sdk/cwl/tests/matcher.py

   1 import difflib
   2 import json
   3
   4
   5 class JsonDiffMatcher(object):
   6     """Raise AssertionError with a readable JSON diff when not __eq__().
   7
   8     Used with assert_called_with() so it's possible for a human to see
   9     the differences between expected and actual call arguments that
  10     include non-trivial data structures.
  11     """
  12     def __init__(self, expected):
  13         self.expected = expected
  14
  15     def __eq__(self, actual):
  16         expected_json = json.dumps(self.expected, sort_keys=True, indent=2)
  17         actual_json = json.dumps(actual, sort_keys=True, indent=2)
  18         if expected_json != actual_json:
  19             raise AssertionError("".join(difflib.context_diff(
  20                 expected_json.splitlines(1),
  21                 actual_json.splitlines(1),
  22                 fromfile="Expected", tofile="Actual")))
  23         return True