Code coverage plugin in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a code coverage plugin in Cypress?

A code coverage plugin in Cypress helps measure how much of your application's code is tested by your tests. It shows which parts of the code ran during testing and which parts did not.

beginner

How does code coverage help improve software quality?

Code coverage helps identify untested parts of your code, so you can write tests for them. This reduces bugs and improves software reliability.

intermediate

Which file do you usually configure to enable the Cypress code coverage plugin?

You configure the code coverage plugin in the Cypress support file (usually cypress/support/e2e.js or e2e.ts) and the Cypress plugins file (cypress/plugins/index.js or index.ts).

intermediate

What is the role of the 'nyc' tool in Cypress code coverage?

'nyc' is a tool that collects and reports code coverage data. It works with Cypress to generate coverage reports showing which lines of code were tested.

beginner

Name one common file format used to store code coverage reports.

One common file format is 'lcov'. It is used to store detailed coverage data and can be viewed with many coverage report tools.

What does a code coverage plugin in Cypress measure?

A How fast the tests run

B Which parts of the code were executed during tests

C The number of tests written

D The size of the application code

Code coverage plugins measure which parts of the code were executed during tests to identify untested code.

Where do you add the code coverage plugin setup in a Cypress project?

A In the test spec files only

B In the package.json only

C In the Cypress support and plugins files

D In the node_modules folder

The setup for code coverage plugins is done in Cypress support and plugins files to hook into the test lifecycle.

Which tool is commonly used to generate code coverage reports with Cypress?

A nyc

B eslint

C webpack

D mocha

'nyc' is a popular tool to collect and generate code coverage reports.

What file format is often used to store detailed code coverage data?

A lcov

B json

C xml

D csv

'lcov' is a standard format for storing detailed code coverage information.

Why is code coverage important in testing?

A It automatically fixes bugs

B It speeds up test execution

C It reduces the size of the codebase

D It shows which code is tested and helps improve test completeness

Code coverage helps identify untested code, improving test completeness and software quality.

Explain how to set up a code coverage plugin in a Cypress project.

Think about installation, configuration files, and running tests.

Describe the benefits of using a code coverage plugin during testing.

Focus on quality and testing completeness.