Test classes in PyTest - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a test class in pytest?

A test class in pytest is a Python class that groups related test methods together. It helps organize tests logically without needing to inherit from any special base class.

beginner

How do you name test methods inside a pytest test class?

Test methods inside a pytest test class should start with the prefix <code>test_</code>. This naming lets pytest automatically find and run them.

intermediate

Can pytest test classes have setup and teardown methods? How?

Yes. You can define setup_method(self, method) and teardown_method(self, method) inside the test class. These run before and after each test method respectively.

intermediate

Why use test classes instead of just functions in pytest?

Test classes help group related tests, share setup code, and improve readability. They make tests easier to maintain, especially when many tests share common setup.

beginner

Show a simple pytest test class with two test methods and a setup method.

class TestMathOperations:
    def setup_method(self, method):
        self.value = 10

    def test_add(self):
        assert self.value + 5 == 15

    def test_subtract(self):
        assert self.value - 3 == 7

What prefix should test methods inside a pytest test class have?

A check_

B test_

C verify_

D run_

Pytest automatically discovers test methods that start with test_.

Which method runs before each test method in a pytest test class?

A setup_function

B setup_class

C setup_module

D setup_method

setup_method runs before each test method in the class.

Do pytest test classes need to inherit from a special base class?

A Yes, from unittest.TestCase

B Yes, from object

C No, inheritance is not required

D Yes, from pytest.BaseTest

Pytest test classes do not require inheritance from any base class.

What is a main benefit of using test classes in pytest?

A They group related tests and share setup

B They run tests faster

C They automatically generate test data

D They replace the need for fixtures

Test classes help organize related tests and share setup code.

Which of these is a valid pytest test class name?

A TestCalculator

B calculatorTests

C testclass

D MyTests

Test classes should start with Test to be easily recognized.

Explain how to organize multiple related tests using pytest test classes.

Think about grouping and shared setup.

Describe the role of setup_method and teardown_method in pytest test classes.

Consider what happens before and after each test.