[issue21692] Wrong order of expected/actual for assert_called_once_with

[Fei Long Wang]

Fei Long Wang added the comment:

IMHO, the trace should be:

AssertionError: Expected call: some_method('foo', 'bar')   
Actual call: some_method('foo', 'baz')                    

instead of below:

AssertionError: Expected call: some_method('foo', 'baz')   
Actual call: some_method('foo', 'bar')

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21692>
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