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Maintainability refers to making bug fixes or enhancements to your code or to another developer needing to update your code at some point in the future. Testing improves the maintainability of your code. They test from the outside in, from the end user's point of view.īoth unit and Functional testing are fundamental parts of the Test-Driven Development (TDD) process. Typically, these tests are focused on functionality that the user will be utilizing. They test from the inside out, from the programmer's point of view.įunctional tests test multiple components of a software product to make sure the components are working together properly.
They are the first line of defense against errors and inconsistencies in your codebase. Unit tests test the functionality of an individual unit of code isolated from its dependencies. Additionally, testable code is generally a sign of a good software architecture, which is why advanced developers take testing into account throughout the entire development lifecycle. Software projects with high test coverage are never perfect, but it's a good initial indicator of the quality of the software. In general, testing helps ensure that your app will work as expected for your end users. Determine code coverage of your tests with coverage.py.Create fixtures for initializing the state for test functions.Write unit and functional test functions with pytest.