test(plugins/search): complete AlphaPerformSearchApi coverage

Signed-off-by: Camila Belo <camilaibs@gmail.com>
Signed-off-by: Eric Peterson <ericpeterson@spotify.com>

plugins/search/src/apis.test.ts

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { CatalogApi } from '@backstage/plugin-catalog-react';
+
+import { SearchClient } from './apis';
+
+describe('apis', () => {
+  const query = {
+    term: '',
+    filters: {},
+    types: [],
+    pageCursor: '',
+  };
+
+  const baseUrl = 'https://base-url.com/';
+  const getBaseUrl = jest.fn().mockResolvedValue(baseUrl);
+  const client = new SearchClient({
+    catalogApi: {} as CatalogApi,
+    discoveryApi: { getBaseUrl },
+  });
+
+  const json = jest.fn();
+  const originalFetch = window.fetch;
+  window.fetch = jest.fn().mockResolvedValue({ json });
+
+  afterAll(() => {
+    window.fetch = originalFetch;
+  });
+
+  it('Fetch is called with expected URL (including stringified Q params)', async () => {
+    await client._alphaPerformSearch(query);
+    expect(getBaseUrl).toHaveBeenLastCalledWith('search/query');
+    expect(fetch).toHaveBeenLastCalledWith(`${baseUrl}?term=&pageCursor=`);
+  });
+
+  it('Resolves JSON from fetch response', async () => {
+    const result = { loading: false, error: '', value: {} };
+    json.mockReturnValueOnce(result);
+    expect(await client._alphaPerformSearch(query)).toStrictEqual(result);
+  });
+});