Hey Invaders! 👽

#100daysofcode day 13, I continued working on my Junit course and started section 9: Code Coverage. Today, I learned how to generate code coverage reports, which help ensure that most of your lines of code are being tested. This is particularly important in enterprise codebases to maintain high code quality and reliability.

What is Code Coverage?

Code coverage is a metric used in software testing to measure the percentage of code that is executed when tests are run. Higher code coverage often indicates better-tested and more reliable code.

Types of Code Coverage:

1. Line Coverage: Measures the number of executed lines of code.

2. Branch Coverage: Ensures that every possible branch (e.g., if/else statements) is tested.

3. Path Coverage: Verifies that all possible paths through the code are tested.

4. Function Coverage: Checks that all functions or methods are called and tested.

Benefits of Code Coverage:

- Identifies Untested Code: Highlights parts of the codebase that are not covered by tests, allowing you to add necessary tests.

- Improves Code Quality: Ensures that your code is robust and handles various scenarios and edge cases.

- Facilitates Refactoring: Provides confidence when refactoring code, knowing that existing functionality is well-tested.

Generating Code Coverage Reports in IntelliJ:

In IntelliJ, generating a code coverage report is straightforward. There's a button with a shield icon that you can use to run your tests and create the report. The report visually shows which parts of your code are covered by tests and which are not, helping you to improve your test coverage.

Here's a step-by-step guide to generating code coverage reports in IntelliJ:

1. Open your project in IntelliJ.

2. Write and run your unit tests.

3. Click the shield icon to run tests with coverage.

4. View the coverage report, which highlights covered and uncovered lines.

By ensuring comprehensive test coverage, you can maintain a high level of code quality and reduce the likelihood of bugs in your applications. Keep pushing forward with your #100DaysOfCode challenge and happy coding!