validate

Author: kanishka-2007-tech

services/github/validate-user.test.ts

@@ -0,0 +1,64 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { gitHubUserValidator } from './validate-user';
+import { fetchUserProfile } from '../../lib/github';
+
+vi.mock('../../lib/github', () => ({
+  fetchUserProfile: vi.fn(),
+}));
+
+describe('GitHubUserValidator', () => {
+  beforeEach(() => {
+    gitHubUserValidator.reset();
+    vi.clearAllMocks();
+  });
+
+  it('returns true for an existing GitHub user', async () => {
+    vi.mocked(fetchUserProfile).mockResolvedValue({} as never);
+
+    const result = await gitHubUserValidator.validateUser('octocat');
+
+    expect(result).toBe(true);
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('returns false when GitHub reports user not found', async () => {
+    vi.mocked(fetchUserProfile).mockRejectedValue(new Error('User not found'));
+
+    const result = await gitHubUserValidator.validateUser('missing-user');
+
+    expect(result).toBe(false);
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('caches successful validation results', async () => {
+    vi.mocked(fetchUserProfile).mockResolvedValue({} as never);
+
+    await gitHubUserValidator.validateUser('octocat');
+    await gitHubUserValidator.validateUser('octocat');
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('caches negative validation results', async () => {
+    vi.mocked(fetchUserProfile).mockRejectedValue(new Error('User not found'));
+
+    await gitHubUserValidator.validateUser('ghost-user');
+    await gitHubUserValidator.validateUser('ghost-user');
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(1);
+  });
+
+  it('rethrows temporary GitHub API errors without caching', async () => {
+    vi.mocked(fetchUserProfile).mockRejectedValue(new Error('GitHub API rate limit exceeded'));
+
+    await expect(gitHubUserValidator.validateUser('octocat')).rejects.toThrow(
+      'GitHub API rate limit exceeded'
+    );
+
+    await expect(gitHubUserValidator.validateUser('octocat')).rejects.toThrow(
+      'GitHub API rate limit exceeded'
+    );
+
+    expect(fetchUserProfile).toHaveBeenCalledTimes(2);
+  });
+});