Grouping multiple test cases in a class

In this section, we will dive deep into grouping the test cases in a class.

Make sure to prefix your class with Test otherwise the class will be skipped.

Also, remember that the method names within the class should follow the pytest standards as test_% or %_test

# content of 3_group_tests.py

class TestClass:

def test_method_one(self):

x = "group"

assert "r" in x

def test_method_two(self):

x = "hello"

assert hasattr(x, "check")

Grouping test cases in classes can be beneficial for the following reasons:

• Organizing test cases.

• Sharing fixtures for tests only in that particular class.

• Applying marks at the class level and having them implicitly apply to all tests.

Though, you group multiple test cases within the same class, each test has a unique instance of the class.

# content of 4_class_isolation_test.py

class TestClassInstanceIsolation:

value = 0

def test_method_one(self):

self.value = 5

assert self.value == 5

def test_method_two(self):

assert self.value == 5