I’m trying to setup Jest test framework into my project which use Angular 14 and Ionic 6, among other plugins which may be conflictive such as firebase and ngrx.
I’ve been following mainly this Tim Deschryver tutorial and some other, even copying and pasting some code from stack overflow about my Jest testing errors, but nothing works. Even I tried a fresh begin removing all my packages and modifications and starting again, but with no luck.
I have my updated repo in here GitHub - neil89/igloo (it’s pretty manageable). But as a summary, my main modifications have been these:
package.json
{
"name": "igloo",
"version": "0.0.1",
"author": "Ionic Framework",
"homepage": "https://ionicframework.com/",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "jest",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/common": "^14.0.0",
"@angular/core": "^14.0.0",
"@angular/fire": "^7.4.1",
"@angular/forms": "^14.0.0",
"@angular/platform-browser": "^14.0.0",
"@angular/platform-browser-dynamic": "^14.0.0",
"@angular/router": "^14.0.0",
"@briebug/jest": "^1.3.1",
"@ionic/angular": "^6.2.6",
"@ngrx/effects": "^14.3.1",
"@ngrx/store": "^14.3.1",
"firebase": "^9.9.4",
"rxjs": "~6.6.0",
"tslib": "^2.2.0",
"zone.js": "~0.11.4"
},
"devDependencies": {
"@angular-devkit/build-angular": "^14.0.0",
"@angular-eslint/builder": "~13.0.1",
"@angular-eslint/eslint-plugin": "~13.0.1",
"@angular-eslint/eslint-plugin-template": "~13.0.1",
"@angular-eslint/template-parser": "~13.0.1",
"@angular/cli": "^14.0.0",
"@angular/compiler": "^14.0.0",
"@angular/compiler-cli": "^14.0.0",
"@angular/language-service": "^14.0.0",
"@types/jest": "^29.0.1",
"@types/node": "^12.11.1",
"@typescript-eslint/eslint-plugin": "5.3.0",
"@typescript-eslint/parser": "5.3.0",
"eslint": "^7.6.0",
"eslint-plugin-import": "2.22.1",
"eslint-plugin-jsdoc": "30.7.6",
"eslint-plugin-prefer-arrow": "1.2.2",
"jest": "^28.1.3",
"jest-preset-angular": "^12.2.2",
"protractor": "~7.0.0",
"ts-node": "~8.3.0",
"typescript": "~4.7.3"
},
"jest": {
"preset": "jest-preset-angular",
"setupFilesAfterEnv": [
"<rootDir>/src/setupJest.ts"
],
"globalSetup": "jest-preset-angular/global-setup"
},
"description": "An Ionic project"
}
jest.config.js
/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
module.exports = {
globals: {
'ts-jest': {
tsconfig: 'tsconfig.spec.json',
isolatedModules: true,
},
},
moduleNameMapper: {
'@angular/compiler-cli/ngcc': '<rootDir>/node_modules/@angular/compiler-cli/bundles/ngcc/main-ngcc.js',
},
testEnvironment: 'jsdom',
modulePathIgnorePatterns: ['examples/.*', 'website/.*'],
snapshotSerializers: [require.resolve('jest-snapshot-serializer-raw')],
testPathIgnorePatterns: ['/node_modules/', '/examples/', '/e2e/.*/__tests__', '\\.snap
setupJest.ts
import 'jest-preset-angular';
One of my simpler failing tests: app.component.spec.ts
import { TestBed } from '@angular/core/testing';
import { RouterTestingModule } from '@angular/router/testing';
import { AppComponent } from './app.component';
describe('AppComponent', () => {
beforeEach(async () => {
await TestBed.configureTestingModule({
declarations: [
AppComponent
],
imports: [
RouterTestingModule.withRoutes([])
],
}).compileComponents();
});
it('should create the app', (() => {
const fixture = TestBed.createComponent(AppComponent);
const app = fixture.debugElement.componentInstance;
expect(app).toBeTruthy();
}));
it('should have menu labels', (() => {
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const app = fixture.nativeElement;
const menuItems = app.querySelectorAll('ion-label');
expect(menuItems.length).toEqual(7);
expect(menuItems[0].textContent).toContain('Inbox');
expect(menuItems[1].textContent).toContain('Outbox');
}));
it('should have urls', () => {
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const app = fixture.nativeElement;
const menuItems = app.querySelectorAll('ion-item');
expect(menuItems.length).toEqual(7);
expect(menuItems[0].getAttribute('ng-reflect-router-link')).toEqual('/folder/Inbox');
expect(menuItems[1].getAttribute('ng-reflect-router-link')).toEqual('/folder/Outbox');
});
});
And now, my output when I ran npm test is next:
> igloo@0.0.1 test
> jest
Determining test suites to run...
ngcc-jest-processor: running ngcc
FAIL src/app/fridge/fridge.service.spec.ts
● Test suite failed to run
Jest encountered an unexpected token
Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.
Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.
By default "node_modules" folder is ignored by transformers.
Here's what you can do:
• If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
• If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
• To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
• If you need a custom transformation specify a "transform" option in your config.
• If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.
You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/configuration
For information about custom transformations, see:
https://jestjs.io/docs/code-transformation
Details:
/Users/daniel.rodriguez/Documents/Personal/iGloo/igloo/node_modules/firebase/app/dist/index.esm.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import { registerVersion } from '@firebase/app';
^^^^^^
SyntaxError: Cannot use import statement outside a module
at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1796:14)
at node_modules/@angular/fire/bundles/angular-fire.umd.js:2:111
at Object.<anonymous> (node_modules/@angular/fire/bundles/angular-fire.umd.js:5:2)
FAIL src/app/fridge/fridge.component.spec.ts
● Test suite failed to run
Jest encountered an unexpected token
Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.
Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.
By default "node_modules" folder is ignored by transformers.
Here's what you can do:
• If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
• If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
• To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
• If you need a custom transformation specify a "transform" option in your config.
• If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.
You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/configuration
For information about custom transformations, see:
https://jestjs.io/docs/code-transformation
Details:
/Users/daniel.rodriguez/Documents/Personal/iGloo/igloo/node_modules/firebase/app/dist/index.esm.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import { registerVersion } from '@firebase/app';
^^^^^^
SyntaxError: Cannot use import statement outside a module
at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1796:14)
at node_modules/@angular/fire/bundles/angular-fire.umd.js:2:111
at Object.<anonymous> (node_modules/@angular/fire/bundles/angular-fire.umd.js:5:2)
FAIL src/app/folder/folder.page.spec.ts
● FolderPage › should create
Need to call TestBed.initTestEnvironment() first
9 |
10 | beforeEach(async () => {
> 11 | await TestBed.configureTestingModule({
| ^
12 | declarations: [ FolderPage ],
13 | imports: [IonicModule.forRoot(), RouterModule.forRoot([])]
14 | }).compileComponents();
at TestBedRender3.get compiler [as compiler] (node_modules/@angular/core/fesm2020/testing.mjs:26367:19)
at TestBedRender3.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26290:14)
at Function.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26126:30)
at src/app/folder/folder.page.spec.ts:11:19
at node_modules/tslib/tslib.js:118:75
at Object.__awaiter (node_modules/tslib/tslib.js:114:16)
at Object.<anonymous> (src/app/folder/folder.page.spec.ts:10:25)
● FolderPage › should create
zone-testing.js is needed for the fakeAsync() test helper but could not be found.
Please make sure that your environment includes zone.js/testing
at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)
FAIL src/app/app.component.spec.ts
● AppComponent › should create the app
Need to call TestBed.initTestEnvironment() first
7 |
8 | beforeEach(async () => {
> 9 | await TestBed.configureTestingModule({
| ^
10 | declarations: [
11 | AppComponent
12 | ],
at TestBedRender3.get compiler [as compiler] (node_modules/@angular/core/fesm2020/testing.mjs:26367:19)
at TestBedRender3.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26290:14)
at Function.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26126:30)
at src/app/app.component.spec.ts:9:19
at node_modules/tslib/tslib.js:118:75
at Object.__awaiter (node_modules/tslib/tslib.js:114:16)
at Object.<anonymous> (src/app/app.component.spec.ts:8:25)
● AppComponent › should create the app
zone-testing.js is needed for the fakeAsync() test helper but could not be found.
Please make sure that your environment includes zone.js/testing
at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)
● AppComponent › should have menu labels
NG0908: In this configuration Angular requires Zone.js
25 |
26 | it('should have menu labels', (() => {
> 27 | const fixture = TestBed.createComponent(AppComponent);
| ^
28 | fixture.detectChanges();
29 | const app = fixture.nativeElement;
30 | const menuItems = app.querySelectorAll('ion-label');
at new NgZone (node_modules/@angular/core/fesm2020/core.mjs:26180:19)
at R3TestBedCompiler.compileTestModule (node_modules/@angular/core/fesm2020/testing.mjs:25851:24)
at R3TestBedCompiler.finalize (node_modules/@angular/core/fesm2020/testing.mjs:25419:14)
at TestBedRender3.get testModuleRef [as testModuleRef] (node_modules/@angular/core/fesm2020/testing.mjs:26377:49)
at TestBedRender3.inject (node_modules/@angular/core/fesm2020/testing.mjs:26300:29)
at TestBedRender3.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26340:44)
at Function.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26179:37)
at Object.<anonymous> (src/app/app.component.spec.ts:27:29)
● AppComponent › should have menu labels
zone-testing.js is needed for the fakeAsync() test helper but could not be found.
Please make sure that your environment includes zone.js/testing
at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)
● AppComponent › should have urls
NG0908: In this configuration Angular requires Zone.js
35 |
36 | it('should have urls', () => {
> 37 | const fixture = TestBed.createComponent(AppComponent);
| ^
38 | fixture.detectChanges();
39 | const app = fixture.nativeElement;
40 | const menuItems = app.querySelectorAll('ion-item');
at new NgZone (node_modules/@angular/core/fesm2020/core.mjs:26180:19)
at R3TestBedCompiler.compileTestModule (node_modules/@angular/core/fesm2020/testing.mjs:25851:24)
at R3TestBedCompiler.finalize (node_modules/@angular/core/fesm2020/testing.mjs:25419:14)
at TestBedRender3.get testModuleRef [as testModuleRef] (node_modules/@angular/core/fesm2020/testing.mjs:26377:49)
at TestBedRender3.inject (node_modules/@angular/core/fesm2020/testing.mjs:26300:29)
at TestBedRender3.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26340:44)
at Function.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26179:37)
at Object.<anonymous> (src/app/app.component.spec.ts:37:29)
● AppComponent › should have urls
zone-testing.js is needed for the fakeAsync() test helper but could not be found.
Please make sure that your environment includes zone.js/testing
at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)
Test Suites: 4 failed, 4 total
Tests: 4 failed, 4 total
Snapshots: 0 total
Time: 1.861 s, estimated 2 s
Ran all test suites.
I’d appreciate any help on this, for sure there is something unconfigured or uninitialized. Thanks!