Added unit tests for settings business logic elements

test/settings/reducers/realTimeUpdates.test.js

@@ -0,0 +1,47 @@
+import reducer, {
+  LOAD_REAL_TIME_UPDATES,
+  loadRealTimeUpdates,
+  setRealTimeUpdates,
+} from '../../../src/settings/reducers/realTimeUpdates';
+
+describe('realTimeUpdatesReducer', () => {
+  const SettingsServiceMock = {
+    updateSettings: jest.fn(),
+    loadSettings: jest.fn(),
+  };
+
+  afterEach(jest.clearAllMocks);
+
+  describe('reducer', () => {
+    it('returns realTimeUpdates when action is LOAD_REAL_TIME_UPDATES', () => {
+      expect(reducer({}, { type: LOAD_REAL_TIME_UPDATES, enabled: true })).toEqual({ enabled: true });
+    });
+  });
+
+  describe('loadRealTimeUpdates', () => {
+    it.each([
+      [{}, true ],
+      [{ realTimeUpdates: {} }, true ],
+      [{ realTimeUpdates: { enabled: true } }, true ],
+      [{ realTimeUpdates: { enabled: false } }, false ],
+    ])('loads settings and returns LOAD_REAL_TIME_UPDATES action', (loadedSettings, expectedEnabled) => {
+      SettingsServiceMock.loadSettings.mockReturnValue(loadedSettings);
+
+      const result = loadRealTimeUpdates(SettingsServiceMock)();
+
+      expect(result).toEqual({ type: LOAD_REAL_TIME_UPDATES, enabled: expectedEnabled });
+      expect(SettingsServiceMock.loadSettings).toHaveBeenCalled();
+    });
+  });
+
+  describe('setRealTimeUpdates', () => {
+    it.each([[ true ], [ false ]])('updates settings with provided value and then loads updates again', (enabled) => {
+      const loadRealTimeUpdatesAction = jest.fn();
+
+      setRealTimeUpdates(SettingsServiceMock, loadRealTimeUpdatesAction)(enabled);
+
+      expect(SettingsServiceMock.updateSettings).toHaveBeenCalledWith({ realTimeUpdates: { enabled } });
+      expect(loadRealTimeUpdatesAction).toHaveBeenCalled();
+    });
+  });
+});