test: add e2e plugin ordering assertion

test/basic.test.ts

@@ -983,6 +983,11 @@ describe('extends support', () => {
       const html = await $fetch('/foo')
       expect(html).toContain('Plugin | foo: String generated from foo plugin!')
     })
+
+    it('respects plugin ordering within layers', async () => {
+      const html = await $fetch('/plugins/ordering')
+      expect(html).toContain('catchall at plugins')
+    })
   })
 
   describe('server', () => {

test/fixtures/basic/extends/bar/plugins/09.layer-plugin-pre.ts

@@ -0,0 +1,3 @@
+export default defineNuxtPlugin((nuxtApp) => {
+  nuxtApp.provide('layerPluginPre', 'layer-plugin')
+})

test/fixtures/basic/extends/bar/plugins/11.layer-plugin-post.ts

@@ -0,0 +1,3 @@
+export default defineNuxtPlugin((nuxtApp) => {
+  nuxtApp.provide('layerPluginPost', 'layer-plugin')
+})

test/fixtures/basic/plugins/10.layer-ordering.ts

@@ -0,0 +1,10 @@
+export default defineNuxtPlugin((nuxtApp) => {
+  if (useRoute().path === '/plugins/ordering') {
+    if (!nuxtApp.$layerPluginPre) {
+      throw createError('layer plugin failed to run before end project plugin')
+    }
+    if (nuxtApp.$layerPluginPost) {
+      throw createError('layer plugin failed to run after end project plugin')
+    }
+  }
+})