@emilywaters/lotide/test/headTest.js

Lotide is an equality assertion tool, a simplistic model of Lodash

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

describe('#head', () => {

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

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

  it("returns undefined for non-arrays", () => {
    assert.strictEqual(head(0), undefined);
  });

});