(CMake) Add a new CMake option to enable the new Unit Tests

CMakeLists.txt

@@ -39,6 +39,7 @@ option( EXIV2_ENABLE_SSH              "USE Libssh for SshIo"
 option( EXIV2_BUILD_SAMPLES           "Build sample applications"                             ON  )
 option( EXIV2_BUILD_PO                "Build translations files"                              OFF )
 option( EXIV2_BUILD_EXIV2_COMMAND     "Build exiv2 command-line executable"                   ON  )
+option( EXIV2_BUILD_UNIT_TESTS        "Build unit tests"                                      OFF )
 
 if ( EXIV2_ENABLE_WEBREADY )
     set ( EXIV2_ENABLE_CURL ON )
@@ -69,6 +70,10 @@ if( EXIV2_ENABLE_XMP )
 endif()
 add_subdirectory( src )
 
+if( EXIV2_BUILD_UNIT_TESTS )
+    add_subdirectory ( unitTests )
+endif()
+
 if( EXIV2_BUILD_SAMPLES )
     add_subdirectory( samples )
 endif()

config/findDependencies.cmake

@@ -64,3 +64,7 @@ if(CCACHE_FOUND)
     set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
     set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
 endif()
+
+if (EXIV2_BUILD_UNIT_TESTS)
+    find_package(GTest REQUIRED)
+endif()

config/printSummary.cmake

@@ -40,6 +40,7 @@ endif()
 OptionOutput( "Building exiv2 command:             " EXIV2_BUILD_EXIV2_COMMAND       )
 OptionOutput( "Building samples:                   " EXIV2_BUILD_SAMPLES             )
 OptionOutput( "Building PO files:                  " EXIV2_BUILD_PO                  )
+OptionOutput( "Building unit tests:                " EXIV2_BUILD_UNIT_TESTS          )
 
 
 message( STATUS "------------------------------------------------------------------" )

unitTests/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_executable(unit_tests mainTestRunner.cpp
+    test_types.cpp
+)
+
+target_link_libraries(unit_tests 
+    PRIVATE
+        exiv2lib
+        GTest::GTest
+)

unitTests/mainTestRunner.cpp

@@ -0,0 +1,14 @@
+#include <gtest/gtest.h>
+
+#include <iostream>
+
+int main(int argc, char** argv)
+{
+    ::testing::InitGoogleTest(&argc, argv);
+
+    int ret = RUN_ALL_TESTS();
+
+    std::cout << "Tests finished with return value: " << ret << std::endl;
+
+    return EXIT_SUCCESS;
+}

unitTests/test_types.cpp

@@ -0,0 +1,11 @@
+#include <gtest/gtest.h>
+#include <exiv2/types.hpp>
+
+using namespace Exiv2;
+
+TEST(ExivTime, getsTimeFromValidString)
+{
+    struct tm tmInstance;
+    ASSERT_EQ(0, exifTime("2007:05:24 12:31:55", &tmInstance));
+    /// \todo add more checks here
+}