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Making the test run, when the script is run. #3762

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Making the test run, when the script is run. #3762

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9 changes: 9 additions & 0 deletions exercises/practice/hello-world/hello_world_test.py
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Expand Up @@ -28,3 +28,12 @@ class HelloWorldTest(unittest.TestCase):
def test_say_hi(self):
msg = "\n\nThis test expects a return of the string 'Hello, World!' \nDid you use print('Hello, World!') by mistake?"
self.assertEqual(hello(), "Hello, World!", msg=msg)

if __name__ == '__main__':
# Why is this if implanted?
# This prevents the contents within the if statement of this script from being run indirectly, when it is imported as a module in another script/module, or from recurring loops.
# So it runs only when you execute the test, i.e. this module/script.
# What does the naming mean?
# The name is __main__ because this is the default module that is run when the script is executed directly.
# If the script is run from another script, its name would be the name of the module it is imported as, i.e. hello_world_test.
unittest.main()