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How do I use patching in unittest.mock?

An example of an AI chatbot conversation about using patching in unittest.mock for testing.

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You

How do I use patching in unittest.mock?

MagicBuddy
MagicBuddy

Patching in unittest.mock allows you to replace parts of your system under test and make assertions about how they have been used.

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You

Can you give me an example of how to patch a function?

MagicBuddy
MagicBuddy

Sure! You can use @patch('module.function') as a decorator to replace function with a mock during the test.

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You

What if I want to patch a method in a class?

MagicBuddy
MagicBuddy

You can use @patch.object(ClassName, 'method_name') to patch a specific method of a class.

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You

How do I assert that the patched method was called?

MagicBuddy
MagicBuddy

You can use mock.assert_called_once() to check if the patched method was called exactly once.

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