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tc29-not-support-worker-thread-api

README.md

Test Case: JSDOM doesn't support worker thread API.

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

  AppComponent
    ✕ should get correct value from worker (1063ms)

  ● AppComponent › should get correct value from worker

    ReferenceError: Worker is not defined

      10 |   ngOnInit() {
      11 |
    > 12 |     const worker = new Worker('assets/worker.js');
         |                    ^
      13 |
      14 |     worker.postMessage([3, 5]);
      15 |     worker.onmessage = (e) => {

      at AppComponent.Object.<anonymous>.AppComponent.ngOnInit (src/app/app.component.ts:12:20)
      at checkAndUpdateDirectiveInline (../packages/core/src/view/provider.ts:212:15)

  ● AppComponent › should get correct value from worker

    AssertionError: expected '' to equal '15'

      29 |       fixture.detectChanges();
      30 |       const el1 = fixture.debugElement.query(By.css('#box1'));
    > 31 |       expect(el1.nativeElement.textContent).to.equal('15');
         |                                                ^
      32 |       done();
      33 |     }, 500);
      34 |   });

      at src/app/app.component.spec.ts:31:48
      at ZoneDelegate.Object.<anonymous>.ZoneDelegate.invokeTask (node_modules/zone.js/dist/zone.js:423:31)
      at ProxyZoneSpec.Object.<anonymous>.ProxyZoneSpec.onInvokeTask (node_modules/zone.js/dist/proxy.js:160:39)

It because jsdom doesn't support worker thread API.

jsdom/jsdom#2020