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tc31-cannot-get-video-textTracks

README.md

Test Case: JSDOM doesn't get current textTracks of video node

Topcoder handle

oa414

Test Case Code

provided in gitlab issue.

Your document content (required)

How to run test

Prerequisites

  1. Node 8+
  2. NPM or yarn
  3. Git
  4. Safari, Chrome, Firefox

Run Test on Karma

cd YOUR_CODE_DIR
git checkout master
npm install # or 'yarn' if your prefer
ng test

Run Test on Jest

change the line in angular.json:

"projects": {
    ...
      ...
         ...
         "architect": {
                ...
                "test": {
                          // repleace this line 
                          "builder": "@angular-devkit/build-angular:karma" 
                          // whith this:
                          "builder": "@angular-builders/jest:run"

then run test:

ng test

Browser have tested

Chrome, Safari, Firefox

Test Result

Browser Result
Chrome 72.0.3626 (Mac OS X 10.13.4) success
Safari 11.1.0 (Mac OS X 10.13.4) success
Firefox 65.0.0 (Mac OS X 10.13.0) success

Positive result on Jest

 FAIL  src/app/app.component.spec.ts
  AppComponent
    ✕ should get correct value from localstorage (105ms)

  ● AppComponent › should get correct value from localstorage

    AssertionError: expected 0 to equal 1

      26 |   it('should get correct value from localstorage', () => {
      27 |     const el = fixture.debugElement.query(By.css('video'));
    > 28 |     expect(el.nativeElement.textTracks.length).to.equal(1);
         |                                                   ^
      29 |   });
      30 |

It because jsdom doesn't correct textTracks attrubute of video tag.

jsdom/jsdom#2541