Why Code coverage plugin in Cypress? - Purpose & Use Cases

The Big Idea

What if you could instantly see which parts of your app are still untested and risky?

The Scenario

Imagine testing a web app by clicking through every page and feature manually, hoping you didn't miss any part of the code.

You write down what you tested on paper or a simple list, but you can't be sure if every line of code was actually checked.

The Problem

Manual testing is slow and tiring. You might forget some features or miss hidden bugs.

Without clear proof, you can't tell if your tests cover all the important parts of your app.

This leads to wasted time and risky releases.

The Solution

The code coverage plugin automatically tracks which parts of your code run during tests.

It shows you exactly what is tested and what is not, so you can focus on missing areas.

This saves time, reduces errors, and builds confidence in your testing.

Before vs After

✗ Before

Run tests manually and guess coverage based on memory or notes.

✓ After

Use a code coverage plugin to see a report of tested and untested code automatically.

What It Enables

It enables you to confidently deliver high-quality software by knowing exactly how much of your code is tested.

Real Life Example

A developer runs Cypress tests with the code coverage plugin and finds that some critical functions are never tested.

They add tests for those parts, preventing bugs before release.

Key Takeaways

Manual testing can miss important code areas.

Code coverage plugin shows exactly what code is tested.

This helps improve test quality and software reliability.