First PyTest test - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is PyTest used for?

PyTest is a tool to write and run tests for Python code. It helps check if your code works as expected.

beginner

How do you name a test function in PyTest?

Test functions should start with the word test_. For example, def test_addition():.

beginner

What does an assertion do in a PyTest test?

An assertion checks if a condition is true. If it is false, the test fails and shows an error.

beginner

How do you run tests using PyTest?

You run tests by typing pytest in the command line inside your project folder.

beginner

What is the output when a PyTest test passes?

PyTest shows a dot . for each passing test and a summary saying how many tests passed.

Which prefix should a PyTest test function have?

A test_

B check_

C run_

D assert_

PyTest recognizes test functions by the prefix test_.

What happens if an assertion in a PyTest test fails?

A PyTest skips the test

B The test passes anyway

C The test fails and shows an error

D PyTest crashes

An assertion failure means the test did not meet the expected condition, so it fails.

How do you run all tests in a folder using PyTest?

A Run <code>run_tests()</code> in Python

B Run <code>python test.py</code>

C Open tests in an editor

D Run <code>pytest</code> in the command line

Typing pytest in the command line runs all tests it finds in the folder.

What symbol does PyTest show for a passing test?

A F

B .

C E

D S

PyTest shows a dot . for each test that passes.

Which of these is a valid simple PyTest test function?

A def test_sum(): assert 1 + 1 == 2

B def check_sum(): assert 1 + 1 == 2

C def sum_test(): assert 1 + 1 == 2

D def sum(): assert 1 + 1 == 2

Only functions starting with test_ are recognized as tests by PyTest.

Explain how to write and run your first test using PyTest.

Think about the steps from writing code to seeing the test result.

Describe what happens when a PyTest test passes and when it fails.

Focus on the test output symbols and messages.