Adding Mocha/Chai to your project (morning exercise edition)

README.md

Read the docs?

Mocha Chai

In your project directory

• Initialized git?
• Initialized npm?

Install Packages

• Install your packages with the command npm install -D mocha chai
  • Flags:
    • use -D to save the package(s) in the package.json file under "devDependencies"
    • use -S to save the package(s) in the package.json file under "dependencies"

Packages for running, creating, and managing your tests are generally considered development dependencies. Use the -D flag.

Create Structure

• Mocha, by default, looks for test files in a directory called test.
  • create your test files in this directory. here is a suggestion for file name:
    • *.spec.js * refers to the filename you're testing. If you're testing a module saved as calculator.js your test file should be named calculator.spec.js

Inside your test file

• Did you require mocha and/or chai ?
• Initialize chai's expect or should ?
• Are you requiring the file you're testing? ex. calculator.spec.js tests the calculator.js file. calculator.js needs to be imported into the calculator.spec.js file using node's require function.
• desc block? reference at mochajs.org
• it block? refernece at mochajs.org
• assertions? reference at chaijs.com

Run your tests

• command: mocha
• keep watching: mocha --watch
• bail on first failure: mocha --bail
• all-in-one: mocha --watch --bail

aw yiss.