greentest: add xtest_pep8.py

greentest/xtest_pep8.py

+import sys
+import os
+import unittest
+import glob
+import re
+from os.path import abspath, dirname, join, basename
+
+# this regex matches filenames of the standard tests (with one underscore)
+stdtest_re = re.compile('^(test_[^_].+|lock_tests)\.py$')
+
+script = 'pep8'
+
+try:
+    index = sys.argv.index('--script')
+except ValueError:
+    pass
+else:
+    script = sys.argv[index + 1]
+    del sys.argv[index:index + 2]
+
+
+# E501 line too long (80 character limit that we don't follow)
+command = script + ' --repeat --statistics --ignore E501 %s | grep -v E501'
+
+
+if os.system('pep8 --version'):
+    sys.stderr.write('Please install pep8 script\n')
+    sys.exit(0)
+
+
+def system(*args):
+    command = ' '.join(args)
+    popen_result = os.popen(command)
+    result = popen_result.read()
+    if result:
+        sys.stderr.write(result)
+        raise AssertionError('pep8 failed')
+
+
+class Test(unittest.TestCase):
+
+    def test_gevent(self):
+        import gevent
+        # E221 multiple spaces before operator
+        system(command % join(abspath(dirname(gevent.__file__)), '*.py'), '| grep -v E221')
+
+    def test_tests(self):
+        # E702 multiple statements on one line (from gevent import monkey; monkey.patch_all())
+        files = glob.glob(join(abspath(dirname(__file__)), '*.py'))
+        # filter out standard tests of form test_xxx.py (one underscore)
+        files = [filename for filename in files if stdtest_re.match(basename(filename)) is None]
+        system(command % (' '.join(files)), '| grep -v E702')
+
+    # we keep the standard tests as close to the originals as possible, so don't test them
+    def X_test_std_tests(self):
+        # E702 multiple statements on one line (from gevent import monkey; monkey.patch_all())
+        files = glob.glob(join(abspath(dirname(__file__)), '*.py'))
+        # only count standard tests of form test_xxx.py (one underscore)
+        files = [filename for filename in files if stdtest_re.match(basename(filename)) is not None]
+        system(command % (' '.join(files)), '| grep -v E702')
+
+    def test_examples(self):
+        # E702 multiple statements on one line (from gevent import monkey; monkey.patch_all())
+        system(command % join(dirname(abspath(dirname(__file__))), 'examples', '*.py'), '| grep -v E702')
+
+    def test_setup(self):
+        system(command % join(dirname(abspath(dirname(__file__))), 'setup.py'))
+
+
+if __name__ == '__main__':
+    unittest.main()