ci: add basic test pipeline for shader builders

tests/python_build/conftest.py

@@ -0,0 +1,26 @@
+import os
+import sys
+from pathlib import Path
+
+import pytest
+
+CWD = Path(__file__).parent
+ROOT = CWD.parent.parent
+# append directory with build files to sys.path to import them
+sys.path.append(str(ROOT))
+
+
+@pytest.fixture
+def shader_files(request):
+    shader_path = request.param
+
+    res = {
+        "path_input": str(CWD / "fixtures" / f"{shader_path}.glsl"),
+        "path_output": str(CWD / "fixtures" / f"{shader_path}.glsl.gen.h"),
+        "path_expected_full": str(CWD / "fixtures" / f"{shader_path}_expected_full.glsl"),
+        "path_expected_parts": str(CWD / "fixtures" / f"{shader_path}_expected_parts.json"),
+    }
+    yield res
+
+    if not os.getenv("PYTEST_KEEP_GENERATED_FILES"):
+        os.remove(res["path_output"])