test(validate-user): add mock integration coverage (JhaSourav07#3050)

Author: chavanGaneshDatta

services/github/validate-user.mock-integrations.test.ts

@@ -0,0 +1,67 @@
+// services/github/validate-user.mock-integrations.test.ts
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+vi.mock('../../lib/github', () => ({
+  fetchUserProfile: vi.fn(),
+}));
+
+import { fetchUserProfile } from '../../lib/github';
+import { gitHubUserValidator } from './validate-user';
+
+describe('GitHubUserValidator Mock Integrations', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    gitHubUserValidator.reset();
+  });
+
+  it('loads user data through mocked async service', async () => {
+    vi.mocked(fetchUserProfile).mockResolvedValue({} as never);
+
+    const result = await gitHubUserValidator.validateUser('ganesh');
+
+    expect(result).toBe(true);
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('queries cache before triggering another service request', async () => {
+    vi.mocked(fetchUserProfile).mockResolvedValue({} as never);
+
+    await gitHubUserValidator.validateUser('ganesh');
+    await gitHubUserValidator.validateUser('ganesh');
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('stores successful validation results in cache', async () => {
+    vi.mocked(fetchUserProfile).mockResolvedValue({} as never);
+
+    const first = await gitHubUserValidator.validateUser('ganesh');
+    const second = await gitHubUserValidator.validateUser('ganesh');
+
+    expect(first).toBe(true);
+    expect(second).toBe(true);
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('caches negative lookup results from mocked service', async () => {
+    vi.mocked(fetchUserProfile).mockRejectedValue(new Error('User not found'));
+
+    const first = await gitHubUserValidator.validateUser('missing-user');
+    const second = await gitHubUserValidator.validateUser('missing-user');
+
+    expect(first).toBe(false);
+    expect(second).toBe(false);
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('falls back correctly when async endpoint returns temporary failure', async () => {
+    vi.mocked(fetchUserProfile).mockRejectedValue(new Error('GitHub API timeout'));
+
+    await expect(gitHubUserValidator.validateUser('ganesh')).rejects.toThrow('GitHub API timeout');
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+});