test(StudentProfileModel-mock-integrations): verify Asynchronous Service Layer Mocking & Local Cache Stubs (Variation 9)

Author: atul-upadhyay-7

models/StudentProfile.mock-integrations.test.ts

@@ -0,0 +1,80 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+// import target functions
+import {} from // exports
+'./StudentProfile';
+
+describe('StudentProfile async service layer mock & cache stub integrations', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('shows pending service state while loading', async () => {
+    const mockService = vi.fn(
+      () => new Promise((resolve) => setTimeout(() => resolve('done'), 50))
+    );
+
+    const promise = mockService();
+
+    expect(mockService).toHaveBeenCalled();
+
+    await promise;
+  });
+
+  it('checks cache before database retrieval', async () => {
+    const cacheGet = vi.fn().mockReturnValue('cached-data');
+    const dbGet = vi.fn();
+
+    const result = cacheGet();
+
+    expect(result).toBe('cached-data');
+    expect(dbGet).not.toHaveBeenCalled();
+  });
+
+  it('uses fallback when endpoint timeout occurs', async () => {
+    const api = vi.fn().mockRejectedValue(new Error('timeout'));
+
+    let result;
+
+    try {
+      await api();
+    } catch {
+      result = 'fallback';
+    }
+
+    expect(result).toBe('fallback');
+  });
+
+  it('writes cache after successful refresh', async () => {
+    const cacheSet = vi.fn();
+
+    const data = {
+      login: 'ganesh',
+    };
+
+    cacheSet(data);
+
+    expect(cacheSet).toHaveBeenCalledWith(data);
+  });
+
+  it('handles async service mock flow', async () => {
+    const cacheGet = vi.fn().mockReturnValue(null);
+
+    const dbGet = vi.fn().mockResolvedValue({
+      value: 'fresh',
+    });
+
+    const cacheSet = vi.fn();
+
+    const cached = cacheGet();
+
+    if (!cached) {
+      const fresh = await dbGet();
+      cacheSet(fresh);
+    }
+
+    expect(cacheGet).toHaveBeenCalled();
+    expect(dbGet).toHaveBeenCalled();
+    expect(cacheSet).toHaveBeenCalled();
+  });
+});