tc10-not-support-css-custom-properties

Test Case: JSDOM doesn't support CSS Custom Properties

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 background color (107ms)

  ● AppComponent › should get correct background color

    AssertionError: expected '' to equal 'var(--width)'

      26 |   it('should get correct background color', () => {
      27 |     const box = fixture.debugElement.query(By.css('.box'));
    > 28 |     expect(box.nativeElement.style.width).to.equal('var(--width)');
         |                                              ^
      29 |   });
      30 |
      31 |

      at src/app/app.component.spec.ts:28:46
      at ZoneDelegate.Object.<anonymous>.ZoneDelegate.invoke (node_modules/zone.js/dist/zone.js:391:26)
      at ProxyZoneSpec.Object.<anonymous>.ProxyZoneSpec.onInvoke (node_modules/zone.js/dist/proxy.js:129:39)
      at ZoneDelegate.Object.<anonymous>.ZoneDelegate.invoke (node_modules/zone.js/dist/zone.js:390:52)
      at Zone.Object.<anonymous>.Zone.run (node_modules/zone.js/dist/zone.js:150:43)
      at Object.testBody.length (node_modules/jest-zone-patch/index.js:50:27)

JSDOM doesn't support CSS Custom Properties

jsdom/jsdom#1895