Add test coverage for pages edge API routes (#48370)

Ensures we have coverage for edge API routes in pages so we don't
regress.

Closes: https://github.com/vercel/next.js/issues/48263

test/e2e/edge-pages-support/app/pages/api/[id].js

@@ -0,0 +1,12 @@
+export const config = {
+  runtime: 'edge',
+}
+
+export default async function handler(req) {
+  return new Response(
+    JSON.stringify({
+      hello: 'again',
+      query: Object.fromEntries(req.nextUrl.searchParams),
+    })
+  )
+}

test/e2e/edge-pages-support/app/pages/api/hello.js

@@ -0,0 +1,12 @@
+export const config = {
+  runtime: 'edge',
+}
+
+export default async function handler(req) {
+  return new Response(
+    JSON.stringify({
+      hello: 'world',
+      query: Object.fromEntries(req.nextUrl.searchParams),
+    })
+  )
+}

test/e2e/edge-pages-support/index.test.ts

@@ -39,6 +39,29 @@ describe('edge-render-getserversideprops', () => {
     })
   }
 
+  it('should have correct query for pages/api', async () => {
+    const res = await fetchViaHTTP(next.url, '/api/hello', { a: 'b' })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual({
+      hello: 'world',
+      query: {
+        a: 'b',
+      },
+    })
+  })
+
+  it('should have correct query for pages/api dynamic', async () => {
+    const res = await fetchViaHTTP(next.url, '/api/id-1', { a: 'b' })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual({
+      hello: 'again',
+      query: {
+        a: 'b',
+        id: 'id-1',
+      },
+    })
+  })
+
   it('should have correct query/params on index', async () => {
     const html = await renderViaHTTP(next.url, '/')
     const $ = cheerio.load(html)