Added unit tests for beforeEach router method.

src/router/router.beforeEach.spec.js

@@ -0,0 +1,72 @@
+import issPageValues from '@/router/router-constants/issPage-values';
+
+let router;
+let saveSession;
+let showIssLoadingModal;
+let mockBeforeEachHandler;
+let mockStore;
+
+jest.mock('vue-router', () => ({
+    createWebHistory: jest.fn(() => ({ state: {} })),
+    createRouter: jest.fn((options) => ({
+        options,
+        beforeEach: jest.fn((handler) => {
+            mockBeforeEachHandler = handler;
+        }),
+        afterEach: jest.fn(),
+        addRoute: jest.fn(),
+        getRoutes: jest.fn(() => []),
+        hasRoute: jest.fn(() => true),
+        push: jest.fn(),
+        go: jest.fn(),
+        currentRoute: { value: { query: { issPage: 'welcome-page' } } }
+    }))
+}));
+
+jest.mock('@/helpers/order-helper.js', () => ({
+    saveSession: jest.fn(() => Promise.resolve())
+}));
+
+jest.mock('@/helpers/loading-modal-helper', () => jest.fn());
+
+jest.mock('@/store', () => ({
+    useMainStore: jest.fn(() => mockStore)
+}));
+
+describe('Router beforeEach callSaveSession', () => {
+    beforeAll(() => {
+        router = require('@/router/').default;
+        ({ saveSession } = require('@/helpers/order-helper.js'));
+        const loadingModalModule = require('@/helpers/loading-modal-helper');
+        showIssLoadingModal = loadingModalModule.default || loadingModalModule;
+    });
+
+    beforeEach(() => {
+        mockStore = {
+            order: {},
+            isBailout: false
+        };
+
+        jest.clearAllMocks();
+    });
+
+    it('calls saveSession synchronously when entering vehicle-selection without a referral number', async () => {
+        const result = await mockBeforeEachHandler(
+            {
+                name: issPageValues.VEHICLE_SELECTION,
+                query: { issPage: issPageValues.VEHICLE_SELECTION },
+                href: '/?issPage=vehicle-selection'
+            },
+            {
+                name: issPageValues.WELCOME_PAGE,
+                query: { issPage: issPageValues.WELCOME_PAGE }
+            }
+        );
+
+        expect(saveSession).toHaveBeenCalledTimes(1);
+        expect(saveSession).toHaveBeenCalledWith({ shouldAwaitSaveSessionQueue: true, bailoutOnError: true });
+        expect(showIssLoadingModal).toHaveBeenNthCalledWith(1, true);
+        expect(showIssLoadingModal).toHaveBeenNthCalledWith(2, false);
+        expect(result).toBe(true);
+    });
+});