mirror of https://github.com/python/cpython
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# helper module for test_runner.Test_TextTestRunner.test_warnings
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"""
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This module has a number of tests that raise different kinds of warnings.
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When the tests are run, the warnings are caught and their messages are printed
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to stdout. This module also accepts an arg that is then passed to
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unittest.main to affect the behavior of warnings.
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Test_TextTestRunner.test_warnings executes this script with different
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combinations of warnings args and -W flags and check that the output is correct.
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See #10535.
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"""
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import sys
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import unittest
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import warnings
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def warnfun():
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warnings.warn('rw', RuntimeWarning)
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class TestWarnings(unittest.TestCase):
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def test_other_unittest(self):
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self.assertAlmostEqual(2+2, 4)
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self.assertNotAlmostEqual(4+4, 2)
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# these warnings are normally silenced, but they are printed in unittest
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def test_deprecation(self):
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warnings.warn('dw', DeprecationWarning)
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warnings.warn('dw', DeprecationWarning)
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warnings.warn('dw', DeprecationWarning)
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def test_import(self):
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warnings.warn('iw', ImportWarning)
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warnings.warn('iw', ImportWarning)
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warnings.warn('iw', ImportWarning)
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# user warnings should always be printed
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def test_warning(self):
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warnings.warn('uw')
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warnings.warn('uw')
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warnings.warn('uw')
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# these warnings come from the same place; they will be printed
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# only once by default or three times if the 'always' filter is used
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def test_function(self):
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warnfun()
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warnfun()
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warnfun()
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if __name__ == '__main__':
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with warnings.catch_warnings(record=True) as ws:
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# if an arg is provided pass it to unittest.main as 'warnings'
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if len(sys.argv) == 2:
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unittest.main(exit=False, warnings=sys.argv.pop())
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else:
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unittest.main(exit=False)
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# print all the warning messages collected
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for w in ws:
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print(w.message)
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