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Make it easier to read assert_output failure by showing mismatched line rather than just mismatched length. Also, .format can't evaluate arbitrary Python

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Alex Hall 2019-04-25 20:57:43 +02:00 • committed by Ram Rachum
parent 93edf6fced
commit d29cd6f464
1 changed files with 7 additions and 6 deletions
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13
tests/utils.py
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@ -226,11 +226,7 @@ class OutputFailure(Exception):
def assert_output(output, expected_entries, prefix=None):
lines = tuple(filter(None, output.split('\n')))
if len(lines) != len(expected_entries):
raise OutputFailure(
'Output has {len(lines)} lines, while we expect '
'{len(expected_entries)} lines.'.format(**locals())
)
if prefix is not None:
for line in lines:
if not line.startswith(prefix):
@ -240,4 +236,9 @@ def assert_output(output, expected_entries, prefix=None):
if not expected_entry.check(line):
raise OutputFailure(line)
if len(lines) != len(expected_entries):
raise OutputFailure(
'Output has {} lines, while we expect '
'{} lines.'.format(
len(lines), len(expected_entries))
)