[2980] Added runUnload tests

runUnload() still has to be added.

configure.ac

@@ -1403,6 +1403,7 @@ AC_OUTPUT([doc/version.ent
            src/lib/cc/tests/session_unittests_config.h
            src/lib/datasrc/datasrc_config.h.pre
            src/lib/hooks/tests/library_manager_unittest.cc
+           src/lib/hooks/tests/marker_file.h
            src/lib/log/tests/console_test.sh
            src/lib/log/tests/destination_test.sh
            src/lib/log/tests/init_logger_test.sh

src/lib/hooks/library_manager.h

@@ -164,6 +164,15 @@ protected:
     ///         have been output.
     bool runLoad();
 
+    /// @brief Run the unload function if present
+    ///
+    /// Searches for the "unload" framework function and, if present, runs it.
+    ///
+    /// @return bool true if not found or found and run successfully,
+    ///         false on an error.  In this case, an error message will
+    ///         have been output.
+    bool runUnload() {return false;}
+
 private:
     void*       dl_handle_;     ///< Handle returned by dlopen
     int         index_;         ///< Index associated with this library

src/lib/hooks/tests/Makefile.am

@@ -24,8 +24,11 @@ CLEANFILES = *.gcno *.gcda
 TESTS_ENVIRONMENT = \
 	$(LIBTOOL) --mode=execute $(VALGRIND_COMMAND)
 
+TESTS =
+if HAVE_GTEST
 # Build shared libraries for testing.
-lib_LTLIBRARIES = libnvl.la libivl.la libbcl.la liblcl.la liblecl.la
+lib_LTLIBRARIES = libnvl.la libivl.la libbcl.la liblcl.la liblecl.la \
+                  libucl.la
  
 # No version function
 libnvl_la_SOURCES  = no_version_library.cc
@@ -53,8 +56,12 @@ liblecl_la_SOURCES  = load_error_callout_library.cc
 liblecl_la_CXXFLAGS = $(AM_CXXFLAGS)
 liblecl_la_CPPFLAGS = $(AM_CPPFLAGS) $(LOG4CPLUS_INCLUDES)
 
-TESTS =
-if HAVE_GTEST
+# The unload callout library - contains an unload function that
+# creates a marker file.
+libucl_la_SOURCES  = unload_callout_library.cc
+libucl_la_CXXFLAGS = $(AM_CXXFLAGS)
+libucl_la_CPPFLAGS = $(AM_CPPFLAGS) $(LOG4CPLUS_INCLUDES)
+
 TESTS += run_unittests
 run_unittests_SOURCES  = run_unittests.cc
 run_unittests_SOURCES += callout_handle_unittest.cc
@@ -75,3 +82,5 @@ run_unittests_LDADD += $(top_builddir)/src/lib/util/unittests/libutil_unittests.
 endif
 
 noinst_PROGRAMS = $(TESTS)
+
+EXTRA_DIST = library_manager_unittest.cc.in marker_file.h.in

src/lib/hooks/tests/library_manager_unittest.cc.in

@@ -16,14 +16,16 @@
 #include <hooks/callout_manager.h>
 #include <hooks/library_manager.h>
 #include <hooks/server_hooks.h>
+#include <hooks/tests/marker_file.h>
 
 #include <gtest/gtest.h>
 
 #include <algorithm>
+#include <fstream>
 #include <string>
-#include <vector>
 
-#include <iostream>
+#include <unistd.h>
+
 
 using namespace isc;
 using namespace isc::hooks;
@@ -52,6 +54,16 @@ public:
 
         // Set up the callout handle.
         callout_handle_.reset(new CalloutHandle(callout_manager_));
+
+        // Ensure the marker file is not present
+        static_cast<void>(unlink(MARKER_FILE));
+    }
+
+    /// @brief Destructor
+    ///
+    /// Ensures a marker file is removed after the test.
+    ~LibraryManagerTest() {
+        static_cast<void>(unlink(MARKER_FILE));
     }
 
     /// Hook indexes.  These are somewhat ubiquitous, so are made public for
@@ -102,6 +114,7 @@ public:
     using LibraryManager::checkVersion;
     using LibraryManager::registerStandardCallouts;
     using LibraryManager::runLoad;
+    using LibraryManager::runUnload;
 };
 
 // Names of the libraries used in these tests.  These libraries are built using
@@ -115,6 +128,7 @@ static const char* LOAD_ERROR_CALLOUT_LIBRARY =
     "@abs_builddir@/.libs/liblecl.so";
 static const char* NOT_PRESENT_LIBRARY = "@abs_builddir@/.libs/libnothere.so";
 static const char* NO_VERSION_LIBRARY = "@abs_builddir@/.libs/libnvl.so";
+static const char* UNLOAD_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libucl.so";
 
 
 namespace {
@@ -327,4 +341,84 @@ TEST_F(LibraryManagerTest, CheckLoadError) {
     EXPECT_TRUE(lib_manager.closeLibrary());
 }
 
+// TODO Check that unload is called.  This causes problems with testing
+// in that it can't communicate anything back to the caller.  So we'll
+// test a successful call by checking whether a marker file is created.
+
+// No unload function
+
+TEST_F(LibraryManagerTest, CheckNoUnload) {
+
+    // Load the only library, specifying the index of 0 as it's the only
+    // library.  This should load all callouts.
+    PublicLibraryManager lib_manager(std::string(BASIC_CALLOUT_LIBRARY),
+                                     0, callout_manager_);
+    EXPECT_TRUE(lib_manager.openLibrary());
+
+    // Check that no unload function returns true.
+    EXPECT_TRUE(lib_manager.runUnload());
+
+    // Explicitly clear the callout_handle_ so that we can delete the library.
+    // This is the only object to contain memory allocated by it.
+    callout_handle_.reset();
+
+    // Tidy up
+    EXPECT_TRUE(lib_manager.closeLibrary());
+}
+
+// Unload function returns an error
+
+TEST_F(LibraryManagerTest, CheckUnloadError) {
+
+    // Load the only library, specifying the index of 0 as it's the only
+    // library.  This should load all callouts.
+    PublicLibraryManager lib_manager(std::string(LOAD_ERROR_CALLOUT_LIBRARY),
+                                     0, callout_manager_);
+    EXPECT_TRUE(lib_manager.openLibrary());
+
+    // Check that unload function returning an error returns false.
+    EXPECT_FALSE(lib_manager.runUnload());
+
+    // Explicitly clear the callout_handle_ so that we can delete the library.
+    // This is the only object to contain memory allocated by it.
+    callout_handle_.reset();
+
+    // Tidy up
+    EXPECT_TRUE(lib_manager.closeLibrary());
+}
+
+// Unload function works
+
+TEST_F(LibraryManagerTest, CheckUnload) {
+
+    // Load the only library, specifying the index of 0 as it's the only
+    // library.  This should load all callouts.
+    PublicLibraryManager lib_manager(std::string(UNLOAD_CALLOUT_LIBRARY),
+                                     0, callout_manager_);
+    EXPECT_TRUE(lib_manager.openLibrary());
+
+    // Check that the marker file is not present (at least that the file
+    // open fails).
+    fstream marker;
+    marker.open(MARKER_FILE, fstream::in);
+    EXPECT_TRUE(marker.fail());
+
+    // Check that unload function runs and returns a success
+    EXPECT_TRUE(lib_manager.runUnload());
+
+    // Check that the open succeeded
+    marker.open(MARKER_FILE, fstream::in);
+    EXPECT_TRUE(marker.is_open());
+
+    // Tidy up
+    marker.close();
+
+    // Explicitly clear the callout_handle_ so that we can delete the library.
+    // This is the only object to contain memory allocated by it.
+    callout_handle_.reset();
+
+    // Tidy up
+    EXPECT_TRUE(lib_manager.closeLibrary());
+}
+
 } // Anonymous namespace

src/lib/hooks/tests/load_error_callout_library.cc

@@ -20,8 +20,8 @@
 ///
 /// The characteristics of this library are:
 ///
-/// - The "version" and "load" framework functions are supplied.  "version"
-///   returns the correct value, but "load" returns an error.
+/// - All framework functions are supplied.  "version" returns the correct
+///   value, but "load" and unload return an error.
 
 #include <hooks/hooks.h>
 #include <iostream>
@@ -37,7 +37,13 @@ version() {
     return (BIND10_HOOKS_VERSION);
 }
 
-int load(LibraryHandle&) {
+int
+load(LibraryHandle&) {
+    return (1);
+}
+
+int
+unload() {
     return (1);
 }
 

src/lib/hooks/tests/marker_file.h.in

+// Copyright (C) 2013  Internet Systems Consortium, Inc. ("ISC")
+//
+// 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.
+
+#ifndef MARKER_FILE_H
+#define MARKER_FILE_H
+
+/// @file
+/// Define a marker file that is used in tests to prove that an "unload"
+/// function has been called.
+
+namespace {
+const char* MARKER_FILE = "@abs_builddir@/marker_file.dat";
+}
+
+#endif // MARKER_FILE_H
+

src/lib/hooks/tests/unload_callout_library.cc

+// Copyright (C) 2013  Internet Systems Consortium, Inc. ("ISC")
+//
+// 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.
+
+/// @file
+/// @brief Basic unload library
+///
+/// This is a test file for the LibraryManager test.  It produces a library
+/// that allows for tests of the basic library manager functions.
+///
+/// The characteristics of this library are:
+///
+/// - The "version" and "unload" framework functions are supplied. "version"
+///   returns a valid value and "unload" creates a marker file and returns
+///   success.
+
+#include <hooks/hooks.h>
+#include <hooks/tests/marker_file.h>
+
+#include <fstream>
+
+using namespace isc::hooks;
+
+extern "C" {
+
+// Framework functions
+
+int
+version() {
+    return (BIND10_HOOKS_VERSION);
+}
+
+int unload() {
+    // Create the marker file.
+    std::fstream marker;
+    marker.open(MARKER_FILE, std::fstream::out);
+    marker.close();
+
+    return (0);
+}
+
+};
+