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Python Testing, Debugging, and Error Handling Essentials

Table of Contents

1. Testing and Debugging Drill

1. Testing and Debugging Drill

1.1. Testing

1.1.1. What is the purpose of unit testing? drill python_testing_debugging

1.1.1.1. Answer

To verify that individual units of code are working correctly.

1.1.2. What is the purpose of integration testing? drill python_testing_debugging

1.1.2.1. Answer

To verify that multiple units of code work together correctly.

1.1.3. What is the purpose of system testing? drill python_testing_debugging

1.1.3.1. Answer

To verify that the entire system works correctly.

1.1.4. What is the purpose of acceptance testing? drill python_testing_debugging

1.1.4.1. Answer

To verify that the system meets the requirements of the stakeholders.

1.1.5. What is the difference between black box testing and white box testing? drill python_testing_debugging

1.1.5.1. Answer

Black box testing tests the system without knowledge of the internal workings, while white box testing tests the system with knowledge of the internal workings.

1.2. Pytest

1.2.1. What is pytest? drill python_testing_debugging

1.2.1.1. Answer

A popular testing framework for Python.

1.2.2. How do you write a test function in pytest? drill python_testing_debugging

1.2.2.1. Answer

Using the `def` keyword and prefixing the function name with `test_`.

1.2.3. What is the purpose of the `assert` statement in pytest? drill python_testing_debugging

1.2.3.1. Answer

To verify that a certain condition is true.

1.2.4. How do you run pytest tests? drill python_testing_debugging

1.2.4.1. Answer

Using the `pytest` command.

1.3. Unittest

1.3.1. What is unittest? drill python_testing_debugging

1.3.1.1. Answer

A built-in testing framework for Python.

1.3.2. How do you write a test class in unittest? drill python_testing_debugging

1.3.2.1. Answer

By subclassing `unittest.TestCase`.

1.3.3. What is the purpose of the `assertEqual` method in unittest? drill python_testing_debugging

1.3.3.1. Answer

To verify that two values are equal.

1.3.4. How do you run unittest tests? drill python_testing_debugging

1.3.4.1. Answer

Using the `unittest.main()` function.

1.4. Debugging

1.4.1. What is the purpose of the `pdb` module? drill python_testing_debugging

1.4.1.1. Answer

To provide a debugger for Python.

1.4.2. How do you set a breakpoint in pdb? drill python_testing_debugging

1.4.2.1. Answer

Using the `break` command.

1.4.3. What is the purpose of the `step` command in pdb? drill python_testing_debugging

1.4.3.1. Answer

To execute the next line of code.

1.4.4. How do you inspect a variable in pdb? drill python_testing_debugging

1.4.4.1. Answer

Using the `p` command.

1.5. Logging

1.5.1. What is the purpose of the `logging` module? drill python_testing_debugging

1.5.1.1. Answer

To provide a way to log messages in Python.

1.5.2. How do you configure logging in Python? drill python_testing_debugging

1.5.2.1. Answer

Using the `logging.basicConfig()` function.

1.5.3. What is the purpose of the `logger` object? drill python_testing_debugging

1.5.3.1. Answer

To provide a way to log messages.

1.5.4. How do you log a message in Python? drill python_testing_debugging

1.5.4.1. Answer

Using the `logger.log()` method.

1.6. Error Handling

1.6.1. What is the purpose of try-except blocks? drill python_testing_debugging

1.6.1.1. Answer

To catch and handle exceptions.

1.6.2. What is the purpose of the `try` block? drill python_testing_debugging

1.6.2.1. Answer

To contain code that may raise an exception.

1.6.3. What is the purpose of the `except` block? drill python_testing_debugging

1.6.3.1. Answer

To handle exceptions raised in the `try` block.

1.6.4. How do you raise an exception in Python? drill python_testing_debugging

1.6.4.1. Answer

Using the `raise` statement.