T73268: Link C/C++ unit tests into single executable

This commit introduces a new way to build unit tests. It is now possible
for each module to generate its own test library. The tests in these
libraries are then bundled into a single executable.

The test executable can be run with `ctest`. Even though the tests
reside in a single executable, they are still exposed as individual
tests to `ctest`, and thus can be selected via its `-R` argument.

Not yet ported tests still build & run as before.

The following rules apply:

- Test code should reside in the same directory as the code under test.
- Tests that target functionality in `somefile.{c,cc}` should reside in
  `somefile_test.cc`.
- The namespace for tests is the `tests` sub-namespace of the code under
  test. For example, tests for `blender::bke` should be in
  `blender::bke:tests`.
- The test files should be listed in the module's `CMakeLists.txt` in a
  `blender_add_test_lib()` call. See the `blenkernel` module for an
  example.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7649

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/blenkernel/CMakeLists.txt b/source/blender/blenkernel/CMakeLists.txt
index 25710ef29ca..97a283abbfb 100644
--- a/source/blender/blenkernel/CMakeLists.txt
+++ b/source/blender/blenkernel/CMakeLists.txt
@@ -701,3 +701,16 @@ blender_add_lib(bf_blenkernel "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
 
 # Needed so we can use dna_type_offsets.h for defaults initialization.
 add_dependencies(bf_blenkernel bf_dna)
+
+
+if(WITH_GTESTS)
+  set(TEST_SRC
+    intern/armature_test.cc
+    intern/fcurve_test.cc
+  )
+  set(TEST_INC
+    ../editors/include
+  )
+  include(GTestTesting)
+  blender_add_test_lib(bf_blenkernel_tests "${TEST_SRC}" "${INC};${TEST_INC}" "${INC_SYS}" "${LIB}")
+endif()