Method test_skip_source_first_line

tests/test_black.py:378–389

(self)

        black.assert_stable(source, not_normalized, mode=mode)

    def test_skip_source_first_line(self) -> None:
        source, _ = read_data("miscellaneous", "invalid_header")
        tmp_file = Path(black.dump_to_file(source))
        # Full source should fail (invalid syntax at header)
        self.invokeBlack([str(tmp_file), "--diff", "--check"], exit_code=123)
        # So, skipping the first line should work
        result = BlackRunner().invoke(
            black.main, [str(tmp_file), "-x", f"--config={EMPTY_CONFIG}"]
        )
        self.assertEqual(result.exit_code, 0)
        actual = tmp_file.read_text(encoding="utf-8")
        self.assertFormatEqual(source, actual)

    def test_skip_source_first_line_when_mixing_newlines(self) -> None:
        code_mixing_newlines = b"Header will be skipped\r\ni = [1,2,3]\nj = [1,2,3]\n"