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29
30"""Unit test utilities for gtest_json_output."""
31
32import re
33
34
35def normalize(obj):
36  """Normalize output object.
37
38  Args:
39     obj: Google Test's JSON output object to normalize.
40
41  Returns:
42     Normalized output without any references to transient information that may
43     change from run to run.
44  """
45
46  def _normalize(key, value):
47    if key == 'time':
48      return re.sub(r'^\d+(\.\d+)?s$', '*', value)
49    elif key == 'timestamp':
50      return re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\dZ$', '*', value)
51    elif key == 'failure':
52      value = re.sub(r'^.*[/\\](.*:)\d+\n', '\\1*\n', value)
53      return re.sub(r'Stack trace:\n(.|\n)*', 'Stack trace:\n*', value)
54    elif key == 'file':
55      return re.sub(r'^.*[/\\](.*)', '\\1', value)
56    else:
57      return normalize(value)
58
59  if isinstance(obj, dict):
60    return {k: _normalize(k, v) for k, v in obj.items()}
61  if isinstance(obj, list):
62    return [normalize(x) for x in obj]
63  else:
64    return obj
65