Nail Down Testing With JavaScript Modules

Reliable code starts here

Photo by Ferenc Almasi on Unsplash

Thoroughly tested code forms the bedrock of reliable software engineering. Luckily, testing JavaScript modules proves relatively painless compared to yesteryears’ convoluted methods. Jump in as I outline essential procedures and tools for exercising your beloved modules.

Selecting Tools

Choose from a plethora of testing frameworks and assertion libraries suited to personal preferences. Popular picks include Mocha, Chai, Sinon, Jest, and AVA. Regardless of choice, remember consistency matters most. Stick with chosen solutions throughout your project lifecycle.

Unit vs Integration Tests

Distinguish unit tests focusing on individual modules versus integration tests verifying component interplay. Unit tests isolate subjects, whereas integration tests mimic production conditions. Balance coverage to maximize reliability without sacrificing velocity.

Writing Tests

Structure tests similarly to standard Node.js applications, adhering to familiar conventions. Place tests within a designated folder, ideally adjacent to corresponding source files:

Example:

 -src
     -calculator.js
 -test
     -unit…