22 lines
785 B
Python
22 lines
785 B
Python
from __future__ import print_function
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from difflib import unified_diff
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def report_collection_diff(from_collection, to_collection, from_id, to_id):
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"""Report the collected test difference between two nodes.
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:returns: detailed message describing the difference between the given
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collections, or None if they are equal.
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"""
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if from_collection == to_collection:
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return None
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diff = unified_diff(from_collection, to_collection, fromfile=from_id, tofile=to_id)
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error_message = (
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u"Different tests were collected between {from_id} and {to_id}. "
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u"The difference is:\n"
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u"{diff}"
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).format(from_id=from_id, to_id=to_id, diff="\n".join(diff))
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msg = "\n".join([x.rstrip() for x in error_message.split("\n")])
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return msg
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