Python: fix failing tests when building bpy module

* Use Python executable from lib folder since it's not installed.
* Make bpy module test work for portable install.
* Disable gtests which don't work with different Python link flags
  and shared library locations.

Ref D15957

build_files/cmake/macros.cmake

@@ -418,6 +418,13 @@ function(blender_add_test_lib
   library_deps
   )
 
+  # Not currently supported for Python module due to different required
+  # Python link flags.
+  if(WITH_PYTHON_MODULE)
+    add_custom_target(${name})
+    return()
+  endif()
+
   add_cc_flags_custom_test(${name} PARENT_SCOPE)
 
   # Otherwise external projects will produce warnings that we cannot fix.
@@ -464,6 +471,13 @@ function(blender_add_test_executable
   library_deps
   )
 
+  # Not currently supported for Python module due to different required
+  # Python link flags.
+  if(WITH_PYTHON_MODULE)
+    add_custom_target(${name})
+    return()
+  endif()
+
   add_cc_flags_custom_test(${name} PARENT_SCOPE)
 
   ## Otherwise external projects will produce warnings that we cannot fix.

build_files/cmake/platform/platform_win32.cmake

@@ -510,6 +510,8 @@ if(WITH_PYTHON)
   set(PYTHON_LIBRARY ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/libs/python${_PYTHON_VERSION_NO_DOTS}.lib)
   set(PYTHON_LIBRARY_DEBUG ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/libs/python${_PYTHON_VERSION_NO_DOTS}_d.lib)
 
+  set(PYTHON_EXECUTABLE ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python$<$<CONFIG:Debug>:_d>.exe)
+
   set(PYTHON_INCLUDE_DIR ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/include)
   set(PYTHON_NUMPY_INCLUDE_DIRS ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/lib/site-packages/numpy/core/include)
   set(NUMPY_FOUND ON)

tests/CMakeLists.txt

@@ -10,29 +10,25 @@ set(TEST_INSTALL_DIR ${CMAKE_INSTALL_PREFIX_WITH_CONFIG})
 # Path to Blender and Python executables for all platforms.
 if(MSVC)
   set(TEST_BLENDER_EXE ${TEST_INSTALL_DIR}/blender.exe)
-  set(_default_test_python_exe "${TEST_INSTALL_DIR}/${BLENDER_VERSION_MAJOR}.${BLENDER_VERSION_MINOR}/python/bin/python$<$<CONFIG:Debug>:_d>")
 elseif(APPLE)
   set(TEST_BLENDER_EXE ${TEST_INSTALL_DIR}/Blender.app/Contents/MacOS/Blender)
-  set(_default_test_python_exe ${PYTHON_EXECUTABLE})
 else()
   if(WITH_INSTALL_PORTABLE)
     set(TEST_BLENDER_EXE ${TEST_INSTALL_DIR}/blender)
   else()
     set(TEST_BLENDER_EXE ${TEST_INSTALL_DIR}/bin/blender)
   endif()
-  set(_default_test_python_exe ${PYTHON_EXECUTABLE})
 endif()
 
 # The installation directory's Python is the best one to use. However, it can only be there after the install step,
 # which means that Python will never be there on a fresh system. To suit different needs, the user can pass
 # -DTEST_PYTHON_EXE=/path/to/python to CMake.
 if(NOT TEST_PYTHON_EXE)
-  set(TEST_PYTHON_EXE ${_default_test_python_exe})
+  set(TEST_PYTHON_EXE ${PYTHON_EXECUTABLE})
   message(STATUS "Tests: Using Python executable: ${TEST_PYTHON_EXE}")
 elseif(NOT EXISTS ${TEST_PYTHON_EXE})
   message(FATAL_ERROR "Tests: TEST_PYTHON_EXE ${TEST_PYTHON_EXE} does not exist")
 endif()
-unset(_default_test_python_exe)
 
 
 # For testing with Valgrind

tests/blender_as_python_module/CMakeLists.txt

@@ -12,4 +12,4 @@ function(add_blender_as_python_module_test testname testscript)
   )
 endfunction()
 
-add_blender_as_python_module_test(import_bpy ${CMAKE_CURRENT_LIST_DIR}/import_bpy.py)
+add_blender_as_python_module_test(import_bpy ${CMAKE_CURRENT_LIST_DIR}/import_bpy.py ${CMAKE_INSTALL_PREFIX_WITH_CONFIG})

tests/blender_as_python_module/import_bpy.py

@@ -1,4 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
+# Add directory with module to the path.
+import sys
+sys.path.append(sys.argv[1])
+
 # Just import bpy and see if there are any dynamic loader errors.
 import bpy