test(nextjs): Update next 15 tests (#17919)

- Removes canary testing for v15, as [v16
beta](https://github.com/vercel/next.js/releases/tag/v16.0.0-beta.0) was
released
- Removes experimental `ppr` testing for v15 as this will not be marked
as stable in v15. Will move these tests to v16 under the new name
`cacheComponents` instead
- Updates the basepath test to run on next@^15

Author: chargome

dev-packages/e2e-tests/test-applications/nextjs-15-basepath/package.json

@@ -15,9 +15,9 @@
     "@types/node": "^18.19.1",
     "@types/react": "18.0.26",
     "@types/react-dom": "18.0.9",
-    "next": "15.4.2-canary.1",
-    "react": "beta",
-    "react-dom": "beta",
+    "next": "^15",
+    "react": "latest",
+    "react-dom": "latest",
     "typescript": "~5.0.0"
   },
   "devDependencies": {

dev-packages/e2e-tests/test-applications/nextjs-15/app/ppr-error/[param]/page.tsx

@@ -1,11 +1,7 @@
 const { withSentryConfig } = require('@sentry/nextjs');
 
 /** @type {import('next').NextConfig} */
-const nextConfig = {
-  experimental: {
-    ppr: true,
-  },
-};
+const nextConfig = {};
 
 module.exports = withSentryConfig(nextConfig, {
   silent: true,

dev-packages/e2e-tests/test-applications/nextjs-15/next.config.js

@@ -10,10 +10,8 @@
     "test:dev": "TEST_ENV=development playwright test",
     "test:dev-turbo": "TEST_ENV=dev-turbopack playwright test",
     "test:build": "pnpm install && pnpm build",
-    "test:build-canary": "pnpm install && pnpm add next@canary && pnpm add react@beta && pnpm add react-dom@beta && pnpm build",
-    "//": "15.0.0-canary.194 is the canary release attached to Next.js RC 1. We need to use the canary version instead of the RC because PPR will not work without. The specific react version is also attached to RC 1.",
-    "test:build-latest": "pnpm install && pnpm add next@15.0.0-canary.194 && pnpm add react@19.0.0-rc-cd22717c-20241013 && pnpm add react-dom@19.0.0-rc-cd22717c-20241013 && pnpm build",
-    "test:build-turbo": "pnpm install && pnpm add next@15.4.2-canary.1 && next build --turbopack",
+    "test:build-latest": "pnpm install && pnpm add next@15 && pnpm build",
+    "test:build-turbo": "pnpm install && next build --turbopack",
     "test:assert": "pnpm test:prod && pnpm test:dev"
   },
   "dependencies": {
@@ -22,9 +20,9 @@
     "@types/react": "18.0.26",
     "@types/react-dom": "18.0.9",
     "ai": "^3.0.0",
-    "next": "15.4.2-canary.1",
-    "react": "beta",
-    "react-dom": "beta",
+    "next": "15.5.4",
+    "react": "latest",
+    "react-dom": "latest",
     "typescript": "~5.0.0",
     "zod": "^3.22.4"
   },
@@ -37,10 +35,6 @@
   },
   "sentryTest": {
     "optionalVariants": [
-      {
-        "build-command": "pnpm test:build-canary",
-        "label": "nextjs-15 (canary)"
-      },
       {
         "build-command": "pnpm test:build-latest",
         "label": "nextjs-15 (latest)"