Source code for apache_beam.testing.test_utils

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"""Utility methods for testing

For internal use only; no backwards-compatibility guarantees.

import hashlib
import imp

from mock import Mock
from mock import patch

from import FileSystems
from apache_beam.utils import retry


[docs]def compute_hash(content, hashing_alg=DEFAULT_HASHING_ALG): """Compute a hash value from a list of string.""" content.sort() m = for elem in content: m.update(str(elem)) return m.hexdigest()
[docs]def patch_retry(testcase, module): """A function to patch retry module to use mock clock and logger. Clock and logger that defined in retry decorator will be replaced in test in order to skip sleep phase when retry happens. Args: testcase: An instance of unittest.TestCase that calls this function to patch retry module. module: The module that uses retry and need to be replaced with mock clock and logger in test. """ real_retry_with_exponential_backoff = retry.with_exponential_backoff def patched_retry_with_exponential_backoff(num_retries, retry_filter): """A patch for retry decorator to use a mock dummy clock and logger.""" return real_retry_with_exponential_backoff( num_retries=num_retries, retry_filter=retry_filter, logger=Mock(), clock=Mock()) patch.object(retry, 'with_exponential_backoff', side_effect=patched_retry_with_exponential_backoff).start() # Reload module after patching. imp.reload(module) def remove_patches(): patch.stopall() # Reload module again after removing patch. imp.reload(module) testcase.addCleanup(remove_patches)
@retry.with_exponential_backoff( num_retries=3, retry_filter=retry.retry_on_beam_io_error_filter) def delete_files(file_paths): """A function to clean up files or directories using ``FileSystems``. Glob is supported in file path and directories will be deleted recursively. Args: file_paths: A list of strings contains file paths or directories. """ if len(file_paths) == 0: raise RuntimeError('Clean up failed. Invalid file path: %s.' % file_paths) FileSystems.delete(file_paths)