Unit Tests in Python | Python Tutorial | Introduction to Unit Tests | TestCases | TestSuit

Unit tests are a way to make sure your code is correct. Python comes with a built-in unit test framework that makes it easy to write a lot of tests for your software.
In fact, many engineers will write a series of tests before they begin coding. This approach is called “test-driven development” and is very effective.
A test case is a document, which has a set of test data, preconditions, expected results, and postconditions, developed for a particular test scenario in order to verify compliance against a specific requirement.
Test Case acts as the starting point for the test execution, and after applying a set of input values, the application has a definitive outcome and leaves the system at some endpoint or also known as execution postcondition.
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