Add unit tests for ImageProcessor

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/data/ImageProcessor.test.mjs

@@ -0,0 +1,43 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+
+// Mock dependencies that ImageProcessor imports but we don't need for pure method tests
+vi.mock('p-queue', () => ({ default: class { add(fn) { return fn(); } onIdle() {} } }));
+vi.mock('../common/prefixedConsole.mjs', () => ({ default: () => ({ info: vi.fn(), error: vi.fn() }) }));
+vi.mock('../common/fs.mjs', () => ({ exists: vi.fn(), mkdirp: vi.fn() }));
+vi.mock('fs/promises', () => ({ default: { writeFile: vi.fn() } }));
+
+const { default: ImageProcessor } = await import('./ImageProcessor.mjs');
+
+describe('ImageProcessor', () => {
+  let processor;
+
+  beforeEach(() => {
+    delete process.env.SITE_URL;
+    processor = new ImageProcessor();
+  });
+
+  describe('normalize', () => {
+    it('delegates to normalizeSplatnetResourcePath', () => {
+      const result = processor.normalize('https://api.lp1.av5ja.srv.nintendo.net/resources/prod/v2/weapon/image.png');
+      expect(result).toBe('v2/weapon/image.png');
+    });
+  });
+
+  describe('localPath', () => {
+    it('returns dist/assets/splatnet/{file}', () => {
+      expect(processor.localPath('v2/weapon/image.png')).toBe('dist/assets/splatnet/v2/weapon/image.png');
+    });
+  });
+
+  describe('publicUrl', () => {
+    it('returns /{outputDirectory}/{file} without SITE_URL', () => {
+      expect(processor.publicUrl('v2/weapon/image.png')).toBe('/assets/splatnet/v2/weapon/image.png');
+    });
+
+    it('prepends SITE_URL when set', () => {
+      process.env.SITE_URL = 'https://splatoon3.ink';
+      const proc = new ImageProcessor();
+      expect(proc.publicUrl('v2/weapon/image.png')).toBe('https://splatoon3.ink/assets/splatnet/v2/weapon/image.png');
+    });
+  });
+});