Angular Testing

To test Angular signal components with Vitest, configure Angular v20+ using @angular/build:unit-test. Verify computed signals, component signal behavior, and deterministic updates by applying modern signal test patterns through TestBed.

Unit testing standalone Angular components with OnPush change detection requires correct TestBed configuration. Verify component rendering and signal updates by triggering change detection explicitly to ensure deterministic DOM updates.

Mock HTTP services in Angular unit tests using TestBed to provide test doubles. Verify HTTP-backed resources by intercepting service calls and asserting deterministic async flows and response handling.

You can migrate Jasmine Angular tests to Vitest using the Angular Testing skill. Configure the @angular/build:unit-test builder and adapt existing standalone component, signal, and service mocking patterns to the Vitest workflow.

Angular signal computed values may not update in unit tests if TestBed change detection is not triggered. Ensure OnPush components and signal dependencies are properly refreshed to verify deterministic updates.

Angular Testing supports signal-based services and dependency mocking. Use TestBed to inject mock signal services, verify computed logic, and test component inputs and outputs with deterministic mocked data.