added search stats api spec

code/frontend/src/app/core/api/search-stats.api.spec.ts

@@ -0,0 +1,51 @@
+import { HttpClient, HttpParams } from '@angular/common/http';
+import { TestBed } from '@angular/core/testing';
+import { Observable, of } from 'rxjs';
+import { SeekerContentKind } from '@core/models/search-stats.models';
+import { SearchStatsApi } from './search-stats.api';
+
+interface HttpGetOptions {
+  params?: HttpParams;
+}
+
+type HttpGetStub = (url: string, options?: HttpGetOptions) => Observable<null>;
+
+describe('SearchStatsApi', () => {
+  function setup() {
+    const get = vi.fn<HttpGetStub>(() => of(null));
+    TestBed.configureTestingModule({
+      providers: [{ provide: HttpClient, useValue: { get } }],
+    });
+    return { api: TestBed.inject(SearchStatsApi), get };
+  }
+
+  function sentParams(get: ReturnType<typeof setup>['get']): HttpParams {
+    const options = get.mock.calls[0][1];
+    return options?.params ?? new HttpParams();
+  }
+
+  it('sends the first page of 50 when called without a query', () => {
+    const { api, get } = setup();
+
+    api.getEvents();
+
+    expect(get).toHaveBeenCalledWith('/api/seeker/search-stats/events', { params: expect.anything() });
+    expect(sentParams(get).toString()).toBe('page=1&pageSize=50');
+  });
+
+  it('sends the content kind filter', () => {
+    const { api, get } = setup();
+
+    api.getEvents({ contentKind: SeekerContentKind.Anime });
+
+    expect(sentParams(get).get('contentKind')).toBe(SeekerContentKind.Anime);
+  });
+
+  it('omits the content kind filter when unset', () => {
+    const { api, get } = setup();
+
+    api.getEvents({});
+
+    expect(sentParams(get).has('contentKind')).toBe(false);
+  });
+});