Function test_merge_json_files_unparseable_existing

tests/test_merge.py:120–125

If the existing file is unparseable JSON, return None to avoid overwriting it.

(tmp_path)

    assert merge_json_files(existing_file, ["not", "a", "dict"]) is None

def test_merge_json_files_unparseable_existing(tmp_path):
    """If the existing file is unparseable JSON, return None to avoid overwriting it."""
    bad_file = tmp_path / "bad.json"
    bad_file.write_text('{"a": 1, missing_value}') # Invalid JSON
    
    assert merge_json_files(bad_file, {"b": 2}) is None


def test_merge_json_files_list_preservation(tmp_path):