test(api): create specific integration test for streak views parameter JhaSourav07#2343 (JhaSourav07#2410)

## Description

Fixes JhaSourav07#2343
Program: GSSoC 2026

This PR introduces an isolated integration test suite tracking the
behavior of the `view` parameter group within the `/api/streak` router
engine.

Previously, view testing was lumped broadly under general validation
suites, which created gaps when verifying rendering outputs and
responsive dimensions tied to dynamic query configurations.

### Changes Made

* Created a brand new integration test file at
`app/api/streak/tests/views.test.ts`.
* Written 5 highly focused test cases utilizing mocked router payloads
checking valid inputs (`default`, `monthly`), fallback defaults on
omission or invalid inputs (`radar`), and response header verification.
* Asserted SVG formatting rules, content type alignments, and execution
handling bounds under Vitest.

### Why this matters

Isolates configuration interface bugs early before rendering workflows
kick off, guaranteeing that breaking style changes do not cascade into
downstream UI layout or parsing engines.

## Pillar

- [ ] 🎨 Pillar 1 — New Theme Design
- [ ] 📐 Pillar 2 — Geometric SVG Improvement
- [ ] 🕐 Pillar 3 — Timezone Logic Optimization
- [x] 🛠️ Other (Bug fix, refactoring, docs)

## Checklist before requesting a review:

- [x] I have read the `CONTRIBUTING.md` file.
- [x] I have tested these changes locally (`npm run test`).
- [x] I have run `npm run format` and `npm run lint` locally and
resolved all errors (CI will fail otherwise).
- [x] My commits follow the Conventional Commits format (e.g.,
`feat(themes): ...`, `fix(calculate): ...`).
- [ ] I have updated `README.md` if I added a new theme or URL
parameter.
- [x] I have starred the repo.
- [x] I have made sure that i have only one commit to merge in this PR.
- [x] The SVG output matches the CommitPulse "premium quality" aesthetic
standard (no raw elements, smooth animations, correct fonts).
- [x] (Recommended) I joined the CommitPulse Discord server for faster
collaboration, mentorship, and PR support.

Author: JhaSourav07

app/api/streak/tests/views.test.ts

@@ -0,0 +1,157 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { NextRequest } from 'next/server';
+import { GET } from '../route';
+import { streakParamsSchema } from '@/lib/validations';
+
+vi.mock('@/lib/github', () => ({
+  fetchGitHubContributions: vi.fn(),
+  getOrgDashboardData: vi.fn(),
+}));
+
+vi.mock('@/utils/time', () => ({
+  getSecondsUntilUTCMidnight: vi.fn(),
+  getSecondsUntilMidnightInTimezone: vi.fn(),
+}));
+
+import { fetchGitHubContributions, getOrgDashboardData } from '@/lib/github';
+import { getSecondsUntilUTCMidnight, getSecondsUntilMidnightInTimezone } from '@/utils/time';
+import type { ContributionCalendar, ExtendedContributionData } from '@/types';
+
+const mockCalendar: ContributionCalendar = {
+  totalContributions: 10,
+  weeks: [
+    {
+      contributionDays: [
+        { contributionCount: 1, date: '2024-06-10' },
+        { contributionCount: 2, date: '2024-06-11' },
+        { contributionCount: 0, date: '2024-06-12' },
+        { contributionCount: 3, date: '2024-06-13' },
+        { contributionCount: 1, date: '2024-06-14' },
+        { contributionCount: 0, date: '2024-06-15' },
+        { contributionCount: 3, date: '2024-06-16' },
+      ],
+    },
+    {
+      contributionDays: [
+        { contributionCount: 0, date: '2024-06-17' },
+        { contributionCount: 0, date: '2024-06-18' },
+        { contributionCount: 0, date: '2024-06-19' },
+        { contributionCount: 0, date: '2024-06-20' },
+        { contributionCount: 0, date: '2024-06-21' },
+        { contributionCount: 0, date: '2024-06-22' },
+        { contributionCount: 0, date: '2024-06-23' },
+      ],
+    },
+  ],
+};
+
+function makeRequest(params: Record<string, string> = {}): NextRequest {
+  const url = new URL('http://localhost:3000/api/streak');
+
+  for (const [key, value] of Object.entries(params)) {
+    url.searchParams.set(key, value);
+  }
+
+  return new NextRequest(url.toString());
+}
+
+describe('GET /api/streak view parameter integration', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+
+    vi.mocked(fetchGitHubContributions).mockResolvedValue({
+      calendar: mockCalendar,
+      repoContributions: [],
+    } as unknown as ExtendedContributionData);
+
+    vi.mocked(getOrgDashboardData).mockResolvedValue({
+      profile: {
+        username: 'octocat',
+        name: 'The Octocat',
+        avatarUrl: 'https://github.com/octocat.png',
+        isPro: false,
+        bio: 'Testing organization mock pipelines',
+        location: 'San Francisco, CA',
+        joinedDate: '2011-01-25',
+        developerScore: 85,
+        stats: { repositories: 10, followers: 2500, following: 9, stars: 450 },
+      },
+      stats: {
+        totalCommits: 10,
+        totalIssues: 2,
+        totalPRs: 5,
+        totalReviews: 1,
+        totalDiscussions: 0,
+        contributedTo: 3,
+      },
+      calendar: mockCalendar,
+    } as unknown as Awaited<ReturnType<typeof getOrgDashboardData>>);
+
+    vi.mocked(getSecondsUntilUTCMidnight).mockReturnValue(3600);
+    vi.mocked(getSecondsUntilMidnightInTimezone).mockReturnValue(7200);
+  });
+
+  it('returns 200 and the standard SVG headers for view=default', async () => {
+    const response = await GET(makeRequest({ user: 'octocat', view: 'default' }));
+
+    expect(response.status).toBe(200);
+    expect(response.headers.get('Content-Type')).toBe('image/svg+xml');
+    expect(response.headers.get('Content-Security-Policy')).toContain("default-src 'none'");
+
+    const body = await response.text();
+    expect(body).toContain('CURRENT_STREAK');
+  });
+
+  it('returns 200 and renders monthly dimensions for view=monthly', async () => {
+    const response = await GET(makeRequest({ user: 'octocat', view: 'monthly' }));
+
+    expect(response.status).toBe(200);
+
+    const body = await response.text();
+    expect(body).toContain('COMMITS THIS MONTH');
+    expect(body).toContain('width="300"');
+    expect(body).toContain('height="120"');
+    expect(body).toContain('viewBox="0 0 300 120"');
+  });
+
+  it('falls back to the default layout when view is omitted', async () => {
+    const parsed = streakParamsSchema.safeParse({ user: 'octocat' });
+
+    expect(parsed.success).toBe(true);
+    expect(parsed.success && parsed.data.view).toBe('default');
+
+    const response = await GET(makeRequest({ user: 'octocat' }));
+
+    expect(response.status).toBe(200);
+
+    const body = await response.text();
+    expect(body).toContain('CURRENT_STREAK');
+    expect(body).not.toContain('COMMITS THIS MONTH');
+  });
+
+  it('treats an invalid view value as default without crashing', async () => {
+    const parsed = streakParamsSchema.safeParse({ user: 'octocat', view: 'radar' });
+
+    expect(parsed.success).toBe(true);
+    expect(parsed.success && parsed.data.view).toBe('default');
+
+    const response = await GET(makeRequest({ user: 'octocat', view: 'radar' }));
+
+    expect(response.status).toBe(200);
+
+    const body = await response.text();
+    expect(body).toContain('CURRENT_STREAK');
+    expect(body).not.toContain('COMMITS THIS MONTH');
+  });
+
+  it('exposes stable caching headers on the SVG response', async () => {
+    const response = await GET(makeRequest({ user: 'octocat', view: 'default' }));
+
+    expect(response.status).toBe(200);
+    expect(response.headers.get('Content-Type')).toBe('image/svg+xml');
+    expect(response.headers.get('Cache-Control')).toBe(
+      'public, s-maxage=3600, stale-while-revalidate=86400'
+    );
+    expect(response.headers.get('X-Cache-Status')).toBe('HIT');
+  });
+});