What are the basics of unittest mock tools?

What are the basics of unittest mock tools?

Unittest mock tools are used in Python to replace parts of your system under test and make assertions about how they have been used.

Can you give me an example of how to use a mock in a test?

Sure! You can use unittest.mock.Mock to create a mock object. For example:

from unittest.mock import Mock

mock_obj = Mock()
mock_obj.method()
mock_obj.method.assert_called_once()  # Asserts that method was called once

What are some common use cases for mocks?

Common use cases include testing interactions with external APIs, databases, or any component that is not the focus of the test.

How do I assert that a mock was called with specific arguments?

You can use assert_called_with method. For example:

mock_obj.method.assert_called_with(arg1, arg2)