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Test Angular navigation with the real router: provide route configuration in the test bed, navigate with RouterTestingHarness, then assert the activated component, rendered result, and URL. Because navigation is asynchronous, await each navigation before checking its outcome.
Set up a router test with RouterTestingHarness
Angular’s current routing-testing guide uses Vitest syntax and recommends exercising configured routes rather than mocking Router. A real router test covers the interaction among route configuration, guards, the outlet, and the routed component. Follow the test runner and Angular version already used by your project; the guide’s examples should not be read as a setup guarantee for every runner or release.
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The harness creates a root component containing a RouterOutlet. Configure routes with provideRouter, create the harness, and use navigateByUrl to perform navigation. The component-type overload returns the activated component and throws if the activated type does not match. See Angular’s Testing routing and navigation guide and the RouterTestingHarness API reference.
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import { provideRouter } from '@angular/router';
import { RouterTestingHarness } from '@angular/router/testing';
describe('User route', () => {
it('renders the user selected by the URL', async () => {
TestBed.configureTestingModule({
providers: [provideRouter([
{ path: 'user/:id', component: UserProfile },
])],
});
const harness = await RouterTestingHarness.create();
const component = await harness.navigateByUrl(
'/user/123',
UserProfile,
);
expect(component.userId).toBe('123');
expect(harness.routeNativeElement?.textContent).toContain('123');
});
});This example assumes UserProfile reads the id route parameter and renders it. Adapt the assertion to the component’s public behavior rather than testing only an internal implementation detail. For fuller component-testing context, see Angular’s Component testing scenarios.
#1 Best Overall
Harness lifecycle and navigation details
RouterTestingHarness.create()is asynchronous and returns a harness with its own root outlet.- Call
await harness.navigateByUrl(url)before asserting navigation effects. Navigation returns a promise that resolves after navigation completes. - Use the overload with an expected component type when the route is supposed to activate that component; it returns that instance and fails if another type was activated.
- Only one harness may exist in the same test context. The API reference also specifies
destroyAfterEach: trueinModuleTeardownOptions.
Test route parameters through the URL
For a parameterized route such as user/:id, navigate to a concrete URL such as /user/123 and verify the parameter reaches the component and produces the expected user-visible state. Angular’s example reads the value using ActivatedRoute.snapshot.paramMap. This checks the configured route and parameter binding together, not merely a component supplied with a hand-built parameter.
Test guards by checking both outcomes
Provide a controlled fake for the guard’s dependency so the test can exercise an allowed and a blocked decision. In the allowed case, assert that the protected component activates. In the blocked case, assert the intended redirect or rejected-navigation behavior and inspect the resulting URL or outlet state as appropriate.
Angular’s guide demonstrates an unauthenticated user being redirected to a parsed /login URL and verifies that the login component renders. The key assertion is the user-visible destination, not only that the guard returned a particular value.
Test nested routes at their full URL
Navigate to the complete child URL and verify the parent and child behavior that matters to the feature, including route data where relevant. The parent component must contain a RouterOutlet for the child route. An integration-style harness test can then confirm that the configured hierarchy activates and renders as intended.
Rank #3
Test query parameters and fragments, including changes
Assert the initial query-parameter or fragment state when the component’s behavior depends on it. Query parameters can change without changing which component is loaded, so a test that only checks component activation may miss a meaningful state transition.
If the component is expected to react to later query-parameter changes, perform a second navigation with changed query parameters and assert the resulting state. A snapshot read verifies the value at one point in time; it does not by itself establish that the component responds to subsequent updates.
Test outlets and links at the level users exercise them
Routed-component tests cover the router, outlet, and routed component together. When link interaction is part of the feature, test the user-facing link behavior as well as the destination it produces. The harness is suitable for most routed-component tests; a custom host component can be more appropriate for named outlets or route arrangements that do not fit the harness.
Cover unknown URLs and unsuccessful navigation
Include unknown paths, guard rejection, or other failed navigation cases when they matter to the application. Do not assume every attempted navigation activates a component: rejected navigation may leave the outlet unactivated. Check the final URL and whether the outlet contains an activated route, according to the behavior your application promises.
Choose the test shape that matches the route
| Test approach | Best fit | What to verify |
|---|---|---|
RouterTestingHarness with real routes |
Most routed-component tests | Await navigation; check the activated component, rendered output, and URL. |
| Harness with a second navigation | Reactive query-parameter or route-state changes | Check the state after the component observes the updated URL. |
| Custom host component with an outlet | Named outlets or structures that do not fit the harness | Verify the relevant outlet and routed content in the configured host. |
Use real implementations where practical and fakes for external services or dependencies that are difficult to control. Angular’s guidance is explicit: Do not mock Angular Router – Instead, provide real route configurations and use the harness to navigate.
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