Add tests to CMake project

Related to https://github.com/xiph/vorbis/issues/73.
Signed-off-by: Ralph Giles <giles@thaumas.net>

.gitlab-ci.yml

@@ -25,3 +25,5 @@ cmake:
     - mkdir build
     - cmake -S . -B build -G "Ninja" -DCMAKE_BUILD_TYPE=Release
     - cmake --build build
+    - cd build
+    - ctest

CMakeLists.txt

@@ -4,6 +4,7 @@ project(vorbis)
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 # Required modules
+include(CTest)
 include(GNUInstallDirs)
 include(CheckIncludeFiles)
 include(CheckLibraryExists)
@@ -71,6 +72,10 @@ endif()
 
 add_subdirectory(lib)
 
+if(BUILD_TESTING)
+    add_subdirectory(test)
+endif()
+
 configure_pkg_config_file(vorbis.pc.in)
 configure_pkg_config_file(vorbisenc.pc.in)
 configure_pkg_config_file(vorbisfile.pc.in)

test/CMakeLists.txt

+add_executable(vorbis_test util.c util.h write_read.c write_read.h test.c)
+target_link_libraries(vorbis_test PRIVATE Vorbis::vorbisenc)
+add_test(NAME vorbis_test COMMAND vorbis_test)

test/Makefile.am

@@ -12,6 +12,8 @@ AM_CPPFLAGS = -I$(top_srcdir)/include @OGG_CFLAGS@
 test_SOURCES = util.c util.h write_read.c write_read.h test.c
 test_LDADD = ../lib/libvorbisenc.la ../lib/libvorbis.la @OGG_LIBS@ @VORBIS_LIBS@
 
+EXTRA_DIST = CMakeLists.txt
+
 debug:
 	$(MAKE) check CFLAGS="@DEBUG@"