test(api): strengthen validation tests for speed and scale query params

Author: VirenSumbly

app/api/streak/route.test.ts

@@ -195,6 +195,13 @@ describe('GET /api/streak', () => {
       // "5" doesn't match /^\d+(\.\d+)?s$/, so the default kicks in.
       expect(body).toContain('8s');
     });
+
+    it('falls back to 8s when speed=10 is provided', async () => {
+      const response = await GET(makeRequest({ user: 'octocat', speed: '10' }));
+      const body = await response.text();
+
+      expect(body).toContain('8s');
+    });
   });
 
   describe('scale parameter', () => {
@@ -211,6 +218,12 @@ describe('GET /api/streak', () => {
 
       expect(response.status).toBe(200);
     });
+
+    it('defaults to linear scale when scale=foo is given', async () => {
+      const response = await GET(makeRequest({ user: 'octocat', scale: 'foo' }));
+
+      expect(response.status).toBe(200);
+    });
   });
 
   describe('theme parameter', () => {