Py Test

Py Test:

Pytest is a testing framework for Python that allows you to write tests in a simple and concise manner. It provides various features and capabilities for writing and running tests, making it a popular choice among Python developers.

Here is a brief overview of how Pytest works and some of its key features:

Test Discovery: Pytest automatically discovers and runs test functions and methods in your codebase. It looks for files and directories with names starting with test_ or ending with _test and collects all the test cases.

Test Functions: In Pytest, tests are defined as regular Python functions. You can use the assert statement to check if a condition holds true and indicate whether a test passes or fails.

Test Execution: Pytest executes tests in parallel, by default. It uses a sophisticated algorithm to optimize test execution time and provides detailed reporting and informative error messages.

Fixtures: Pytest offers a powerful fixture mechanism that helps you define and manage the setup and teardown of test resources. Fixtures provide a way to share data, objects, or code among multiple tests.

Test Configuration: Pytest allows you to configure various aspects of test execution through command-line options, configuration files, or custom plugins. This flexibility enables you to customize the testing process to suit your specific needs.

Plugins and Integrations: Pytest has a rich ecosystem of plugins that extend its functionality. These plugins cover a wide range of areas, including code coverage, test result visualization, mocking, database testing, and more.

To use Pytest, you need to install it first. You can do this using pip, the Python package manager, by running the following command:

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pip install pytest

Once installed, you can create a test file with test functions and execute it using the pytest command. Pytest will automatically discover and run the tests in the specified file or directory.

For example, let us say you have a file called test_math.py with the following contents:

python

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def test_addition():

    assert 2 + 2 == 4

def test_subtraction():

    assert 5 – 3 == 2

To run these tests, you can execute the following command:

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pytest test_math.py

Pytest will execute the tests and provide a detailed report indicating whether each test passed or failed.

This is just a basic introduction to Pytest. There is much more you can do with Pytest, including advanced features like parametrized testing, test skipping, marking tests, and more. I recommend checking out the Pytest documentation for more information: