Nuxt/packages/nuxt/test/islandTransform.test.ts

import { describe, expect, it, vi } from 'vitest'
import type { Plugin } from 'vite'
import type { Component } from '@nuxt/schema'
import type { UnpluginOptions } from 'unplugin'
import { islandsTransform } from '../src/components/islandsTransform'
import { normalizeLineEndings } from './utils'

const getComponents = () => [{
  filePath: '/root/hello.server.vue',
  mode: 'server',
  pascalName: 'HelloWorld',
  island: true,
  kebabName: 'hello-world',
  chunkName: 'components/hello-world',
  export: 'default',
  shortPath: '',
  prefetch: false,
  preload: false
}] as Component[]

const pluginWebpack = islandsTransform.raw({
  getComponents,
  selectiveClient: true
}, { framework: 'webpack', webpack: { compiler: {} as any } })

const viteTransform = async (source: string, id: string, isDev = false, selectiveClient = false) => {
  const vitePlugin = islandsTransform.raw({
    getComponents,
    rootDir: '/root',
    isDev,
    selectiveClient
  }, { framework: 'vite' }) as Plugin

  const result = await (vitePlugin.transform! as Function)(source, id)
  return typeof result === 'string' ? result : result?.code
}

const webpackTransform = async (source: string, id: string) => {
  const result = await ((pluginWebpack as UnpluginOptions).transform! as Function)(source, id)
  return typeof result === 'string' ? result : result?.code
}

describe('islandTransform - server and island components', () => {
  describe('slots', () => {
    it('expect slot transform to match inline snapshot', async () => {
      const result = await viteTransform(`<template>
      <div>
        <slot />

        <slot name="named" :some-data="someData" />
        <slot
          name="other"
          :some-data="someData"
        />
      </div>
      </template>
      <script setup lang="ts">
      const someData = 'some data'

      </script>`
      , 'hello.server.vue')

      expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
        "<template>
              <div>
                <div style="display: contents;" nuxt-ssr-slot-name="default" />

                <div style="display: contents;" nuxt-ssr-slot-name="named" :nuxt-ssr-slot-data="JSON.stringify([{ some-data: someData }])"/>
                <div style="display: contents;" nuxt-ssr-slot-name="other" :nuxt-ssr-slot-data="JSON.stringify([{ some-data: someData }])"/>
              </div>
              </template>
              <script setup lang="ts">
        import { vforToArray as __vforToArray } from '#app/components/utils'
        import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
              const someData = 'some data'

              </script>"
      `)
    })

    it('expect slot fallback transform to match inline snapshot', async () => {
      const result = await viteTransform(`<template>
      <div>
        <slot :some-data="someData">
          <div>fallback</div>
        </slot>
      </div>
      </template>
      <script setup lang="ts">
      const someData = 'some data'

      </script>`
      , 'hello.server.vue')

      expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
        "<template>
              <div>
                <div style="display: contents;" nuxt-ssr-slot-name="default" :nuxt-ssr-slot-data="JSON.stringify([{ some-data: someData }])"><div nuxt-slot-fallback-start="default"/><div  style="display: contents;">
                  <div>fallback</div>
                </div><div nuxt-slot-fallback-end/></div>
              </div>
              </template>
              <script setup lang="ts">
        import { vforToArray as __vforToArray } from '#app/components/utils'
        import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
              const someData = 'some data'

              </script>"
      `)
    })

    it('expect slot transform with fallback and no name to match inline snapshot #23209', async () => {
      const result = await viteTransform(`<template>
      <div>
        <UCard>
          <template #header>
            <h3>Partial Hydration Example - Server - {{ count }}</h3>
          </template>
          <template #default>
            <p>message: {{ message }}</p>
            <p>Below is the slot I want to be hydrated on the client</p>
            <div>
              <slot>
                This is the default content of the slot, I should not see this after
                the client loading has completed.
              </slot>
            </div>
            <p>Above is the slot I want to be hydrated on the client</p>
          </template>
        </UCard>
      </div>
    </template>

    <script setup lang="ts">
    export interface Props {
      count?: number;
    }
    const props = withDefaults(defineProps<Props>(), { count: 0 });

    const message = "Hello World";
    </script>
    `
      , 'hello.server.vue')

      expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
        "<template>
              <div>
                <UCard>
                  <template #header>
                    <h3>Partial Hydration Example - Server - {{ count }}</h3>
                  </template>
                  <template #default>
                    <p>message: {{ message }}</p>
                    <p>Below is the slot I want to be hydrated on the client</p>
                    <div>
                      <div style="display: contents;" nuxt-ssr-slot-name="default" ><div nuxt-slot-fallback-start="default"/>
                        This is the default content of the slot, I should not see this after
                        the client loading has completed.
                      <div nuxt-slot-fallback-end/></div>
                    </div>
                    <p>Above is the slot I want to be hydrated on the client</p>
                  </template>
                </UCard>
              </div>
            </template>

            <script setup lang="ts">
        import { vforToArray as __vforToArray } from '#app/components/utils'
        import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
            export interface Props {
              count?: number;
            }
            const props = withDefaults(defineProps<Props>(), { count: 0 });

            const message = "Hello World";
            </script>
            "
      `)
    })
  })

  describe('nuxt-client', () => {
    describe('vite', () => {
      it('test transform with vite in dev', async () => {
        const result = await viteTransform(`<template>
        <div>
          <!-- should not be wrapped by NuxtTeleportSsrClient -->
          <HelloWorld />
          <!-- should be wrapped by NuxtTeleportSsrClient with a rootDir attr -->
          <HelloWorld nuxt-client />
        </div>
      </template>
      
      <script setup lang="ts">
      import HelloWorld from './HelloWorld.vue'
      </script>
      `, 'hello.server.vue', true, true)

        expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
          "<template>
                  <div>
                    <!-- should not be wrapped by NuxtTeleportSsrClient -->
                    <HelloWorld />
                    <!-- should be wrapped by NuxtTeleportSsrClient with a rootDir attr -->
                    <NuxtTeleportSsrClient to="HelloWorld-PIVollAJCe" root-dir="/root" :nuxt-client="true"><HelloWorld /></NuxtTeleportSsrClient>
                  </div>
                </template>
                
                <script setup lang="ts">
          import { vforToArray as __vforToArray } from '#app/components/utils'
          import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
                import HelloWorld from './HelloWorld.vue'
                </script>
                "
        `)
        // root-dir prop should never be used in production
        expect(result).toContain('root-dir="/root"')
      })

      it('test transform with vite in prod', async () => {
        const result = await viteTransform(`<template>
        <div>
          <HelloWorld />
          <HelloWorld nuxt-client />
        </div>
      </template>
      
      <script setup lang="ts">
      import HelloWorld from './HelloWorld.vue'
      </script>
      `, 'hello.server.vue', false, true)

        expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
          "<template>
                  <div>
                    <HelloWorld />
                    <NuxtTeleportSsrClient to="HelloWorld-CyH3UXLuYA"  :nuxt-client="true"><HelloWorld /></NuxtTeleportSsrClient>
                  </div>
                </template>
                
                <script setup lang="ts">
          import { vforToArray as __vforToArray } from '#app/components/utils'
          import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
                import HelloWorld from './HelloWorld.vue'
                </script>
                "
        `)

        // root-dir prop should never be used in production
        expect(result).not.toContain('root-dir="')
      })

      it('test dynamic nuxt-client', async () => {
        const result = await viteTransform(`<template>
        <div>
          <HelloWorld />
          <HelloWorld :nuxt-client="nuxtClient" />
        </div>
      </template>
      
      <script setup lang="ts">
      import HelloWorld from './HelloWorld.vue'

      const nuxtClient = false
      </script>
      `, 'hello.server.vue', false, true)

        expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
          "<template>
                  <div>
                    <HelloWorld />
                    <NuxtTeleportSsrClient to="HelloWorld-eo0XycWCUV"  :nuxt-client="nuxtClient"><HelloWorld :nuxt-client="nuxtClient" /></NuxtTeleportSsrClient>
                  </div>
                </template>
                
                <script setup lang="ts">
          import { vforToArray as __vforToArray } from '#app/components/utils'
          import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
                import HelloWorld from './HelloWorld.vue'

                const nuxtClient = false
                </script>
                "
        `)
      })

      it('should not transform if disabled', async () => {
        const result = await viteTransform(`<template>
        <div>
          <HelloWorld />
          <HelloWorld :nuxt-client="nuxtClient" />
        </div>
      </template>
      
      <script setup lang="ts">
      import HelloWorld from './HelloWorld.vue'

      const nuxtClient = false
      </script>
      `, 'hello.server.vue', false, false)

        expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
          "<template>
                  <div>
                    <HelloWorld />
                    <HelloWorld :nuxt-client="nuxtClient" />
                  </div>
                </template>
                
                <script setup lang="ts">
          import { vforToArray as __vforToArray } from '#app/components/utils'
          import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
                import HelloWorld from './HelloWorld.vue'

                const nuxtClient = false
                </script>
                "
        `)
      })
    })

    describe('webpack', () => {
      it('test transform with webpack', async () => {
        const spyOnWarn = vi.spyOn(console, 'warn')
        const result = await webpackTransform(`<template>
        <div>
          <!-- should not be wrapped by NuxtTeleportSsrClient -->
          <HelloWorld />
      
          <!-- should be not wrapped by NuxtTeleportSsrClient for now -->
          <HelloWorld nuxt-client />
        </div>
      </template>
      
      <script setup lang="ts">
      import HelloWorld from './HelloWorld.vue'
      
      const someData = 'some data'
      </script>
      `, 'hello.server.vue')
        expect(normalizeLineEndings(result)).toMatchInlineSnapshot(`
          "<template>
                  <div>
                    <!-- should not be wrapped by NuxtTeleportSsrClient -->
                    <HelloWorld />
                
                    <!-- should be not wrapped by NuxtTeleportSsrClient for now -->
                    <HelloWorld nuxt-client />
                  </div>
                </template>
                
                <script setup lang="ts">
          import { vforToArray as __vforToArray } from '#app/components/utils'
          import NuxtTeleportSsrClient from '#app/components/nuxt-teleport-ssr-client'
                import HelloWorld from './HelloWorld.vue'
                
                const someData = 'some data'
                </script>
                "
        `)

        expect(spyOnWarn).toHaveBeenCalledWith('nuxt-client attribute and client components within islands is only supported with Vite. file: hello.server.vue')
      })
    })
  })
})