Added strict resource testing to all tests.

Not closing files in a test will mark that test as erroneous.

1 files changed, 38 insertions, 0 deletions

diff --git a/wheel/test/conftest.py b/wheel/test/conftest.py
new file mode 100644
index 0000000..bda2a98
--- /dev/null
+++ b/wheel/test/conftest.py
@@ -0,0 +1,38 @@
+"""

+pytest local configuration plug-in

+"""

+

+import gc

+import warnings

+

+import pytest

+

+@pytest.yield_fixture(scope='function', autouse=True)

+def fail_on_ResourceWarning():

+    """This fixture captures ResourceWarning's and raises an assertion error

+    describing the file handles left open.

+

+    Since only Python 3 and PyPy3 have ResourceWarning's, this context will

+    have no effect when running tests on Python 2 or PyPy.

+

+    Because of autouse=True, this function will be automatically enabled for

+    all test_* functions in this module.

+

+    This code is primarily based on the examples found here:

+    https://stackoverflow.com/questions/24717027/convert-python-3-resourcewarnings-into-exception

+    """

+    try:

+        ResourceWarning

+    except NameError:

+        # Python 2, PyPy

+        yield

+        return

+    # Python 3, PyPy3

+    with warnings.catch_warnings(record=True) as caught:

+        warnings.resetwarnings() # clear all filters

+        warnings.simplefilter('ignore') # ignore all

+        warnings.simplefilter('always', ResourceWarning) # add filter

+        yield # run tests in this context

+        gc.collect() # run garbage collection (for pypy3)

+        # display the problematic filenames if any warnings were caught

+        assert not caught, '\n'.join((str(warning.message) for warning in caught))