https://github.com/zakintaliban/learning-mocha-chai

learning mocha and chai
https://github.com/zakintaliban/learning-mocha-chai

chai mocha mocha-tests mochajs

Last synced: about 1 month ago
JSON representation

learning mocha and chai

• Host: GitHub
• URL: https://github.com/zakintaliban/learning-mocha-chai
• Owner: Zakintaliban
• License: mit
• Created: 2021-03-03T06:05:05.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2021-03-06T08:31:33.000Z (almost 4 years ago)
• Last Synced: 2024-11-06T13:56:36.392Z (3 months ago)
• Topics: chai, mocha, mocha-tests, mochajs
• Language: JavaScript
• Homepage:
• Size: 17.6 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# LEARNING MOCHA-CHAI

## INSTALLATION

open your terminal/cmd/powershell and type:

```zsh

yarn init -y

yarn add -D mocha chai

```

now open `package.json` and edit it like this:

```json

13 lines (13 sloc)  201 Bytes

  

{

  "name": "mocha-chai",

  "version": "1.0.0",

  "main": "app.js",

  "license": "MIT",

  "scripts": {

    "test": "mocha"

  },

  "devDependencies": {

    "chai": "^4.3.0",

    "mocha": "^8.3.0"

  }

}

```

next we create a file for the app and folder for the test

```zsh

touch app.js

# to create app

mkdir test

# it's default for mocha and chai to be put in "test" folder"

cd test

touch app.test.js

# to test the app

```

in `app.js` code this:

```js

let testing = () => {

  return "OK";

};

let bio = (nama) => {

  return `hello ${nama}`;

};

let nambah = (angka1, angka2) => {

  return angka1 + angka2;

};

module.exports = { testing, bio, nambah };

```

in `app.test.js`, code this:

```js

const assert = require("chai").assert;

// import assert

const { testing } = require("../app");

const { bio } = require("../app");

const nambah = require("../app").nambah; // another way to import it

// import the file that need to be test

describe("coba aja", () => {

  it("coba aja should return 'OK'", () => {

    assert.equal(testing(), "OK");

  });

  it("coba aja should type string", () => {

    let result = bio("zakin");

    assert.typeOf(result, "string");

  });

  it("coba aja should return more than 5", () => {

    let result = nambah(5, 5);

    assert.isAbove(result, 5);

  });

});

```

describe() is simply a way to group our tests in Mocha.

We can nest our tests in groups as deep as we deem necessary.

describe() takes two arguments, the first is the name of the test group, and the second is a callback function.

it() is used for an individual test case.

it() should be written as if you were saying it out loud:

“It should equal zero”, “It should log the user in”, etc.

it() takes two arguments, a string explaining what the test should do, and a callback function which contains our actual test:

There are a number of different assertion tests included with assert.

The one we’ve already used is assert.equal(actual, expected);

This tests equality between our actual and expected parameters using double equals (==).

### that's all folks