What is Unit Testing?

Unit Testing is the practice of testing small parts of an application to ensure they work as intended

Importance of Unit Testing

Early Detection of Defects

Unit Testing helps identify defects early in the development process, leading to a more efficient and cost-effective development process

Improving Code Quality

Unit Testing is widely adopted due to its significant role in improving code quality and reducing the need for extensive debugging later on

Contributing to Software Stability and Reliability

By validating small code segments, Unit Testing contributes to the stability and reliability of software systems

Process of Unit Testing

Unit Testing involves three phases: Arrange, Act, and Assert, where the code is initialized, executed, and verified for expected results

Manual Unit Testing

Manual Unit Testing involves developers writing and running test cases by hand, which can be labor-intensive but is sometimes necessary

Automated Unit Testing

Automated Unit Testing uses test scripts and tools for fast and repeatable testing, particularly beneficial for projects with extensive codebases

'unittest' Module

Python's 'unittest' module provides developers with a suite of testing tools to create and execute tests efficiently

Steps for Python Unit Testing

The established steps for Python Unit Testing include preparing the test environment, invoking the code under test, comparing results, and reporting on success or failure

Practical Example

A function that multiplies two numbers can be thoroughly tested using Python's 'unittest' framework to confirm its robustness and ability to handle edge cases