Use Karma, Jasmine to do front-end unit testing

< a > Using technology

• Karma

• Jasmine

• Karma-coverage

< two > Install plug-in 1.nodejs 2. Install Karma

• NPM install-g Karma

• NPM install-g KARMA-CLI

3. Installing Jasmine

• NPM Install-g Jasmine

4. Installing Karma-coverage

• NPM install-g Karma-coverage

< three > Run a Program 1. Project directory structure:

2.add.js file

function Add (A, B) {return a + B;}

3.add-test.js

Describe ("My great and huge math Lib", function () {It ("should perfectly complete complex addition", function () {VA    R result = Add (3, 5);  Expect (result). toequal (8); });});

4.conf file

You can do this, under the Karma-my-proj directory

Karma Init pro-conf.js

5. Start the program

Karma Start Pro-conf.js

According to the prompts, choose JS directory, chrome, jasmine, etc.

6. You can also edit conf.js as follows:

<1>.files

List of files/patterns to load in the browser files: [' js/**/*.js ', ' test/**/*.js '],

<2>.coverage

Test results reporter to use//possible values: ' dots ', ' progress '//Available Reporters:https://npmjs.org/bro Wse/keyword/karma-reporter reporters: [' progress ', ' coverage '], preprocessors: {' js/**/*.js ': ' Coverage '}, Covera Gereporter: {type: ' html ', dir: ' coverage/'},

< four > operation result:
1. Terminal:

2. Browser

3. Coverage report:

Use Karma, Jasmine to do front-end unit testing