Python Unit Test Automation

Listing 5-5.  test_module04.py
import pytest
@pytest.fixture()
def fixture01():
    print("\nIn fixture01()...")
def test_case01(fixture01):
    print("\nIn test_case01()...")
In Listing 
5-5
, fixture01() is the fixture function. It is because we are using the 
@pytest.fixture() decorator with that. test_case01() is a test function that uses 
fixture01(). For that, we are passing fixture01 as an argument to test_case01().
Here is the output:
============================= test session starts ======================
platform linux -- Python 3.4.2, pytest-3.0.4, py-1.4.31, pluggy-0.4.0 --  
/usr/bin/python3
cachedir: .cache
rootdir: /home/pi/book/code/chapter05/test, inifile:
collected 1 items
test_module04.py::test_case01
In fixture01()...
In test_case01()...
PASSED
========================== 1 passed in 0.04 seconds ====================

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Chapter 5 
■
 pytest
94
As you can see, fixture01() is invoked before the test function test_case01(). You 
could also use the @pytest.mark.usefixtures() decorator, which achieves the same 
result. The code in Listing 
5-6
 is implemented with this decorator and it produces the 
same output as Listing 
5-5
.