw which should be caught
    // in the state handler.
    ASSERT_NO_THROW(name_remove->removingFwdAddrsHandler());

    // Verify we did not attempt to send anything.
    EXPECT_EQ(0, name_remove->getUpdateAttempts());

    // Completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since IO exceptions should be gracefully handled, any that occur
    // are unanticipated, and deemed unrecoverable, so the transaction should
    // be transitioned to failure.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

// Tests removingFwdRRsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The request build fails due to an unexpected exception.
//
1805
TEST_F(NameRemoveTransactionTest,
1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
       removingFwdRRsHandler_BuildRequestException) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_FWD_RRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    // Set the one-shot exception simulation flag.
    name_remove->simulate_build_request_exception_ = true;

    // Run removingFwdRRsHandler to construct and send the request.
    // This should fail with a build request throw which should be caught
    // in the state handler.
    ASSERT_NO_THROW(name_remove->removingFwdRRsHandler());

    // Verify we did not attempt to send anything.
    EXPECT_EQ(0, name_remove->getUpdateAttempts());

    // Completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since IO exceptions should be gracefully handled, any that occur
    // are unanticipated, and deemed unrecoverable, so the transaction should
    // be transitioned to failure.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

// Tests removingRevPTRsHandler with the following scenario:
//
//  The request includes only a forward change.
//  Initial posted event is SERVER_SELECTED_EVT.
//  The request build fails due to an unexpected exception.
//
1845
TEST_F(NameRemoveTransactionTest,
1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879
       removingRevPTRsHandler_BuildRequestException) {
    NameRemoveStubPtr name_remove;
    // Create and prep a transaction, poised to run the handler.
    ASSERT_NO_THROW(name_remove =
                    prepHandlerTest(NameRemoveTransaction::
                                    REMOVING_REV_PTRS_ST,
                                    NameChangeTransaction::
                                    SERVER_SELECTED_EVT, FORWARD_CHG));

    // Set the one-shot exception simulation flag.
    name_remove->simulate_build_request_exception_ = true;

    // Run removingRevPtrsHandler to construct and send the request.
    // This should fail with a build request throw which should be caught
    // in the state handler.
    ASSERT_NO_THROW(name_remove->removingRevPtrsHandler());

    // Verify we did not attempt to send anything.
    EXPECT_EQ(0, name_remove->getUpdateAttempts());

    // Completion flags should be false.
    EXPECT_FALSE(name_remove->getForwardChangeCompleted());
    EXPECT_FALSE(name_remove->getReverseChangeCompleted());

    // Since IO exceptions should be gracefully handled, any that occur
    // are unanticipated, and deemed unrecoverable, so the transaction should
    // be transitioned to failure.
    EXPECT_EQ(NameChangeTransaction::PROCESS_TRANS_FAILED_ST,
              name_remove->getCurrState());
    EXPECT_EQ(NameChangeTransaction::UPDATE_FAILED_EVT,
              name_remove->getNextEvent());
}

}