How to use Pytest to write and run automated tests for web applications

Introduction

Pytest is a testing framework for Python that makes it easy to write simple and scalable tests. It is widely used in the Python community and has a rich ecosystem of plugins that extend its functionality.

What is "Class" in Pytest?

We can use the class keyword to define a class in Python. A class is a blueprint for creating objects (a particular data structure), providing initial values for state (member variables or attributes), and implementations of behavior (member functions or methods).

class TestClass:
    def test_one(self):
        x = "this"
        assert 'h' in x

    def test_two(self):
        x = "hello"
        assert hasattr(x, 'check')

How to call functions from a class in Pytest?

To call functions from a class in Pytest, we need to create an instance of the class and then call the functions on that instance.

class TestClass:
    def test_one(self):
        x = "this"
        assert 'h' in x

    def test_two(self):
        x = "hello"
        assert hasattr(x, 'check')

def test_class():
    test = TestClass()
    test.test_one()
    test.test_two()

How to run Pytest?

To run Pytest, we need to install the pytest package and then run the pytest command in the terminal.

pip install pytest
pytest

what is fixture in Pytest?

A fixture is a function that provides a fixed baseline upon which tests can be run. Fixtures are used to initialize objects, set up the environment, and clean up after the test.

Explain function, class, module, and session scopes in Pytest.

• function: The fixture is run once for each test function.
• class: The fixture is run once for each test class.
• module: The fixture is run once for each test module.
• session: The fixture is run once for the entire test session.

Conclusion

In this article, we have learned how to use Pytest to write and run automated tests for Python applications. Pytest is a powerful testing framework that makes it easy to write simple and scalable tests. It has a rich ecosystem of plugins that extend its functionality and make it easy to integrate with other tools and libraries.