@mattseligman/lotide/test/headTest.js

Lotide is a mini clone of the Lodash Library to practice crating a personal npm package. It's like lodash, but without all that extra stuff. Just the things you need to start your project.

// test/head.js
const assert = require('chai').assert;
const head   = require('../head');

// TEST CODE
describe("head.js test---", () => {

  it("returns 1 for [1, 2, 3]", () => {
    assert.strictEqual(head([1, 2, 3]), 1);
  });

  it("returns '5' for ['5']", () => {
    assert.strictEqual(head(['5']), '5');
  });
      
  it("returns 5 for [5, 6, 7]", () => {
    assert.strictEqual(head([5, 6, 7]), 5);
  });
    
  it(`returns "Hello" for ["Hello", "Lighthouse", "Labs"]`, () => {
    assert.strictEqual(head(["Hello", "Lighthouse", "Labs"]), "Hello");
  });

  it("returns undefined for []", () => {
    assert.strictEqual(head([]), undefined);
  });

});