How to get the call count using Mock @patch in python?

How to get the call count using Mock @patch in python?

In Python's unittest.mock library, the @patch decorator allows you to replace a target object with a mock object during your tests. If you want to check the call count of a method on a mock object that was patched using @patch, you can use the call_count attribute of the method.

Here's an example:

from unittest.mock import patch import module_to_test def test_call_count(): # Patch the method with a mock object with patch('module_to_test.SomeClass.method_to_patch') as mock_method: # Run your test code that uses the patched method obj = module_to_test.SomeClass() obj.method_to_patch() obj.method_to_patch() # Check the call count assert mock_method.call_count == 2

In this example, replace 'module_to_test.SomeClass.method_to_patch' with the actual path to the method you want to patch. The patch context manager replaces the method with a mock object, and within the context, you can interact with the mock object and later check the call_count attribute to see how many times the method was called.

Remember that call_count is a property that provides the number of calls made to the method. You can use it to verify the expected number of calls during your tests.

Examples

  1. "Python Mock @patch get call count"

    • Description: This query is about using Python's Mock library with the @patch decorator to get the call count for a patched function.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

  2. "Python Mock @patch call count example"

    • Description: This query seeks an example demonstrating how to use Mock with @patch to retrieve the call count of a patched function.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

  3. "Python Mock patch object call count"

    • Description: This query looks for information on how to use the patch object from Mock to get the call count of a patched function.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch.object(module_name, 'function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

  4. "Python Mock @patch call_count usage"

    • Description: This query aims to understand how to use the call_count attribute with @patch in Python's Mock library.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

  5. "Python Mock @patch call count assert"

    • Description: This query focuses on how to use the call count retrieved with @patch in Python's Mock library to perform assertions in tests.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Assert call count assert mock_function.call_count == 2

  6. "Python Mock @patch function call count"

    • Description: This query aims to find methods to obtain the call count of a patched function using the @patch decorator in Python's Mock library.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

  7. "Python Mock patch object call count example"

    • Description: This query looks for an example demonstrating how to use the call count feature with patch.object in Python's Mock library.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch.object(module_name, 'function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

  8. "Python Mock assert_called_once_with example"

    • Description: This query explores using assert_called_once_with with Mock objects in Python to ensure a function is called only once with specific arguments.
    from unittest.mock import Mock # Create a mock object mock_function = Mock() # Call the function mock_function('argument') # Assert call count and arguments mock_function.assert_called_once_with('argument')

  9. "Python Mock @patch assert_called_once example"

    • Description: This query seeks an example demonstrating how to use assert_called_once with @patch in Python's Mock library.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function function_to_test() # Assert call count mock_function.assert_called_once()

  10. "Python Mock patch call_count usage"

    • Description: This query looks for information on how to utilize the call_count attribute provided by the patch function in Python's Mock library.
    from unittest.mock import patch def function_to_test(): # Code to test pass with patch('module_name.function_to_test') as mock_function: # Call the function multiple times function_to_test() function_to_test() # Get the call count call_count = mock_function.call_count print("Call count:", call_count)

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