test: add basic assertions for `unctx` transform

packages/nuxt/test/unctx-transform.test.ts

@@ -0,0 +1,67 @@
+import { describe, expect, it } from 'vitest'
+
+import { UnctxTransformPlugin } from '../src/core/plugins/unctx'
+
+describe('unctx transform in nuxt', () => {
+  it('should transform nuxt plugins', async () => {
+    const code = `
+      export default defineNuxtPlugin({
+        async setup () {
+          await Promise.resolve()
+        }
+      })
+    `
+    expect(await transform(code)).toMatchInlineSnapshot(`
+      "/* _processed_nuxt_unctx_transform */
+      import { executeAsync as __executeAsync } from "unctx";
+      export default defineNuxtPlugin({
+        async setup () {let __temp, __restore;
+          ;(([__temp,__restore]=__executeAsync(()=>Promise.resolve())),await __temp,__restore());
+        }
+      },1)"
+    `)
+  })
+
+  it('should transform vue components using defineNuxtComponent', async () => {
+    const code = `
+      definePageMeta({
+        async middleware() {
+          await Promise.resolve()
+        }
+      })
+      export default defineNuxtComponent({
+        async setup () {
+          await Promise.resolve()
+        }
+      })
+    `
+    expect(await transform(code, 'app.ts')).toMatchInlineSnapshot(`
+      "/* _processed_nuxt_unctx_transform */
+      import { executeAsync as __executeAsync } from "unctx";
+      definePageMeta({
+        async middleware() {let __temp, __restore;
+          ;(([__temp,__restore]=__executeAsync(()=>Promise.resolve())),await __temp,__restore());
+        }
+      })
+      export default defineNuxtComponent({
+        async setup () {let __temp, __restore;
+          ;(([__temp,__restore]=__executeAsync(()=>Promise.resolve())),await __temp,__restore());
+        }
+      })"
+    `)
+  })
+})
+
+function transform (code: string, id = 'app.vue') {
+  const transformerOptions = {
+    helperModule: 'unctx',
+    asyncFunctions: ['defineNuxtPlugin', 'defineNuxtRouteMiddleware'],
+    objectDefinitions: {
+      defineNuxtComponent: ['asyncData', 'setup'],
+      defineNuxtPlugin: ['setup'],
+      definePageMeta: ['middleware', 'validate'],
+    },
+  }
+  const plugin = UnctxTransformPlugin.raw({ sourcemap: false, transformerOptions }, {} as any) as any
+  return plugin.transformInclude(id) ? Promise.resolve(plugin.transform(code)).then((r: any) => r?.code.replace(/^ {6}/gm, '').trim()) : null
+}