[test] Use unique error messages in server-source-maps (#79108)

Allows unambigious assertions on CLI output.
Not that interesting for dev but `next build` will have the logs for all pages in all tests.

I also made the pages static where possible so that we'll be able to assert on the logged errors during `next build`.

Author: eps1lon

test/e2e/app-dir/server-source-maps/fixtures/default/app/bad-sourcemap/page.js

@@ -1,13 +1,9 @@
-import { connection } from 'next/server'
-
 function logError(cause) {
-  const error = new Error('Boom', { cause })
+  const error = new Error('rsc-error-log-cause', { cause })
   console.error(error)
 }
 
-export default async function Page() {
-  await connection()
-
+export default function Page() {
   const error = new Error('Boom')
   logError(error)
   return null

test/e2e/app-dir/server-source-maps/fixtures/default/app/bad-sourcemap/page.js.map

@@ -1,14 +1,10 @@
-import { connection } from 'next/server'
-
 class UnnamedError extends Error {}
 class NamedError extends Error {
   name = 'MyError'
 }
 
-export default async function Page() {
-  await connection()
-
-  console.error(new UnnamedError('Foo'))
-  console.error(new NamedError('Bar'))
+export default function Page() {
+  console.error(new UnnamedError('rsc-error-log-custom-name-Foo'))
+  console.error(new NamedError('rsc-error-log-custom-name-Bar'))
   return null
 }

test/e2e/app-dir/server-source-maps/fixtures/default/app/rsc-error-log-cause/page.js

@@ -1,18 +1,15 @@
-import { connection } from 'next/server'
 import { runInternal } from 'internal-pkg'
 import { runInternalSourceMapped } from 'internal-pkg/sourcemapped'
 import { runInternalIgnored } from 'internal-pkg/ignored'
 import { runExternal } from 'external-pkg'
 import { runExternalSourceMapped } from 'external-pkg/sourcemapped'
 
 function logError() {
-  const error = new Error('Boom')
+  const error = new Error('rsc-error-log-ignore-listed')
   console.error(error)
 }
 
 export default async function Page() {
-  await connection()
-
   runInternal(function runWithInternal() {
     runInternalSourceMapped(function runWithInternalSourceMapped() {
       runExternal(function runWithExternal() {

test/e2e/app-dir/server-source-maps/fixtures/default/app/rsc-error-log-custom-name/page.js

@@ -1,14 +1,11 @@
 import { someClass } from './styles.module.css'
-import { connection } from 'next/server'
 
 function logError() {
-  const error = new Error('Boom')
+  const error = new Error('rsc-error-log')
   console.error(error)
 }
 
-export default async function Page() {
-  await connection()
-
+export default function Page() {
   logError()
   return <p className={someClass}>Hello, Dave!</p>
 }

test/e2e/app-dir/server-source-maps/fixtures/default/app/rsc-error-log-ignore-listed/page.js

@@ -6,7 +6,7 @@ import { runExternal } from 'external-pkg'
 import { runExternalSourceMapped } from 'external-pkg/sourcemapped'
 
 function logError() {
-  const error = new Error('Boom')
+  const error = new Error('ssr-error-log-ignore-listed')
   console.error(error)
 }
 

test/e2e/app-dir/server-source-maps/fixtures/default/app/rsc-error-log/page.js

@@ -1,7 +1,7 @@
 'use client'
 
 function throwError() {
-  throw new Error('Boom')
+  throw new Error('ssr-throw')
 }
 
 export function Thrower() {

test/e2e/app-dir/server-source-maps/fixtures/default/app/ssr-error-log-ignore-listed/page.js

@@ -2,14 +2,11 @@
 // Then change the `sources` entry in the sourcemap to `["custom://[badhost]/app/bad-sourcemap/page.js"]`
 // tsc compile errors can be ignored
 
-import { connection } from 'next/server'
-
 function logError() {
-  console.error(new Error('Boom!'))
+  console.error(new Error('bad-sourcemap'))
 }
 
-export default async function Page() {
-  await connection()
+export default function Page() {
   logError()
   return <p>Hello, Dave!</p>
 }

test/e2e/app-dir/server-source-maps/fixtures/default/app/ssr-throw/Thrower.js

@@ -1,5 +1,5 @@
 function logError() {
-  console.error(new Error('Boom'))
+  console.error(new Error('rsc-error-log'))
 }
 
 export default function Page() {