From b7fd6b36c366386c80d9704b38a793cca714e5f1 Mon Sep 17 00:00:00 2001
From: Kyle Stewart <4b796c65+bitbucket@gmail.com>
Date: Thu, 17 Mar 2016 19:26:59 -0700
Subject: Added strict resource testing to all tests.

Not closing files in a test will mark that test as erroneous.
---
 wheel/test/conftest.py | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 wheel/test/conftest.py

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))
-- 
cgit v1.2.1