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Tests for Trial's interaction with the Python warning system.
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A test case which is used by L{FlushWarningsTests} to verify behavior
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Generate a warning and don't flush it.
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Generate a warning and flush it.
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Tests for C{flushWarnings}, an API for examining the warnings
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For each pair of corresponding elements in C{sets} and C{subsets},
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Verify that warnings emitted at the very edges of a function are still
determined to be emitted from that function.
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since it was initially compiled can still be flushed.
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unfortunate behavior of CPython to write a .py source file name into
the .pyc files it generates and then trust that it is correct in
various places. If source files are renamed, .pyc files may not be
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In Python 3.6 the dis.findlinestarts documented behaviour
was changed such that the reported lines might not be sorted ascending.
In Python 3.10 PEP 626 introduced byte-code change such that the last
line of a function wasn't always associated with the last byte-code.
In the past flushWarning was not detecting that such a function was
associated with any warnings.
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Subsequent emissions of a warning from a particular source site can be
collected by L{_collectWarnings}. In particular, the per-module
emitted-warning cache should be bypassed (I{__warningregistry__}).
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L{_collectWarnings}'s behavior is not altered by the presence of an
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If the dictionary passed to L{_setWarningRegistryToNone} changes size
partway through the process, C{_setWarningRegistryToNone} continues to
set C{__warningregistry__} to L{None} on the rest of the values anyway.
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really a module and imports things on setattr. py.test does this, as
does L{twisted.python.deprecate.deprecatedModuleAttribute}.
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