Added test for mercure info helpers

test/mercure/reducers/mercureInfo.test.js

@@ -0,0 +1,70 @@
+import reducer, {
+  GET_MERCURE_INFO_START,
+  GET_MERCURE_INFO_ERROR,
+  GET_MERCURE_INFO,
+  loadMercureInfo,
+} from '../../../src/mercure/reducers/mercureInfo.js';
+
+describe('mercureInfoReducer', () => {
+  const mercureInfo = {
+    mercureHubUrl: 'http://example.com/.well-known/mercure',
+    token: 'abc.123.def',
+  };
+
+  describe('reducer', () => {
+    it('returns loading on GET_MERCURE_INFO_START', () => {
+      expect(reducer({}, { type: GET_MERCURE_INFO_START })).toEqual({
+        loading: true,
+        error: false,
+      });
+    });
+
+    it('returns error on GET_MERCURE_INFO_ERROR', () => {
+      expect(reducer({}, { type: GET_MERCURE_INFO_ERROR })).toEqual({
+        loading: false,
+        error: true,
+      });
+    });
+
+    it('returns mercure info on GET_MERCURE_INFO', () => {
+      expect(reducer({}, { type: GET_MERCURE_INFO, ...mercureInfo })).toEqual({
+        ...mercureInfo,
+        loading: false,
+        error: false,
+      });
+    });
+  });
+
+  describe('loadMercureInfo', () => {
+    const createApiClientMock = (result) => ({
+      mercureInfo: jest.fn(() => result),
+    });
+    const dispatch = jest.fn();
+    const getState = () => ({});
+
+    afterEach(jest.resetAllMocks);
+
+    it('calls API on success', async () => {
+      const apiClientMock = createApiClientMock(Promise.resolve(mercureInfo));
+
+      await loadMercureInfo(() => apiClientMock)()(dispatch, getState());
+
+      expect(apiClientMock.mercureInfo).toHaveBeenCalledTimes(1);
+      expect(dispatch).toHaveBeenCalledTimes(2);
+      expect(dispatch).toHaveBeenNthCalledWith(1, { type: GET_MERCURE_INFO_START });
+      expect(dispatch).toHaveBeenNthCalledWith(2, { type: GET_MERCURE_INFO, ...mercureInfo });
+    });
+
+    it('throws error on failure', async () => {
+      const error = 'Error';
+      const apiClientMock = createApiClientMock(Promise.reject(error));
+
+      await loadMercureInfo(() => apiClientMock)()(dispatch, getState());
+
+      expect(apiClientMock.mercureInfo).toHaveBeenCalledTimes(1);
+      expect(dispatch).toHaveBeenCalledTimes(2);
+      expect(dispatch).toHaveBeenNthCalledWith(1, { type: GET_MERCURE_INFO_START });
+      expect(dispatch).toHaveBeenNthCalledWith(2, { type: GET_MERCURE_INFO_ERROR });
+    });
+  });
+});