Added unit tests for settings business logic elements

src/settings/reducers/realTimeUpdates.js

@@ -1,7 +1,7 @@
 import { handleActions } from 'redux-actions';
 import PropTypes from 'prop-types';
 
-const LOAD_REAL_TIME_UPDATES = 'shlink/realTimeUpdates/LOAD_REAL_TIME_UPDATES';
+export const LOAD_REAL_TIME_UPDATES = 'shlink/realTimeUpdates/LOAD_REAL_TIME_UPDATES';
 
 export const RealTimeUpdatesType = PropTypes.shape({
   enabled: PropTypes.bool.isRequired,

test/servers/reducers/server.test.js

@@ -4,7 +4,9 @@ import reducer, {
   deleteServer,
   listServers,
   createServers,
-  FETCH_SERVERS, FETCH_SERVERS_START, editServer,
+  editServer,
+  FETCH_SERVERS,
+  FETCH_SERVERS_START,
 } from '../../../src/servers/reducers/server';
 
 describe('serverReducer', () => {

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();
+    });
+  });
+});

test/settings/services/SettingsService.test.js

@@ -0,0 +1,46 @@
+import SettingsService from '../../../src/settings/services/SettingsService';
+
+describe('SettingsService', () => {
+  const settings = { foo: 'bar' };
+  const createService = (withSettings = true) => {
+    const storageMock = {
+      set: jest.fn(),
+      get: jest.fn(() => withSettings ? settings : undefined),
+    };
+    const service = new SettingsService(storageMock);
+
+    return [ service, storageMock ];
+  };
+
+  afterEach(jest.resetAllMocks);
+
+  describe('loadSettings', () => {
+    it.each([
+      [ false, {}],
+      [ true, settings ],
+    ])('returns result if found in storage', (withSettings, expectedResult) => {
+      const [ service, storageMock ] = createService(withSettings);
+
+      const result = service.loadSettings();
+
+      expect(result).toEqual(expectedResult);
+      expect(storageMock.get).toHaveBeenCalledTimes(1);
+      expect(storageMock.set).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('updateSettings', () => {
+    it.each([
+      [ false, { hi: 'goodbye' }, { hi: 'goodbye' }],
+      [ true, { hi: 'goodbye' }, { foo: 'bar', hi: 'goodbye' }],
+      [ true, { foo: 'goodbye' }, { foo: 'goodbye' }],
+    ])('appends provided data to existing settings', (withSettings, settingsToUpdate, expectedResult) => {
+      const [ service, storageMock ] = createService(withSettings);
+
+      service.updateSettings(settingsToUpdate);
+
+      expect(storageMock.get).toHaveBeenCalledTimes(1);
+      expect(storageMock.set).toHaveBeenCalledWith(expect.anything(), expectedResult);
+    });
+  });
+});