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copied!<p>The default <code>unittest.main()</code> uses the default test loader to make a TestSuite out of the module in which main is running.</p> <p>You don't have to use this default behavior.</p> <p>You can, for example, make three <a href="http://docs.python.org/library/unittest.html#unittest.TestSuite" rel="noreferrer">unittest.TestSuite</a> instances.</p> <ol> <li><p>The "fast" subset.</p> <pre><code>fast = TestSuite() fast.addTests( TestFastThis ) fast.addTests( TestFastThat ) </code></pre></li> <li><p>The "slow" subset.</p> <pre><code>slow = TestSuite() slow.addTests( TestSlowAnother ) slow.addTests( TestSlowSomeMore ) </code></pre></li> <li><p>The "whole" set.</p> <pre><code>alltests = unittest.TestSuite([fast, slow]) </code></pre></li> </ol> <p>Note that I've adjusted the TestCase names to indicate Fast vs. Slow. You can subclass unittest.TestLoader to parse the names of classes and create multiple loaders.</p> <p>Then your main program can parse command-line arguments with <a href="http://docs.python.org/library/optparse.html" rel="noreferrer">optparse</a> or <a href="https://docs.python.org/dev/library/argparse.html" rel="noreferrer">argparse</a> (available since 2.7 or 3.2) to pick which suite you want to run, fast, slow or all.</p> <p>Or, you can trust that <code>sys.argv[1]</code> is one of three values and use something as simple as this</p> <pre><code>if __name__ == "__main__": suite = eval(sys.argv[1]) # Be careful with this line! unittest.TextTestRunner().run(suite) </code></pre>

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