Tests: Add tests for FindGTest

Tests/CMakeLists.txt

@@ -1362,6 +1362,11 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
   if(CMake_TEST_FindGSL)
     add_subdirectory(FindGSL)
   endif()
+
+  if(CMake_TEST_FindGTest)
+    add_subdirectory(FindGTest)
+  endif()
+
   if(CMake_TEST_FindJsonCpp)
     add_subdirectory(FindJsonCpp)
   endif()

Tests/FindGTest/CMakeLists.txt

@@ -0,0 +1,10 @@
+add_test(NAME FindGTest.Test COMMAND
+  ${CMAKE_CTEST_COMMAND} -C $<CONFIGURATION>
+  --build-and-test
+  "${CMake_SOURCE_DIR}/Tests/FindGTest/Test"
+  "${CMake_BINARY_DIR}/Tests/FindGTest/Test"
+  ${build_generator_args}
+  --build-project TestFindGTest
+  --build-options ${build_options}
+  --test-command ${CMAKE_CTEST_COMMAND} -V -C $<CONFIGURATION>
+  )

Tests/FindGTest/Test/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.1)
+project(TestFindGTest CXX)
+include(CTest)
+
+# CMake does not actually provide FindGTest publicly.
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../../Source/Modules)
+
+find_package(GTest REQUIRED)
+
+add_executable(test_gtest_tgt main.cxx)
+target_link_libraries(test_gtest_tgt GTest::Main)
+add_test(NAME test_gtest_tgt COMMAND test_gtest_tgt)
+
+add_executable(test_gtest_var main.cxx)
+target_include_directories(test_gtest_var PRIVATE ${GTEST_INCLUDE_DIRS})
+target_link_libraries(test_gtest_var PRIVATE ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
+add_test(NAME test_gtest_var COMMAND test_gtest_var)

Tests/FindGTest/Test/main.cxx

@@ -0,0 +1,6 @@
+#include <gtest/gtest.h>
+
+TEST(FindCMake, LinksAndRuns)
+{
+  ASSERT_TRUE(true);
+}