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If called with the callable and arguments omitted, will return a
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with self.assertRaises(SomeException):
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An optional keyword argument 'msg' can be provided when assertRaises
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The context manager keeps a reference to the exception as
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zTestCase.assertRaisesc O s t || �}|jd||�S )a� Fail unless a warning of class warnClass is triggered
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The context manager keeps a reference to the first matching
warning as the 'warning' attribute; similarly, the 'filename'
and 'lineno' attributes give you information about the line
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a recording object with two attributes: `output` and `records`.
At the end of the context manager, the `output` attribute will
be a list of the matching formatted log messages and the
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objects.
Example::
with self.assertLogs('foo', level='INFO') as cm:
logging.getLogger('foo').info('first message')
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