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Technically, test discovery already works for test_json.py / json_tests, but not the way really expected (each test file is discovered individually), and not as simply as it could. The attached patch does the following:
- remove test_json.py
- rename json_tests to test_json (to match all other tests, following the example of test_email and test_importlib)
- remove main() and 'if __name__ == "__main__"' stanza from __init__.py
- rename test_suite() to load_tests(*args)
- Add test_json/__main__.py, which calls unittest.main
I believe this is the simplest, cleanest way to convert the json tests from test_main to unittest.main().
The patch is against 3.3; there are changes in 3.4 that make a patch against it not apply to 3.3. It merges forward easily, though.