[CMake] Declare remaining tests, and add a test output option. (#9705)

The new option will allow us to generate test XML output.

CTest can discover tests from googletest, but it generates one file
per case. We have several thousand cases, so one file each would be
far from optimal. The approach in this change will generate one file
per test (executable).

cmake/tests.cmake

@@ -1,5 +1,7 @@
 option(protobuf_USE_EXTERNAL_GTEST "Use external Google Test (i.e. not the one in third_party/googletest)" OFF)
 
+option(protobuf_TEST_XML_OUTDIR "Output directory for XML logs from tests." "")
+
 option(protobuf_ABSOLUTE_TEST_PLUGIN_PATH
   "Using absolute test_plugin path in tests" ON)
 mark_as_advanced(protobuf_ABSOLUTE_TEST_PLUGIN_PATH)
@@ -239,6 +241,13 @@ if(MINGW)
 
 endif()
 
+if(protobuf_TEST_XML_OUTDIR)
+  if(NOT "${protobuf_TEST_XML_OUTDIR}" MATCHES "[/\\]$")
+    string(APPEND protobuf_TEST_XML_OUTDIR "/")
+  endif()
+  set(protobuf_GTEST_ARGS "--gtest_output=xml:${protobuf_TEST_XML_OUTDIR}")
+endif()
+
 add_executable(tests ${tests_files})
 if (MSVC)
   target_compile_options(tests PRIVATE
@@ -263,17 +272,23 @@ set(lite_test_files
 add_executable(lite-test ${lite_test_files})
 target_link_libraries(lite-test protobuf-lite-test-common libprotobuf-lite GTest::gmock_main)
 
+add_test(NAME lite-test
+  COMMAND lite-test ${protobuf_GTEST_ARGS})
+
 set(lite_arena_test_files
   ${protobuf_SOURCE_DIR}/src/google/protobuf/lite_arena_unittest.cc
 )
 add_executable(lite-arena-test ${lite_arena_test_files})
 target_link_libraries(lite-arena-test protobuf-lite-test-common libprotobuf-lite GTest::gmock_main)
 
+add_test(NAME lite-arena-test
+  COMMAND lite-arena-test ${protobuf_GTEST_ARGS})
+
 add_custom_target(check
   COMMAND tests
   DEPENDS tests test_plugin
   WORKING_DIRECTORY ${protobuf_SOURCE_DIR})
 
 add_test(NAME check
-  COMMAND tests
+  COMMAND tests ${protobuf_GTEST_ARGS}
   WORKING_DIRECTORY "${protobuf_SOURCE_DIR}")