Tests: add option to build one binary per GTest file

Bundling many tests in a single binary reduces build time and disk space
usage, but is less convenient for running individual tests command line
as filter flags need to be used.

This adds WITH_TESTS_SINGLE_BINARY to generate one executable file per
source file. Note that enabling this option requires a significant amount
of disk space.

Due to refactoring, the resulting ctest names are a bit different than
before. The number of tests is also a bit different depending if this
option is used, as one uses gtests discovery and the other is organized
purely by filename, which isn't always 1:1.

Co-authored-by: Sergey Sharybin <sergey@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/114604

tests/python/CMakeLists.txt

@@ -702,7 +702,7 @@ if(WITH_CYCLES OR WITH_GPU_RENDER_TESTS)
       # Eevee
       foreach(render_test ${render_tests})
         add_render_test(
-          eevee_${render_test}_test
+          eevee_${render_test}
           ${CMAKE_CURRENT_LIST_DIR}/eevee_render_tests.py
           -testdir "${TEST_SRC_DIR}/render/${render_test}"
           -outdir "${TEST_OUT_DIR}/eevee"
@@ -712,7 +712,7 @@ if(WITH_CYCLES OR WITH_GPU_RENDER_TESTS)
       # Eevee Next
       foreach(render_test ${render_tests})
         add_render_test(
-          eevee_next_${render_test}_test
+          eevee_next_${render_test}
           ${CMAKE_CURRENT_LIST_DIR}/eevee_next_render_tests.py
           -testdir "${TEST_SRC_DIR}/render/${render_test}"
           -outdir "${TEST_OUT_DIR}/eevee_next"
@@ -722,7 +722,7 @@ if(WITH_CYCLES OR WITH_GPU_RENDER_TESTS)
       foreach(render_test ${render_tests})
         # Workbench
         add_render_test(
-          workbench_${render_test}_test
+          workbench_${render_test}
           ${CMAKE_CURRENT_LIST_DIR}/workbench_render_tests.py
           -testdir "${TEST_SRC_DIR}/render/${render_test}"
           -outdir "${TEST_OUT_DIR}/workbench"
@@ -733,7 +733,7 @@ if(WITH_CYCLES OR WITH_GPU_RENDER_TESTS)
         # Hydra Storm
         foreach(render_test ${render_tests})
           add_render_test(
-            storm_hydra_${render_test}_test
+            storm_hydra_${render_test}
             ${CMAKE_CURRENT_LIST_DIR}/storm_render_tests.py
             -testdir "${TEST_SRC_DIR}/render/${render_test}"
             -outdir "${TEST_OUT_DIR}/storm_hydra"
@@ -743,7 +743,7 @@ if(WITH_CYCLES OR WITH_GPU_RENDER_TESTS)
 
         foreach(render_test ${render_tests})
           add_render_test(
-            storm_usd_${render_test}_test
+            storm_usd_${render_test}
             ${CMAKE_CURRENT_LIST_DIR}/storm_render_tests.py
             -testdir "${TEST_SRC_DIR}/render/${render_test}"
             -outdir "${TEST_OUT_DIR}/storm_usd"
@@ -776,7 +776,7 @@ if(WITH_COMPOSITOR_CPU)
 
     foreach(comp_test ${compositor_tests})
       add_render_test(
-        compositor_${comp_test}_cpu_test
+        compositor_${comp_test}_cpu
         ${CMAKE_CURRENT_LIST_DIR}/compositor_cpu_render_tests.py
         -testdir "${TEST_SRC_DIR}/compositor/${comp_test}"
         -outdir "${TEST_OUT_DIR}/compositor_cpu"
@@ -808,7 +808,7 @@ if(WITH_COMPOSITOR_REALTIME_TESTS AND WITH_COMPOSITOR_CPU)
 
     foreach(comp_test ${compositor_tests})
       add_render_test(
-        compositor_${comp_test}_realtime_test
+        compositor_${comp_test}_realtime
         ${CMAKE_CURRENT_LIST_DIR}/compositor_realtime_render_tests.py
         -testdir "${TEST_SRC_DIR}/compositor/${comp_test}"
         -outdir "${TEST_OUT_DIR}/compositor_realtime"
@@ -853,7 +853,7 @@ foreach(geo_node_test ${geo_node_tests})
     foreach(file ${files})
       get_filename_component(filename ${file} NAME_WE)
       add_blender_test(
-        geo_node_${geo_node_test}_test_${filename}
+        geo_node_${geo_node_test}_${filename}
         ${file}
         --python ${TEST_PYTHON_DIR}/geo_node_test.py
       )
@@ -915,7 +915,7 @@ if(WITH_ALEMBIC)
   get_filename_component(ALEMBIC_ROOT_DIR ${real_include_dir} DIRECTORY)
 
   add_python_test(
-    bf_io_alembic_export_tests
+    io_alembic_export_tests
     ${CMAKE_CURRENT_LIST_DIR}/alembic_export_tests.py
     --blender "${TEST_BLENDER_EXE}"
     --testdir "${TEST_SRC_DIR}/alembic"
@@ -932,13 +932,13 @@ endif()
 
 if(WITH_USD)
   add_blender_test(
-    bf_io_usd_export_test
+    io_usd_export
     --python ${CMAKE_CURRENT_LIST_DIR}/bl_usd_export_test.py
     --
     --testdir "${TEST_SRC_DIR}/usd"
   )
   add_blender_test(
-    bf_io_usd_import_test
+    io_usd_import
     --python ${CMAKE_CURRENT_LIST_DIR}/bl_usd_import_test.py
     --
     --testdir "${TEST_SRC_DIR}/usd"
@@ -972,7 +972,7 @@ else()
   endif()
 
   add_blender_test(
-    bf_imbuf_save
+    imbuf_save
     --python ${CMAKE_CURRENT_LIST_DIR}/bl_imbuf_save.py
     --
     -test_dir "${TEST_SRC_DIR}/imbuf_io"
@@ -982,7 +982,7 @@ else()
   )
 
   add_blender_test(
-    bf_imbuf_load
+    imbuf_load
     --python ${CMAKE_CURRENT_LIST_DIR}/bl_imbuf_load.py
     --
     -test_dir "${TEST_SRC_DIR}/imbuf_io"
@@ -1038,7 +1038,7 @@ if(WITH_UI_TESTS)
   )
   foreach(ui_test ${_undo_tests})
     add_blender_test_headless(
-      "bf_ui_${ui_test}"
+      "ui_${ui_test}"
       --enable-event-simulate
       --python "${CMAKE_CURRENT_LIST_DIR}/ui_simulate/run_blender_setup.py"
       --