ejochman 12c0b33cf1 Buffer unittests to avoid output to build log (#1070) ...

Requires use of a context manager within each test method for stdout/stderr patches, rather than the @patch.object decorator. Otherwise, the test runner hijacks the patched object before the method under test can use it.

Note: The `--buffer` switch in the unittest module will suppress all
output during the test, unless the test fails. However, with this implementation, anything that would have been printed to the streams within
the context manager will not be reflected in the test runner's output,
should the test fail.

See more in jay0lee/GAM#1068

2020-01-04 13:24:07 -05:00

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