lfc_controller_unittests.cc 23.8 KB
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// Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
//
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#include <lfc/lfc_controller.h>
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#include <util/csv_file.h>
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#include <gtest/gtest.h>
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#include <fstream>
#include <cerrno>
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using namespace isc::lfc;
using namespace std;

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namespace {

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class LFCControllerTest : public ::testing::Test {
public:
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    string pstr_; ///< String for name for pid file
    string xstr_; ///< String for name for previous file
    string istr_; ///< String for name for copy file
    string ostr_; ///< String for name for output file
    string fstr_; ///< String for name for finish file
    string cstr_; ///< String for name for config file
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    string v4_hdr_; ///< String for the header of the v4 csv test file
    string v6_hdr_; ///< String for the header of the v6 csv test file
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    /// @brief Create a file and write the given string into it.
    void writeFile(const std::string& filename, const std::string& contents) const;

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    /// @brief Read a string from a file
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    std::string readFile(const std::string& filename) const;

    /// @brief Test if a file doesn't exist
    ///
    /// @returns true if the file doesn't exist, false if it does
    bool noExist(const std::string& filename) const {
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        return ((remove(filename.c_str()) != 0) && (errno == ENOENT));
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    }

    /// @brief Test if any of the temporary (copy, output or finish)
    /// files exist
    ///
    /// @returns true if no files exist, and false if any do.
    bool noExistIOF() const {
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        return (noExist(istr_) && noExist(ostr_) && noExist(fstr_));
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    }

    /// @brief Test if any of the temporary (copy, output or finish)
    /// files and the pid file exist
    ///
    /// @returns true if no files exist, and false if any do.
    bool noExistIOFP() const {
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        return ((noExist(istr_) && noExist(ostr_) &&
                 noExist(fstr_) && noExist(pstr_)));
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    }

    /// @brief Remove any files we may have created
    void removeTestFile() const {
        remove(pstr_.c_str());
        remove(xstr_.c_str());
        remove(istr_.c_str());
        remove(ostr_.c_str());
        remove(fstr_.c_str());
    }
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protected:
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    /// @brief Sets up the file names and header string and removes
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    /// any old test files before the test
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    virtual void SetUp() {
        // set up the test files we need
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        string base_dir = TEST_DATA_BUILDDIR;
        string lf = "lease_file.";

        pstr_ = base_dir + "/" + lf + "pid";        // pid
        xstr_ = base_dir + "/" + lf + "2";          // previous
        istr_ = base_dir + "/" + lf + "1";          // copy
        ostr_ = base_dir + "/" + lf + "output";     // output
        fstr_ = base_dir + "/" + lf + "completed";  // finish
        cstr_ = base_dir + "/" + "config_file";     // config

        v4_hdr_ = "address,hwaddr,client_id,valid_lifetime,expire,subnet_id,"
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                  "fqdn_fwd,fqdn_rev,hostname,state\n";
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        v6_hdr_ = "address,duid,valid_lifetime,expire,subnet_id,"
                  "pref_lifetime,lease_type,iaid,prefix_len,fqdn_fwd,"
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                  "fqdn_rev,hostname,hwaddr,state\n";
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        // and remove any outstanding test files
        removeTestFile();
    }

    /// @brief Removes any remaining test files after the test
    virtual void TearDown() {
        removeTestFile();
    }

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    /// @Wrapper to invoke the controller's launch method  Please refer to
    /// lfcController::launch for details.  This is wrapped to provide
    /// a single place to update the test_mode throughout the file.
    void launch(LFCController lfc_controller, int argc, char* argv[]) {
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        lfc_controller.launch(argc, argv, true);
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    }

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private:
};

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std::string
LFCControllerTest::readFile(const std::string& filename) const {
    std::ifstream fs;

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    fs.open(filename.c_str(), std::ifstream::in);
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    std::string contents((std::istreambuf_iterator<char>(fs)),
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                         std::istreambuf_iterator<char>());
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    fs.close();
    return (contents);
}

void
LFCControllerTest::writeFile(const std::string& filename,
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                             const std::string& contents) const {
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    std::ofstream fs(filename.c_str(), std::ofstream::out);
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    if (fs.is_open()) {
        fs << contents;
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        fs.close();
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    }
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}

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/// @brief Verify initial state of LFC controller.
/// Create an instance of the controller and see that
/// all of the initial values are empty as expected.
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TEST_F(LFCControllerTest, initialValues) {
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    LFCController lfc_controller;

    // Verify that we start with all the private variables empty
    EXPECT_EQ(lfc_controller.getProtocolVersion(), 0);
    EXPECT_TRUE(lfc_controller.getConfigFile().empty());
    EXPECT_TRUE(lfc_controller.getPreviousFile().empty());
    EXPECT_TRUE(lfc_controller.getCopyFile().empty());
    EXPECT_TRUE(lfc_controller.getOutputFile().empty());
    EXPECT_TRUE(lfc_controller.getFinishFile().empty());
    EXPECT_TRUE(lfc_controller.getPidFile().empty());
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}

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/// @brief Verify that parsing a full command line works.
/// Parse a complete command line then verify the parsed
/// and saved data matches our expectations.
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TEST_F(LFCControllerTest, fullCommandLine) {
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    LFCController lfc_controller;
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    // Verify that standard options can be parsed without error
    char* argv[] = { const_cast<char*>("progName"),
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                     const_cast<char*>("-4"),
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                     const_cast<char*>("-x"),
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                     const_cast<char*>("previous"),
                     const_cast<char*>("-i"),
                     const_cast<char*>("copy"),
                     const_cast<char*>("-o"),
                     const_cast<char*>("output"),
                     const_cast<char*>("-c"),
                     const_cast<char*>("config"),
                     const_cast<char*>("-f"),
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                     const_cast<char*>("finish"),
                     const_cast<char*>("-p"),
                     const_cast<char*>("pid") };
    int argc = 14;
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    ASSERT_NO_THROW(lfc_controller.parseArgs(argc, argv));
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    // Check all the parsed data from above to the known values
    EXPECT_EQ(lfc_controller.getProtocolVersion(), 4);
    EXPECT_EQ(lfc_controller.getConfigFile(), "config");
    EXPECT_EQ(lfc_controller.getPreviousFile(), "previous");
    EXPECT_EQ(lfc_controller.getCopyFile(), "copy");
    EXPECT_EQ(lfc_controller.getOutputFile(), "output");
    EXPECT_EQ(lfc_controller.getFinishFile(), "finish");
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    EXPECT_EQ(lfc_controller.getPidFile(), "pid");
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}

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/// @brief Verify that parsing a correct but incomplete line fails.
/// Parse a command line that is correctly formatted but isn't complete
/// (doesn't include some options or an some option arguments).  We
/// expect that the parse will fail with an InvalidUsage exception.
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TEST_F(LFCControllerTest, notEnoughData) {
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    LFCController lfc_controller;
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    // Test the results if we don't include all of the required arguments
    // This argument list is correct but we shall only suppy part of it
    // to the parse routine via the argc variable.
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    char* argv[] = { const_cast<char*>("progName"),
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                     const_cast<char*>("-4"),
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                     const_cast<char*>("-x"),
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                     const_cast<char*>("previous"),
                     const_cast<char*>("-i"),
                     const_cast<char*>("copy"),
                     const_cast<char*>("-o"),
                     const_cast<char*>("output"),
                     const_cast<char*>("-c"),
                     const_cast<char*>("config"),
                     const_cast<char*>("-f"),
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                     const_cast<char*>("finish"),
                     const_cast<char*>("-p"),
                     const_cast<char*>("pid") };
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    int argc = 1;
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    for (; argc < 14; ++argc) {
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        EXPECT_THROW(lfc_controller.parseArgs(argc, argv), InvalidUsage)
            << "test failed for argc = " << argc;
    }
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    // Verify we can still parse the full string properly
    ASSERT_NO_THROW(lfc_controller.parseArgs(argc, argv));
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}

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/// @brief Verify that extra arguments cause the parse to fail.
/// Parse a full command line plus some extra arguments on the end
/// to verify that we don't stop parsing when we find all of the
/// required arguments.  We exepct the parse to fail with an
/// InvalidUsage exception.
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TEST_F(LFCControllerTest, tooMuchData) {
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    LFCController lfc_controller;
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    // The standard options plus some others

    char* argv[] = { const_cast<char*>("progName"),
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                     const_cast<char*>("-4"),
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                     const_cast<char*>("-x"),
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                     const_cast<char*>("previous"),
                     const_cast<char*>("-i"),
                     const_cast<char*>("copy"),
                     const_cast<char*>("-o"),
                     const_cast<char*>("output"),
                     const_cast<char*>("-c"),
                     const_cast<char*>("config"),
                     const_cast<char*>("-f"),
                     const_cast<char*>("finish"),
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                     const_cast<char*>("-p"),
                     const_cast<char*>("pid"),
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                     const_cast<char*>("some"),
                     const_cast<char*>("other"),
                     const_cast<char*>("args"),
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    };
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    int argc = 17;
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    // We expect an error as we have arguments that aren't valid
    EXPECT_THROW(lfc_controller.parseArgs(argc, argv), InvalidUsage);
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}

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/// @brief Verify that unknown arguments cause the parse to fail.
/// Parse some unknown arguments to verify that we generate the
/// proper InvalidUsage exception.
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TEST_F(LFCControllerTest, someBadData) {
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    LFCController lfc_controller;
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    // Some random arguments
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    char* argv[] = { const_cast<char*>("progName"),
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                     const_cast<char*>("some"),
                     const_cast<char*>("bad"),
                     const_cast<char*>("args"),
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    };
    int argc = 4;

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    // We expect an error as the arguments aren't valid
    EXPECT_THROW(lfc_controller.parseArgs(argc, argv), InvalidUsage);
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}
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/// @brief Verify that we do file rotation correctly.  We create different
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/// files and see if we properly delete and move them.
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TEST_F(LFCControllerTest, fileRotate) {
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    LFCController lfc_controller, lfc_controller_launch;

    // We can use the same arguments and controller for all of the tests
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    // as the files get redone for each subtest.  We leave "-d" in the arg
    // list but don't pass it as we use 14 as the argument count.  This
    // makes it easy to turn it on by simply increasing argc below to 15
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    char* argv[] = { const_cast<char*>("progName"),
                     const_cast<char*>("-4"),
                     const_cast<char*>("-x"),
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                     const_cast<char*>(xstr_.c_str()),
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                     const_cast<char*>("-i"),
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                     const_cast<char*>(istr_.c_str()),
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                     const_cast<char*>("-o"),
                     const_cast<char*>(ostr_.c_str()),
                     const_cast<char*>("-c"),
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                     const_cast<char*>(cstr_.c_str()),
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                     const_cast<char*>("-f"),
                     const_cast<char*>(fstr_.c_str()),
                     const_cast<char*>("-p"),
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                     const_cast<char*>(pstr_.c_str()),
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                     const_cast<char*>("-d")
    };
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    int argc = 14;
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    lfc_controller.parseArgs(argc, argv);

    // Test 1: Start with no files - we expect an execption as there
    // is no file to copy.
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    EXPECT_THROW(lfc_controller.fileRotate(), RunTimeFail);
    removeTestFile();
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    // Test 2: Create a file for each of previous, copy and finish.  We should
    // delete the previous and copy files then move finish to previous.
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    writeFile(xstr_, "1");
    writeFile(istr_, "2");
    writeFile(fstr_, "3");
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    lfc_controller.fileRotate();
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    // verify finish is now previous and no temp files remain.
    EXPECT_EQ(readFile(xstr_), "3");
    EXPECT_TRUE(noExistIOF());
    removeTestFile();
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    // Test 3: Create a file for previous and finish but not copy.
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    writeFile(xstr_, "4");
    writeFile(fstr_, "6");
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    lfc_controller.fileRotate();
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    // verify finish is now previous and no temp files remain.
    EXPECT_EQ(readFile(xstr_), "6");
    EXPECT_TRUE(noExistIOF());
    removeTestFile();
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    // Test 4: Create a file for copy and finish but not previous.
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    writeFile(istr_, "8");
    writeFile(fstr_, "9");
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    lfc_controller.fileRotate();
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    // verify finish is now previous and no temp files remain.
    EXPECT_EQ(readFile(xstr_), "9");
    EXPECT_TRUE(noExistIOF());
    removeTestFile();
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    // Test 5: rerun test 2 but using launch instead of cleanup
    // as we already have a finish file we shouldn't do any extra
    // processing
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    writeFile(xstr_, "10");
    writeFile(istr_, "11");
    writeFile(fstr_, "12");
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    launch(lfc_controller_launch, argc, argv);
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    // verify finish is now previous and no temp files or pid remain.
    EXPECT_EQ(readFile(xstr_), "12");
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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}

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/// @brief Verify that we properly combine and clean up files
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///
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/// This is mostly a retest as we already test that the loader and
/// writer functions work in their own tests but we combine it all
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/// here.  We check: both files available, only previous, only copy
/// neither and one of them having many lease errors.  This is the
/// v4 version.
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TEST_F(LFCControllerTest, launch4) {
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    LFCController lfc_controller;

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    // The arg list for our test.  We generally use the
    // same file names to make it easy.  We include the -d
    // in the argv list in case we want to enable verbose
    // for debugging purposes.  To enable it change argc from
    // 14 to 15
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    char* argv[] = { const_cast<char*>("progName"),
                     const_cast<char*>("-4"),
                     const_cast<char*>("-x"),
                     const_cast<char*>(xstr_.c_str()),
                     const_cast<char*>("-i"),
                     const_cast<char*>(istr_.c_str()),
                     const_cast<char*>("-o"),
                     const_cast<char*>(ostr_.c_str()),
                     const_cast<char*>("-c"),
                     const_cast<char*>(cstr_.c_str()),
                     const_cast<char*>("-f"),
                     const_cast<char*>(fstr_.c_str()),
                     const_cast<char*>("-p"),
                     const_cast<char*>(pstr_.c_str()),
                     const_cast<char*>("-d")
    };
    int argc = 14;
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    string test_str, astr;

    // Create the various strings we want to use, the header is predefined.
    // We have several entries for different leases, the naming is:
    // <lease letter>_<version#>
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    string a_1 = "192.0.2.1,06:07:08:09:0a:bc,,"
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                 "200,200,8,1,1,host.example.com,1\n";
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    string a_2 = "192.0.2.1,06:07:08:09:0a:bc,,"
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                 "200,500,8,1,1,host.example.com,1\n";
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    string a_3 = "192.0.2.1,06:07:08:09:0a:bc,,"
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                 "200,800,8,1,1,host.example.com,1\n";
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    string b_1 = "192.0.3.15,dd:de:ba:0d:1b:2e:3e:4f,0a:00:01:04,"
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                 "100,100,7,0,0,,1\n";
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    string b_2 = "192.0.3.15,dd:de:ba:0d:1b:2e:3e:4f,0a:00:01:04,"
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                 "100,135,7,0,0,,1\n";
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    string b_3 = "192.0.3.15,dd:de:ba:0d:1b:2e:3e:4f,0a:00:01:04,"
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                 "100,150,7,0,0,,1\n";
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    // This one should be invalid, no hardware address and state is not declined
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    string c_1 = "192.0.2.3,,a:11:01:04,"
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                 "200,200,8,1,1,host.example.com,0\n";
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    string d_1 = "192.0.2.5,16:17:18:19:1a:bc,,"
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                 "200,200,8,1,1,host.example.com,1\n";
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    string d_2 = "192.0.2.5,16:17:18:19:1a:bc,,"
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                 "0,200,8,1,1,host.example.com,1\n";
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    // Subtest 1: both previous and copy available.
    // Create the test previous file
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    test_str = v4_hdr_ + a_1 + b_1 + c_1 + b_2 + a_2 + d_1;
    writeFile(xstr_, test_str);
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    // Create the test copy file
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    test_str = v4_hdr_ + a_3 + b_3 + d_2;
    writeFile(istr_, test_str);
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    // Run the cleanup
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    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect the last lease for each ip
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    // except for C which was invalid and D which has expired.
    // We also verify none of the temp or pid files remain.
    test_str = v4_hdr_ + a_3 + b_3;
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 2: only previous available
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    // Create the test previous file
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    test_str = v4_hdr_ + a_1 + b_1 + c_1 + b_2 + a_2 + d_1;
    writeFile(xstr_, test_str);
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    // No copy file
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    // Run the cleanup
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    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect the last lease for each ip
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    // except for C which was invalid and D which has expired.
    // We also verify none of the temp or pid files remain.
    test_str = v4_hdr_ + a_2 + d_1 + b_2;
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 3: only copy available
    // No previous file
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    // Create the test copy file
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    test_str = v4_hdr_ + d_1 + a_1 + b_1 + b_3 + d_2 + a_3;
    writeFile(istr_, test_str);
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    // Run the cleanup
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    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect the last lease for each ip
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    // except for C which was invalid and D which has expired.
    // We also verify none of the temp or pid files remain.
    test_str = v4_hdr_ + a_3 + b_3;
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 4: neither available
    // No previous file

    // No copy file

    // Run the cleanup
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    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect a header and no leaes.
    // We also verify none of the temp or pid files remain.
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    test_str = v4_hdr_;
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    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 5: a file with a lot of errors
    // A previous file with a lot of errors
    astr = "1,\n2,\n3,\n4,\n5,\n6,\n7,\n7,\n8,\n9,\n10,\n";
    test_str = v4_hdr_ + astr + astr + astr + astr + astr +
               astr + astr + astr + astr + astr + astr;
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    writeFile(xstr_, test_str);
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    // No copy file

    // Run the cleanup, the file should fail but we should
    // catch the error and properly cleanup.
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    launch(lfc_controller, argc, argv);
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    // And we shouldn't have deleted the previous file.
    // We also verify none of the temp or pid files remain.
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
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}

/// @brief Verify that we properly combine and clean up files
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///
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/// This is mostly a retest as we already test that the loader and
/// writer functions work in their own tests but we combine it all
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/// here.  We check: both files available, only previous, only copy
/// neither and one of them having many lease errors.  This is the
/// v6 version.
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TEST_F(LFCControllerTest, launch6) {
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    LFCController lfc_controller;

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    // The arg list for our test.  We generally use the
    // same file names to make it easy.  We include the -d
    // in the argv list in case we want to enable verbose
    // for debugging purposes.  To enable it change argc from
    // 14 to 15
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    char* argv[] = { const_cast<char*>("progName"),
                     const_cast<char*>("-6"),
                     const_cast<char*>("-x"),
                     const_cast<char*>(xstr_.c_str()),
                     const_cast<char*>("-i"),
                     const_cast<char*>(istr_.c_str()),
                     const_cast<char*>("-o"),
                     const_cast<char*>(ostr_.c_str()),
                     const_cast<char*>("-c"),
                     const_cast<char*>(cstr_.c_str()),
                     const_cast<char*>("-f"),
                     const_cast<char*>(fstr_.c_str()),
                     const_cast<char*>("-p"),
                     const_cast<char*>(pstr_.c_str()),
                     const_cast<char*>("-d")
    };
    int argc = 14;
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    string test_str, astr;

    // Create the various strings we want to use, the header is predefined.
    // We have several entries for different leases, the naming is:
    // <lease letter>_<version#>.
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    string a_1 = "2001:db8:1::1,00:01:02:03:04:05:06:0a:0b:0c:0d:0e:0f,"
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                 "200,200,8,100,0,7,0,1,1,host.example.com,,1\n";
    string a_2 = "2001:db8:1::1,,200,200,8,100,0,7,0,1,1,host.example.com,,1\n";
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    string a_3 = "2001:db8:1::1,00:01:02:03:04:05:06:0a:0b:0c:0d:0e:0f,"
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                 "200,400,8,100,0,7,0,1,1,host.example.com,,1\n";
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    string a_4 = "2001:db8:1::1,00:01:02:03:04:05:06:0a:0b:0c:0d:0e:0f,"
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                 "0,200,8,100,0,7,0,1,1,host.example.com,,1\n";
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    string b_1 = "2001:db8:2::10,01:01:01:01:0a:01:02:03:04:05,"
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                 "300,300,6,150,0,8,0,0,0,,,1\n";
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    string b_2 = "2001:db8:2::10,01:01:01:01:0a:01:02:03:04:05,"
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                 "300,800,6,150,0,8,0,0,0,,,1\n";
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    string b_3 = "2001:db8:2::10,01:01:01:01:0a:01:02:03:04:05,"
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                 "300,1000,6,150,0,8,0,0,0,,,1\n";
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    string c_1 = "3000:1::,00:01:02:03:04:05:06:0a:0b:0c:0d:0e:0f,"
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                 "100,200,8,0,2,16,64,0,0,,,1\n";
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    string c_2 = "3000:1::,00:01:02:03:04:05:06:0a:0b:0c:0d:0e:0f,"
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                 "100,400,8,0,2,16,64,0,0,,,1\n";
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    string d_1 = "2001:db8:1::3,00:01:02:03:04:05:06:0a:0b:0c:0d:0e:0f,"
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                 "200,600,8,100,0,7,0,1,1,host.example.com,,1\n";
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    // Subtest 1: bot previous and copy available
    // Create the test previous file
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    test_str = v6_hdr_ + a_1 + b_1 + a_2 + c_1 + a_3 + b_2;
    writeFile(xstr_, test_str);
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    // Create the test copy file
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    test_str = v6_hdr_ + b_3 + a_4 + d_1 + c_2;
    writeFile(istr_, test_str);
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    // Run the cleanup
584
    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect the last lease for each ip
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    // except for A which has expired.
    // We also verify none of the temp or pid files remain.
    test_str = v6_hdr_ + d_1 + b_3 + c_2;
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 2: only previous available
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    // Create the test previous file
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    test_str = v6_hdr_ + a_1 + b_1 + a_2 + c_1 + a_3 + b_2;
    writeFile(xstr_, test_str);
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    // No copy file

    // Run the cleanup
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    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect the last lease for each ip.
    // We also verify none of the temp or pid files remain.
    test_str = v6_hdr_ + a_3 + b_2 + c_1;
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 3: only copy available
    // No previous file
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    // Create the test copy file
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    test_str = v6_hdr_ + a_1 + b_2 + b_3 + a_4 + d_1 + c_2;
    writeFile(istr_, test_str);
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    // Run the cleanup
621
    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect the last lease for each ip.
    // We also verify none of the temp or pid files remain.
    test_str = v6_hdr_ + d_1 + b_3 + c_2;
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 4: neither available
    // No previous file

    // No copy file

    // Run the cleanup
637
    launch(lfc_controller, argc, argv);
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    // Compare the results, we expect a header and no leases.
    // We also verify none of the temp or pid files remain.
641
    test_str = v6_hdr_;
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    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
    removeTestFile();
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    // Subtest 5: a file with a lot of errors
648
    // A previous file with a lot of errors.
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    astr = "1,\n2,\n3,\n4,\n5,\n6,\n7,\n7,\n8,\n9,\n10,\n";
    test_str = v6_hdr_ + astr + astr + astr + astr + astr +
               astr + astr + astr + astr + astr + astr;
652
    writeFile(xstr_, test_str);
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    // No copy file

    // Run the cleanup, the file should fail but we should
    // catch the error and properly cleanup.
658
    launch(lfc_controller, argc, argv);
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    // And we shouldn't have deleted the previous file.
    // We also verify none of the temp or pid files remain.
    EXPECT_EQ(readFile(xstr_), test_str);
    EXPECT_TRUE(noExistIOFP());
664
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}

666
} // end of anonymous namespace