Quality Assurance and Testing with Chai - Learn How JavaScript Assertions Work

SebaTheKnight · April 30, 2026, 1:33am

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boilerplate-mochachai-main/tests/1_unit-tests.js

main

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

suite('Unit Tests', function () {
  suite('Basic Assertions', function () {
    // #1
    test('#isNull, #isNotNull', function () {
      assert.isNull(null, 'This is an optional error description - e.g. null is null');
      assert.isNotNull(1, '1 is not null');
    });
    // #2
    test('#isDefined, #isUndefined', function () {
      assert.fail(null, 'null is not undefined');
      assert.fail(undefined, 'undefined IS undefined');
      assert.fail('hello', 'A string is not undefined');
    });
    // #3
    test('#isOk, #isNotOk', function () {
      assert.fail(null, 'null is falsey');
      assert.fail("I'm truthy", 'A string is truthy');

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###Your project link(s)

solution: test1/boilerplate-mochachai-main/tests/1_unit-tests.js at main · SebaTheKnight/test1 · GitHub

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Quality Assurance and Testing with Chai - Learn How JavaScript Assertions Work

ILM · April 30, 2026, 8:19am

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Quality Assurance and Testing with Chai - Learn How JavaScript Assertions Work

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