Make tests work with CTest (#1539)

Adds option to disable non-free tests

test/CMakeLists.txt

@@ -1,13 +1,18 @@
 # SPDX-License-Identifier: MIT
 
+OPTION(USE_NONFREE_TESTS "run tests that build nonfree codebases" ON)
+
+if(NOT USE_NONFREE_TESTS)
+  set(ONLY_FREE "--only-free")
+endif()
+
 add_executable(randtilegen gfx/randtilegen.cpp)
 add_executable(rgbgfx_test gfx/rgbgfx_test.cpp)
+set_target_properties(randtilegen rgbgfx_test PROPERTIES
+# hack for MSVC: no-op generator expression to stop generation of "per-configuration subdirectory"
+                      RUNTIME_OUTPUT_DIRECTORY $<1:${CMAKE_CURRENT_SOURCE_DIR}/gfx>)
 
-install(TARGETS randtilegen rgbgfx_test
-        DESTINATION ${rgbds_SOURCE_DIR}/test/gfx
-        COMPONENT "Test support programs"
-        EXCLUDE_FROM_ALL
-        )
+configure_file(CTestCustom.cmake.in ${CMAKE_BINARY_DIR}/CTestCustom.cmake)
 
 foreach(TARGET randtilegen rgbgfx_test)
   if(LIBPNG_FOUND) # pkg-config
@@ -20,3 +25,8 @@ foreach(TARGET randtilegen rgbgfx_test)
     target_link_libraries(${TARGET} PRIVATE ${PNG_LIBRARIES})
   endif()
 endforeach()
+
+add_test(NAME all
+         COMMAND ./run-tests.sh ${ONLY_FREE}
+         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)

test/CTestCustom.cmake.in

@@ -0,0 +1 @@
+set(CTEST_CUSTOM_PRE_TEST "bash -c 'cd @CMAKE_CURRENT_SOURCE_DIR@\; ./fetch-test-deps.sh @ONLY_FREE@'")