Question

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Python unittest – invoke unittest.main() with a custom TestSuite

I have a testsuite created with e.g.

suite = unittest.TestSuite()
suite.addTest(module1.MyTest("test_simple"))
suite.addTest(module2.MyTest("test_simple"))

and need to start these tests with unitest.main(). When trying just unitest.main(suite) no tests are run at all. How can I do this with unittest.main() without calling test.TextTestRunner or similar?

Answer 1

You can’t pass a TestSuite to main, check out the constructor of unittest.main.TestProgram (which is was unittest.main actually is) and how this class works. The first argument if anything is the module name, not a testsuite.

main() actually takes its arguments from sys.argv, as it is actually intended to be used from the command line and not from within a program. It’s just common to do so for convenience.