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Unit testing resolver in Angular Universal application with fakeAsync
How should I unit test threaded code?Unit Testing C CodeIs Unit Testing worth the effort?What is a reasonable code coverage % for unit tests (and why)?Unit test naming best practicesJavaScript unit test tools for TDDWhat is Unit test, Integration Test, Smoke test, Regression Test?Angular 2 Unit Testing a service that uses a Observable and Redux Rxjs selectorUnit test Angular serviceJasmine fakeAsync tick doesn't wait for promise to be resolved
I'm trying to unit test Resolver service in Angular. One of my test cases is setting value by transferState (Server Side Rendering). I gonna do it in pipe of getHomePageData
Observable. Notice, I mocked what that method is returning.
I'm trying to harness fakeAsync to it. Calling `flush()' (earlier tried tick()) I expected it to get into pipe, but it doesn't. What am I doing wrong here?
import Injectable, Inject, PLATFORM_ID from '@angular/core';
import Resolve from '@angular/router';
import makeStateKey, TransferState, StateKey from '@angular/platform-browser';
import isPlatformServer from '@angular/common';
import Observable, of from 'rxjs';
import tap from 'rxjs/operators';
import ScienceStoryService from '../../core/science-story/science-story.service';
import HomePage from './home-page';
@Injectable()
export class HomePageResolveService implements Resolve<HomePage>
constructor(private readonly scienceStoryService: ScienceStoryService,
@Inject(PLATFORM_ID) private readonly platformId,
private readonly transferState: TransferState)
resolve(): Observable<HomePage>
const HOMEPAGE_DATA_KEY: StateKey<HomePage> = this.getStateKey('homepage-data');
if (this.transferState.hasKey(HOMEPAGE_DATA_KEY))
const homePageData = this.transferState.get<HomePage>(HOMEPAGE_DATA_KEY, null);
this.transferState.remove(HOMEPAGE_DATA_KEY);
return of(homePageData);
else
return this.scienceStoryService.getHomePageData()
.pipe(
tap((homePageData: HomePage) =>
if (this.isPlatformServer())
this.transferState.set(HOMEPAGE_DATA_KEY, homePageData);
)
);
getStateKey(keyName: string): StateKey<HomePage>
return makeStateKey<HomePage>(keyName);
isPlatformServer(): boolean
return isPlatformServer(this.platformId);
Unit test:
it('should set transfer state while running on server', fakeAsync(() =>
spyOn(service, 'getStateKey').and.returnValue(makeStateKey<HomePage>('non-existing-key'));
const scienceStoryService = TestBed.get(ScienceStoryService);
spyOn(scienceStoryService, 'getHomePageData').and.returnValue(of());
const transferState = TestBed.get(TransferState);
spyOn(service, 'isPlatformServer').and.returnValue(true);
spyOn(transferState, 'set');
service.resolve();
flush();
expect(transferState.set).toHaveBeenCalledTimes(1);
));
angular unit-testing angular-universal angular-unit-test
add a comment |
I'm trying to unit test Resolver service in Angular. One of my test cases is setting value by transferState (Server Side Rendering). I gonna do it in pipe of getHomePageData
Observable. Notice, I mocked what that method is returning.
I'm trying to harness fakeAsync to it. Calling `flush()' (earlier tried tick()) I expected it to get into pipe, but it doesn't. What am I doing wrong here?
import Injectable, Inject, PLATFORM_ID from '@angular/core';
import Resolve from '@angular/router';
import makeStateKey, TransferState, StateKey from '@angular/platform-browser';
import isPlatformServer from '@angular/common';
import Observable, of from 'rxjs';
import tap from 'rxjs/operators';
import ScienceStoryService from '../../core/science-story/science-story.service';
import HomePage from './home-page';
@Injectable()
export class HomePageResolveService implements Resolve<HomePage>
constructor(private readonly scienceStoryService: ScienceStoryService,
@Inject(PLATFORM_ID) private readonly platformId,
private readonly transferState: TransferState)
resolve(): Observable<HomePage>
const HOMEPAGE_DATA_KEY: StateKey<HomePage> = this.getStateKey('homepage-data');
if (this.transferState.hasKey(HOMEPAGE_DATA_KEY))
const homePageData = this.transferState.get<HomePage>(HOMEPAGE_DATA_KEY, null);
this.transferState.remove(HOMEPAGE_DATA_KEY);
return of(homePageData);
else
return this.scienceStoryService.getHomePageData()
.pipe(
tap((homePageData: HomePage) =>
if (this.isPlatformServer())
this.transferState.set(HOMEPAGE_DATA_KEY, homePageData);
)
);
getStateKey(keyName: string): StateKey<HomePage>
return makeStateKey<HomePage>(keyName);
isPlatformServer(): boolean
return isPlatformServer(this.platformId);
Unit test:
it('should set transfer state while running on server', fakeAsync(() =>
spyOn(service, 'getStateKey').and.returnValue(makeStateKey<HomePage>('non-existing-key'));
const scienceStoryService = TestBed.get(ScienceStoryService);
spyOn(scienceStoryService, 'getHomePageData').and.returnValue(of());
const transferState = TestBed.get(TransferState);
spyOn(service, 'isPlatformServer').and.returnValue(true);
spyOn(transferState, 'set');
service.resolve();
flush();
expect(transferState.set).toHaveBeenCalledTimes(1);
));
angular unit-testing angular-universal angular-unit-test
Where are you subscribing to the Observable? Observables don't "execute" until they are subscribed to ... perhaps in your spec you could try something likeservice.resolve().subscribe(() => expect(transferState.set).toHaveBeenCalledTimes(1))
– dmcgrandle
Mar 8 at 20:25
add a comment |
I'm trying to unit test Resolver service in Angular. One of my test cases is setting value by transferState (Server Side Rendering). I gonna do it in pipe of getHomePageData
Observable. Notice, I mocked what that method is returning.
I'm trying to harness fakeAsync to it. Calling `flush()' (earlier tried tick()) I expected it to get into pipe, but it doesn't. What am I doing wrong here?
import Injectable, Inject, PLATFORM_ID from '@angular/core';
import Resolve from '@angular/router';
import makeStateKey, TransferState, StateKey from '@angular/platform-browser';
import isPlatformServer from '@angular/common';
import Observable, of from 'rxjs';
import tap from 'rxjs/operators';
import ScienceStoryService from '../../core/science-story/science-story.service';
import HomePage from './home-page';
@Injectable()
export class HomePageResolveService implements Resolve<HomePage>
constructor(private readonly scienceStoryService: ScienceStoryService,
@Inject(PLATFORM_ID) private readonly platformId,
private readonly transferState: TransferState)
resolve(): Observable<HomePage>
const HOMEPAGE_DATA_KEY: StateKey<HomePage> = this.getStateKey('homepage-data');
if (this.transferState.hasKey(HOMEPAGE_DATA_KEY))
const homePageData = this.transferState.get<HomePage>(HOMEPAGE_DATA_KEY, null);
this.transferState.remove(HOMEPAGE_DATA_KEY);
return of(homePageData);
else
return this.scienceStoryService.getHomePageData()
.pipe(
tap((homePageData: HomePage) =>
if (this.isPlatformServer())
this.transferState.set(HOMEPAGE_DATA_KEY, homePageData);
)
);
getStateKey(keyName: string): StateKey<HomePage>
return makeStateKey<HomePage>(keyName);
isPlatformServer(): boolean
return isPlatformServer(this.platformId);
Unit test:
it('should set transfer state while running on server', fakeAsync(() =>
spyOn(service, 'getStateKey').and.returnValue(makeStateKey<HomePage>('non-existing-key'));
const scienceStoryService = TestBed.get(ScienceStoryService);
spyOn(scienceStoryService, 'getHomePageData').and.returnValue(of());
const transferState = TestBed.get(TransferState);
spyOn(service, 'isPlatformServer').and.returnValue(true);
spyOn(transferState, 'set');
service.resolve();
flush();
expect(transferState.set).toHaveBeenCalledTimes(1);
));
angular unit-testing angular-universal angular-unit-test
I'm trying to unit test Resolver service in Angular. One of my test cases is setting value by transferState (Server Side Rendering). I gonna do it in pipe of getHomePageData
Observable. Notice, I mocked what that method is returning.
I'm trying to harness fakeAsync to it. Calling `flush()' (earlier tried tick()) I expected it to get into pipe, but it doesn't. What am I doing wrong here?
import Injectable, Inject, PLATFORM_ID from '@angular/core';
import Resolve from '@angular/router';
import makeStateKey, TransferState, StateKey from '@angular/platform-browser';
import isPlatformServer from '@angular/common';
import Observable, of from 'rxjs';
import tap from 'rxjs/operators';
import ScienceStoryService from '../../core/science-story/science-story.service';
import HomePage from './home-page';
@Injectable()
export class HomePageResolveService implements Resolve<HomePage>
constructor(private readonly scienceStoryService: ScienceStoryService,
@Inject(PLATFORM_ID) private readonly platformId,
private readonly transferState: TransferState)
resolve(): Observable<HomePage>
const HOMEPAGE_DATA_KEY: StateKey<HomePage> = this.getStateKey('homepage-data');
if (this.transferState.hasKey(HOMEPAGE_DATA_KEY))
const homePageData = this.transferState.get<HomePage>(HOMEPAGE_DATA_KEY, null);
this.transferState.remove(HOMEPAGE_DATA_KEY);
return of(homePageData);
else
return this.scienceStoryService.getHomePageData()
.pipe(
tap((homePageData: HomePage) =>
if (this.isPlatformServer())
this.transferState.set(HOMEPAGE_DATA_KEY, homePageData);
)
);
getStateKey(keyName: string): StateKey<HomePage>
return makeStateKey<HomePage>(keyName);
isPlatformServer(): boolean
return isPlatformServer(this.platformId);
Unit test:
it('should set transfer state while running on server', fakeAsync(() =>
spyOn(service, 'getStateKey').and.returnValue(makeStateKey<HomePage>('non-existing-key'));
const scienceStoryService = TestBed.get(ScienceStoryService);
spyOn(scienceStoryService, 'getHomePageData').and.returnValue(of());
const transferState = TestBed.get(TransferState);
spyOn(service, 'isPlatformServer').and.returnValue(true);
spyOn(transferState, 'set');
service.resolve();
flush();
expect(transferState.set).toHaveBeenCalledTimes(1);
));
angular unit-testing angular-universal angular-unit-test
angular unit-testing angular-universal angular-unit-test
asked Mar 8 at 8:02
magosmagos
1,78331939
1,78331939
Where are you subscribing to the Observable? Observables don't "execute" until they are subscribed to ... perhaps in your spec you could try something likeservice.resolve().subscribe(() => expect(transferState.set).toHaveBeenCalledTimes(1))
– dmcgrandle
Mar 8 at 20:25
add a comment |
Where are you subscribing to the Observable? Observables don't "execute" until they are subscribed to ... perhaps in your spec you could try something likeservice.resolve().subscribe(() => expect(transferState.set).toHaveBeenCalledTimes(1))
– dmcgrandle
Mar 8 at 20:25
Where are you subscribing to the Observable? Observables don't "execute" until they are subscribed to ... perhaps in your spec you could try something like
service.resolve().subscribe(() => expect(transferState.set).toHaveBeenCalledTimes(1))
– dmcgrandle
Mar 8 at 20:25
Where are you subscribing to the Observable? Observables don't "execute" until they are subscribed to ... perhaps in your spec you could try something like
service.resolve().subscribe(() => expect(transferState.set).toHaveBeenCalledTimes(1))
– dmcgrandle
Mar 8 at 20:25
add a comment |
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Where are you subscribing to the Observable? Observables don't "execute" until they are subscribed to ... perhaps in your spec you could try something like
service.resolve().subscribe(() => expect(transferState.set).toHaveBeenCalledTimes(1))
– dmcgrandle
Mar 8 at 20:25