debug stderr

Author: praiskup

tests/test_patch_git_preparation.py

@@ -20,6 +20,12 @@ def test_patch_git_prep():
         tmp_path = Path(tmp_dir)
         commit = "c8d343a3ff7f6be17ff1d0dd7f89d06845c0a18b"
         subprocess.run([str(script_path), commit], cwd=tmp_path, check=True)
+        r = subprocess.run([str(script_path), commit], cwd=tmp_path,
+                           capture_output=True, text=True, check=False)
+        if r.returncode:
+            print(f"Command errored:\n{r.stderr}")
+            r.check_returncode()
+
         generated_file = tmp_path / "patch-git-generated-log.txt"
         actual_content = generated_file.read_text()
         expected_content = expected_file.read_text()