Class TestInterceptor

packages/common/http/test/module_spec.ts:25–43

const IS_INTERCEPTOR_C_ENABLED = new HttpContextToken<boolean | undefined>(() => undefined);

class TestInterceptor implements HttpInterceptor {
  constructor(private value: string) {}

  intercept(req: HttpRequest<any>, delegate: HttpHandler): Observable<HttpEvent<any>> {
    const existing = req.headers.get('Intercepted');
    const next = !!existing ? existing + ',' + this.value : this.value;
    req = req.clone({setHeaders: {'Intercepted': next}});
    return delegate.handle(req).pipe(
      map((event) => {
        if (event instanceof HttpResponse) {
          const existing = event.headers.get('Intercepted');
          const next = !!existing ? existing + ',' + this.value : this.value;
          return event.clone({headers: event.headers.set('Intercepted', next)});
        }
        return event;
      }),
    );
  }
}

class InterceptorA extends TestInterceptor {
  constructor() {