Skip webpack loader test in Turbopack (#60509)

## What?

This test can be skipped as it checks a webpack loader. 

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### What?

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Fixes #

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Closes NEXT-2054

test/development/acceptance-app/ReactRefreshRegression.test.ts

@@ -335,56 +335,60 @@ describe('ReactRefreshRegression app', () => {
   })
 
   // https://github.com/vercel/next.js/issues/13574
-  test('custom loader mdx should have Fast Refresh enabled', async () => {
-    const files = new Map()
-    files.set(
-      'next.config.js',
-      outdent`
+  // Test is skipped with Turbopack as the package uses webpack loaders
+  ;(process.env.TURBOPACK ? test.skip : test)(
+    'custom loader mdx should have Fast Refresh enabled',
+    async () => {
+      const files = new Map()
+      files.set(
+        'next.config.js',
+        outdent`
         const withMDX = require("@next/mdx")({
           extension: /\\.mdx?$/,
         });
         module.exports = withMDX({
           pageExtensions: ["js", "mdx"],
         });
       `
-    )
-    files.set('app/content.mdx', `Hello World!`)
-    files.set(
-      'app/page.js',
-      outdent`
+      )
+      files.set('app/content.mdx', `Hello World!`)
+      files.set(
+        'app/page.js',
+        outdent`
         'use client'
         import MDX from './content.mdx'
         export default function Page() {
           return <div id="content"><MDX /></div>
         }
       `
-    )
-
-    const { session, cleanup } = await sandbox(next, files)
-    expect(
-      await session.evaluate(
-        () => document.querySelector('#content').textContent
-      )
-    ).toBe('Hello World!')
-
-    let didNotReload = await session.patch('app/content.mdx', `Hello Foo!`)
-    expect(didNotReload).toBe(true)
-    expect(await session.hasRedbox(false)).toBe(false)
-    expect(
-      await session.evaluate(
-        () => document.querySelector('#content').textContent
       )
-    ).toBe('Hello Foo!')
 
-    didNotReload = await session.patch('app/content.mdx', `Hello Bar!`)
-    expect(didNotReload).toBe(true)
-    expect(await session.hasRedbox(false)).toBe(false)
-    expect(
-      await session.evaluate(
-        () => document.querySelector('#content').textContent
-      )
-    ).toBe('Hello Bar!')
-
-    await cleanup()
-  })
+      const { session, cleanup } = await sandbox(next, files)
+      expect(
+        await session.evaluate(
+          () => document.querySelector('#content').textContent
+        )
+      ).toBe('Hello World!')
+
+      let didNotReload = await session.patch('app/content.mdx', `Hello Foo!`)
+      expect(didNotReload).toBe(true)
+      expect(await session.hasRedbox(false)).toBe(false)
+      expect(
+        await session.evaluate(
+          () => document.querySelector('#content').textContent
+        )
+      ).toBe('Hello Foo!')
+
+      didNotReload = await session.patch('app/content.mdx', `Hello Bar!`)
+      expect(didNotReload).toBe(true)
+      expect(await session.hasRedbox(false)).toBe(false)
+      expect(
+        await session.evaluate(
+          () => document.querySelector('#content').textContent
+        )
+      ).toBe('Hello Bar!')
+
+      await cleanup()
+    }
+  )
 })

test/development/acceptance/ReactRefreshRegression.test.ts

@@ -295,49 +295,53 @@ describe('ReactRefreshRegression', () => {
   })
 
   // https://github.com/vercel/next.js/issues/13574
-  test('custom loader (mdx) should have Fast Refresh enabled', async () => {
-    const { session, cleanup } = await sandbox(
-      next,
-      new Map([
-        [
-          'next.config.js',
-          outdent`
+  // Test is skipped with Turbopack as the package uses webpack loaders
+  ;(process.env.TURBOPACK ? test.skip : test)(
+    'custom loader (mdx) should have Fast Refresh enabled',
+    async () => {
+      const { session, cleanup } = await sandbox(
+        next,
+        new Map([
+          [
+            'next.config.js',
+            outdent`
             const withMDX = require("@next/mdx")({
               extension: /\\.mdx?$/,
             });
             module.exports = withMDX({
               pageExtensions: ["js", "mdx"],
             });
           `,
-        ],
-        ['pages/mdx.mdx', `Hello World!`],
-      ]),
-      '/mdx'
-    )
-    expect(
-      await session.evaluate(
-        () => document.querySelector('#__next').textContent
+          ],
+          ['pages/mdx.mdx', `Hello World!`],
+        ]),
+        '/mdx'
       )
-    ).toBe('Hello World!')
-
-    let didNotReload = await session.patch('pages/mdx.mdx', `Hello Foo!`)
-    expect(didNotReload).toBe(true)
-    expect(await session.hasRedbox(false)).toBe(false)
-    expect(
-      await session.evaluate(
-        () => document.querySelector('#__next').textContent
-      )
-    ).toBe('Hello Foo!')
-
-    didNotReload = await session.patch('pages/mdx.mdx', `Hello Bar!`)
-    expect(didNotReload).toBe(true)
-    expect(await session.hasRedbox(false)).toBe(false)
-    expect(
-      await session.evaluate(
-        () => document.querySelector('#__next').textContent
-      )
-    ).toBe('Hello Bar!')
-
-    await cleanup()
-  })
+      expect(
+        await session.evaluate(
+          () => document.querySelector('#__next').textContent
+        )
+      ).toBe('Hello World!')
+
+      let didNotReload = await session.patch('pages/mdx.mdx', `Hello Foo!`)
+      expect(didNotReload).toBe(true)
+      expect(await session.hasRedbox(false)).toBe(false)
+      expect(
+        await session.evaluate(
+          () => document.querySelector('#__next').textContent
+        )
+      ).toBe('Hello Foo!')
+
+      didNotReload = await session.patch('pages/mdx.mdx', `Hello Bar!`)
+      expect(didNotReload).toBe(true)
+      expect(await session.hasRedbox(false)).toBe(false)
+      expect(
+        await session.evaluate(
+          () => document.querySelector('#__next').textContent
+        )
+      ).toBe('Hello Bar!')
+
+      await cleanup()
+    }
+  )
 })