JavaScript Unit Test

What is Unit Testing in JavaScript?

Unit testing in JavaScript involves testing individual functions and modules to ensure they work as expected. This process helps catch bugs early, improve maintainability, and increase confidence in code changes.

Popular JavaScript testing frameworks include Jest, Mocha, and Jasmine, with assertion libraries such as Chai, Supertest, and assert commonly used for Node.js applications.

Setting Up JavaScript Unit Testing

1. Install Dependencies

For a Node.js project

npm install --save-dev jest

For Mocha using npm:

npm install --save-dev mocha chai

2. Writing a Simple Jest Test

Example of a unit test using Jest:

// calculator.js
function add(a, b) {
    return a + b;
}
module.exports = add;

// calculator.test.js
const add = require('./calculator');

test('adds 2 + 3 to equal 5', () => {
    expect(add(2, 3)).toBe(5);
});

3. Running Tests in VS Code

For Jest

npx jest

For Mocha using npm:

npx mocha

How BaseRock AI Automates JavaScript Unit Testing

BaseRock AI simplifies unit testing in JavaScript by:

Automatically generating test cases for classes and methods.
Suggesting test coverage improvements based on code analysis.
Detecting edge cases using AI-driven analysis.
Seamless integration with VS Code for running tests automatically.

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Next Steps

Try BaseRock AI's automated test generation in your Java projects.
Integrate unit testing into your CI/CD pipelines.
Explore other tutorials: Java, Kotlin, Go, Python.

Unit Testing JavaScript Apps