end_to_end_test.py 文件源码

def test_generated_service_worker(self):
    """Tests that the generated service worker is as expected."""
    output_sw_path = os.path.join(self.output_dir, caterpillar.SW_SCRIPT_NAME)
    reference_sw_path = os.path.join(
        TTS_REFERENCE_PATH, caterpillar.SW_SCRIPT_NAME)

    with open(output_sw_path) as output_file:
      with open(reference_sw_path) as reference_file:
        output_data = output_file.read().decode('utf-8')
        reference_data = reference_file.read().decode('utf-8')

        # The cache version is randomly generated in the output service worker,
        # so reset it to be 0, the same cache version as the reference service
        # worker.
        output_data = re.sub(
            r'CACHE_VERSION = \d+', 'CACHE_VERSION = 0', output_data)

        self.assertEqual(output_data, reference_data,
            'Difference found in file `{}`.\n{}'.format(
                caterpillar.SW_SCRIPT_NAME,
                '\n'.join(difflib.unified_diff(
                    output_data.split('\n'),
                    reference_data.split('\n'),
                    fromfile=reference_sw_path,
                    tofile=output_sw_path,
                    n=0))))