core/packages/compiler-sfc/__tests__/compileScript.spec.ts

import { BindingTypes } from '@vue/compiler-core'
import { compileSFCScript as compile, assertCode, mockId } from './utils'

describe('SFC compile <script setup>', () => {
  test('should compile JS syntax', () => {
    const { content } = compile(`
      <script setup lang='js'>
      const a = 1
      const b = 2
      </script>
    `)
    expect(content).toMatch(`return { a, b }`)
    assertCode(content)
  })

  test('should expose top level declarations', () => {
    const { content, bindings } = compile(`
      <script setup>
      import { x } from './x'
      let a = 1
      const b = 2
      function c() {}
      class d {}
      </script>

      <script>
      import { xx } from './x'
      let aa = 1
      const bb = 2
      function cc() {}
      class dd {}
      </script>
      `)
    expect(content).toMatch(
      `return { get aa() { return aa }, set aa(v) { aa = v }, ` +
        `bb, cc, dd, get a() { return a }, set a(v) { a = v }, b, c, d, ` +
        `get xx() { return xx }, get x() { return x } }`
    )
    expect(bindings).toStrictEqual({
      x: BindingTypes.SETUP_MAYBE_REF,
      a: BindingTypes.SETUP_LET,
      b: BindingTypes.SETUP_CONST,
      c: BindingTypes.SETUP_CONST,
      d: BindingTypes.SETUP_CONST,
      xx: BindingTypes.SETUP_MAYBE_REF,
      aa: BindingTypes.SETUP_LET,
      bb: BindingTypes.LITERAL_CONST,
      cc: BindingTypes.SETUP_CONST,
      dd: BindingTypes.SETUP_CONST
    })
    assertCode(content)
  })

  test('binding analysis for destructure', () => {
    const { content, bindings } = compile(`
      <script setup>
      const { foo, b: bar, ['x' + 'y']: baz, x: { y, zz: { z }}} = {}
      </script>
      `)
    expect(content).toMatch('return { foo, bar, baz, y, z }')
    expect(bindings).toStrictEqual({
      foo: BindingTypes.SETUP_MAYBE_REF,
      bar: BindingTypes.SETUP_MAYBE_REF,
      baz: BindingTypes.SETUP_MAYBE_REF,
      y: BindingTypes.SETUP_MAYBE_REF,
      z: BindingTypes.SETUP_MAYBE_REF
    })
    assertCode(content)
  })

  test('defineProps()', () => {
    const { content, bindings } = compile(`
<script setup>
const props = defineProps({
  foo: String
})
const bar = 1
</script>
  `)
    // should generate working code
    assertCode(content)
    // should analyze bindings
    expect(bindings).toStrictEqual({
      foo: BindingTypes.PROPS,
      bar: BindingTypes.LITERAL_CONST,
      props: BindingTypes.SETUP_REACTIVE_CONST
    })

    // should remove defineOptions import and call
    expect(content).not.toMatch('defineProps')
    // should generate correct setup signature
    expect(content).toMatch(`setup(__props, { expose: __expose }) {`)
    // should assign user identifier to it
    expect(content).toMatch(`const props = __props`)
    // should include context options in default export
    expect(content).toMatch(`export default {
  props: {
  foo: String
},`)
  })

  test('defineProps w/ external definition', () => {
    const { content } = compile(`
    <script setup>
    import { propsModel } from './props'
    const props = defineProps(propsModel)
    </script>
      `)
    assertCode(content)
    expect(content).toMatch(`export default {
  props: propsModel,`)
  })

  // #4764
  test('defineProps w/ leading code', () => {
    const { content } = compile(`
    <script setup>import { x } from './x'
    const props = defineProps({})
    </script>
    `)
    // props declaration should be inside setup, not moved along with the import
    expect(content).not.toMatch(`const props = __props\nimport`)
    assertCode(content)
  })

  test('defineEmits()', () => {
    const { content, bindings } = compile(`
<script setup>
const myEmit = defineEmits(['foo', 'bar'])
</script>
  `)
    assertCode(content)
    expect(bindings).toStrictEqual({
      myEmit: BindingTypes.SETUP_CONST
    })
    // should remove defineEmits import and call
    expect(content).not.toMatch('defineEmits')
    // should generate correct setup signature
    expect(content).toMatch(
      `setup(__props, { expose: __expose, emit: myEmit }) {`
    )
    // should include context options in default export
    expect(content).toMatch(`export default {
  emits: ['foo', 'bar'],`)
  })

  test('defineProps/defineEmits in multi-variable declaration', () => {
    const { content } = compile(`
    <script setup>
    const props = defineProps(['item']),
      a = 1,
      emit = defineEmits(['a']);
    </script>
  `)
    assertCode(content)
    expect(content).toMatch(`const a = 1;`) // test correct removal
    expect(content).toMatch(`props: ['item'],`)
    expect(content).toMatch(`emits: ['a'],`)
  })

  // #6757
  test('defineProps/defineEmits in multi-variable declaration fix #6757 ', () => {
    const { content } = compile(`
    <script setup>
    const a = 1,
          props = defineProps(['item']),
          emit = defineEmits(['a']);
    </script>
  `)
    assertCode(content)
    expect(content).toMatch(`const a = 1;`) // test correct removal
    expect(content).toMatch(`props: ['item'],`)
    expect(content).toMatch(`emits: ['a'],`)
  })

  // #7422
  test('defineProps/defineEmits in multi-variable declaration fix #7422', () => {
    const { content } = compile(`
    <script setup>
    const props = defineProps(['item']),
          emits = defineEmits(['foo']),
          a = 0,
          b = 0;
    </script>
  `)
    assertCode(content)
    expect(content).toMatch(`props: ['item'],`)
    expect(content).toMatch(`emits: ['foo'],`)
    expect(content).toMatch(`const a = 0,`)
    expect(content).toMatch(`b = 0;`)
  })

  test('defineProps/defineEmits in multi-variable declaration (full removal)', () => {
    const { content } = compile(`
    <script setup>
    const props = defineProps(['item']),
          emit = defineEmits(['a']);
    </script>
  `)
    assertCode(content)
    expect(content).toMatch(`props: ['item'],`)
    expect(content).toMatch(`emits: ['a'],`)
  })

  describe('defineOptions()', () => {
    test('basic usage', () => {
      const { content } = compile(`
        <script setup>
        defineOptions({ name: 'FooApp' })
        </script>
      `)
      assertCode(content)
      // should remove defineOptions import and call
      expect(content).not.toMatch('defineOptions')
      // should include context options in default export
      expect(content).toMatch(
        `export default /*#__PURE__*/Object.assign({ name: 'FooApp' }, `
      )
    })

    test('empty argument', () => {
      const { content } = compile(`
        <script setup>
        defineOptions()
        </script>
      `)
      assertCode(content)
      expect(content).toMatch(`export default {`)
      // should remove defineOptions import and call
      expect(content).not.toMatch('defineOptions')
    })

    it('should emit an error with two defineProps', () => {
      expect(() =>
        compile(`
        <script setup>
        defineOptions({ name: 'FooApp' })
        defineOptions({ name: 'BarApp' })
        </script>
        `)
      ).toThrowError('[@vue/compiler-sfc] duplicate defineOptions() call')
    })

    it('should emit an error with props or emits property', () => {
      expect(() =>
        compile(`
        <script setup>
        defineOptions({ props: { foo: String } })
        </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare props. Use defineProps() instead.'
      )

      expect(() =>
        compile(`
        <script setup>
        defineOptions({ emits: ['update'] })
        </script>
      `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare emits. Use defineEmits() instead.'
      )

      expect(() =>
        compile(`
        <script setup>
        defineOptions({ expose: ['foo'] })
        </script>
      `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare expose. Use defineExpose() instead.'
      )

      expect(() =>
        compile(`
        <script setup>
        defineOptions({ slots: ['foo'] })
        </script>
      `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare slots. Use defineSlots() instead.'
      )
    })

    it('should emit an error with type generic', () => {
      expect(() =>
        compile(`
        <script setup lang="ts">
        defineOptions<{ name: 'FooApp' }>()
        </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot accept type arguments'
      )
    })

    it('should emit an error with type assertion', () => {
      expect(() =>
        compile(`
        <script setup lang="ts">
        defineOptions({ props: [] } as any)
        </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare props. Use defineProps() instead.'
      )
    })

    it('should emit an error with declaring props/emits/slots/expose', () => {
      expect(() =>
        compile(`
          <script setup>
          defineOptions({ props: ['foo'] })
          </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare props. Use defineProps() instead'
      )

      expect(() =>
        compile(`
          <script setup>
          defineOptions({ emits: ['update'] })
          </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare emits. Use defineEmits() instead'
      )

      expect(() =>
        compile(`
          <script setup>
          defineOptions({ expose: ['foo'] })
          </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare expose. Use defineExpose() instead'
      )

      expect(() =>
        compile(`
          <script setup lang="ts">
          defineOptions({ slots: Object })
          </script>
        `)
      ).toThrowError(
        '[@vue/compiler-sfc] defineOptions() cannot be used to declare slots. Use defineSlots() instead'
      )
    })
  })

  test('defineExpose()', () => {
    const { content } = compile(`
<script setup>
defineExpose({ foo: 123 })
</script>
  `)
    assertCode(content)
    // should remove defineOptions import and call
    expect(content).not.toMatch('defineExpose')
    // should generate correct setup signature
    expect(content).toMatch(`setup(__props, { expose: __expose }) {`)
    // should replace callee
    expect(content).toMatch(/\b__expose\(\{ foo: 123 \}\)/)
  })

  describe('defineModel()', () => {
    test('basic usage', () => {
      const { content, bindings } = compile(
        `
        <script setup>
        const modelValue = defineModel({ required: true })
        const c = defineModel('count')
        </script>
        `,
        { defineModel: true }
      )
      assertCode(content)
      expect(content).toMatch('props: {')
      expect(content).toMatch('"modelValue": { required: true },')
      expect(content).toMatch('"count": {},')
      expect(content).toMatch('emits: ["update:modelValue", "update:count"],')
      expect(content).toMatch(
        `const modelValue = _useModel(__props, "modelValue")`
      )
      expect(content).toMatch(`const c = _useModel(__props, "count")`)
      expect(content).toMatch(`return { modelValue, c }`)
      expect(content).not.toMatch('defineModel')

      expect(bindings).toStrictEqual({
        modelValue: BindingTypes.SETUP_REF,
        count: BindingTypes.PROPS,
        c: BindingTypes.SETUP_REF
      })
    })

    test('w/ defineProps and defineEmits', () => {
      const { content, bindings } = compile(
        `
        <script setup>
        defineProps({ foo: String })
        defineEmits(['change'])
        const count = defineModel({ default: 0 })
        </script>
      `,
        { defineModel: true }
      )
      assertCode(content)
      expect(content).toMatch(`props: _mergeModels({ foo: String }`)
      expect(content).toMatch(`"modelValue": { default: 0 }`)
      expect(content).toMatch(`const count = _useModel(__props, "modelValue")`)
      expect(content).not.toMatch('defineModel')
      expect(bindings).toStrictEqual({
        count: BindingTypes.SETUP_REF,
        foo: BindingTypes.PROPS,
        modelValue: BindingTypes.PROPS
      })
    })

    test('w/ array props', () => {
      const { content, bindings } = compile(
        `
        <script setup>
        defineProps(['foo', 'bar'])
        const count = defineModel('count')
        </script>
      `,
        { defineModel: true }
      )
      assertCode(content)
      expect(content).toMatch(`props: _mergeModels(['foo', 'bar'], {
    "count": {},
  })`)
      expect(content).toMatch(`const count = _useModel(__props, "count")`)
      expect(content).not.toMatch('defineModel')
      expect(bindings).toStrictEqual({
        foo: BindingTypes.PROPS,
        bar: BindingTypes.PROPS,
        count: BindingTypes.SETUP_REF
      })
    })

    test('w/ local flag', () => {
      const { content } = compile(
        `<script setup>
        const foo = defineModel({ local: true, default: 1 })
        const bar = defineModel('bar', { [key]: true })
        const baz = defineModel('baz', { ...x })
        const qux = defineModel('qux', x)

        const foo2 = defineModel('foo2', { local: true, ...x })

        const local = true
        const hoist = defineModel('hoist', { local })
        </script>`,
        { defineModel: true }
      )
      assertCode(content)
      expect(content).toMatch(
        `_useModel(__props, "modelValue", { local: true })`
      )
      expect(content).toMatch(`_useModel(__props, "bar", { [key]: true })`)
      expect(content).toMatch(`_useModel(__props, "baz", { ...x })`)
      expect(content).toMatch(`_useModel(__props, "qux", x)`)
      expect(content).toMatch(`_useModel(__props, "foo2", { local: true })`)
      expect(content).toMatch(`_useModel(__props, "hoist", { local })`)
    })
  })

  test('<script> after <script setup> the script content not end with `\\n`', () => {
    const { content } = compile(`
    <script setup>
    import { x } from './x'
    </script>
    <script>const n = 1</script>
    `)
    assertCode(content)
  })

  describe('<script> and <script setup> co-usage', () => {
    test('script first', () => {
      const { content } = compile(`
      <script>
      export const n = 1

      export default {}
      </script>
      <script setup>
      import { x } from './x'
      x()
      </script>
      `)
      assertCode(content)
    })

    test('script setup first', () => {
      const { content } = compile(`
      <script setup>
      import { x } from './x'
      x()
      </script>
      <script>
      export const n = 1
      export default {}
      </script>
      `)
      assertCode(content)
    })

    test('script setup first, named default export', () => {
      const { content } = compile(`
      <script setup>
      import { x } from './x'
      x()
      </script>
      <script>
      export const n = 1
      const def = {}
      export { def as default }
      </script>
      `)
      assertCode(content)
    })

    // #4395
    test('script setup first, lang="ts", script block content export default', () => {
      const { content } = compile(`
      <script setup lang="ts">
      import { x } from './x'
      x()
      </script>
      <script lang="ts">
      export default {
        name: "test"
      }
      </script>
      `)
      // ensure __default__ is declared before used
      expect(content).toMatch(/const __default__[\S\s]*\.\.\.__default__/m)
      assertCode(content)
    })

    describe('spaces in ExportDefaultDeclaration node', () => {
      // #4371
      test('with many spaces and newline', () => {
        // #4371
        const { content } = compile(`
        <script>
        export const n = 1
        export        default
        {
          some:'option'
        }
        </script>
        <script setup>
        import { x } from './x'
        x()
        </script>
        `)
        assertCode(content)
      })

      test('with minimal spaces', () => {
        const { content } = compile(`
        <script>
        export const n = 1
        export default{
          some:'option'
        }
        </script>
        <script setup>
        import { x } from './x'
        x()
        </script>
        `)
        assertCode(content)
      })
    })

    test('export call expression as default', () => {
      const { content } = compile(`
      <script>
      function fn() {
        return "hello, world";
      }
      export default fn();
      </script>

      <script setup>
      console.log('foo')
      </script>
      `)
      assertCode(content)
    })
  })

  describe('imports', () => {
    test('should hoist and expose imports', () => {
      assertCode(
        compile(`<script setup>
          import { ref } from 'vue'
          import 'foo/css'
        </script>`).content
      )
    })

    test('should extract comment for import or type declarations', () => {
      assertCode(
        compile(`
        <script setup>
        import a from 'a' // comment
        import b from 'b'
        </script>
        `).content
      )
    })

    // #2740
    test('should allow defineProps/Emit at the start of imports', () => {
      assertCode(
        compile(`<script setup>
      import { ref } from 'vue'
      defineProps(['foo'])
      defineEmits(['bar'])
      const r = ref(0)
      </script>`).content
      )
    })

    test('dedupe between user & helper', () => {
      const { content } = compile(
        `
      <script setup>
      import { ref } from 'vue'
      let foo = $ref(1)
      </script>
      `,
        { reactivityTransform: true }
      )
      assertCode(content)
      expect(content).toMatch(`import { ref } from 'vue'`)
    })

    test('import dedupe between <script> and <script setup>', () => {
      const { content } = compile(`
        <script>
        import { x } from './x'
        </script>
        <script setup>
        import { x } from './x'
        x()
        </script>
        `)
      assertCode(content)
      expect(content.indexOf(`import { x }`)).toEqual(
        content.lastIndexOf(`import { x }`)
      )
    })

    describe('import ref/reactive function from other place', () => {
      test('import directly', () => {
        const { bindings } = compile(`
        <script setup>
          import { ref, reactive } from './foo'

          const foo = ref(1)
          const bar = reactive(1)
        </script>
      `)
        expect(bindings).toStrictEqual({
          ref: BindingTypes.SETUP_MAYBE_REF,
          reactive: BindingTypes.SETUP_MAYBE_REF,
          foo: BindingTypes.SETUP_MAYBE_REF,
          bar: BindingTypes.SETUP_MAYBE_REF
        })
      })

      test('import w/ alias', () => {
        const { bindings } = compile(`
        <script setup>
          import { ref as _ref, reactive as _reactive } from './foo'

          const foo = ref(1)
          const bar = reactive(1)
        </script>
      `)
        expect(bindings).toStrictEqual({
          _reactive: BindingTypes.SETUP_MAYBE_REF,
          _ref: BindingTypes.SETUP_MAYBE_REF,
          foo: BindingTypes.SETUP_MAYBE_REF,
          bar: BindingTypes.SETUP_MAYBE_REF
        })
      })

      test('aliased usage before import site', () => {
        const { bindings } = compile(`
        <script setup>
          const bar = x(1)
          import { reactive as x } from 'vue'
        </script>
      `)
        expect(bindings).toStrictEqual({
          bar: BindingTypes.SETUP_REACTIVE_CONST,
          x: BindingTypes.SETUP_CONST
        })
      })
    })

    test('should support module string names syntax', () => {
      const { content, bindings } = compile(`
      <script>
        import { "😏" as foo } from './foo'
      </script>
      <script setup>
        import { "😏" as foo } from './foo'
      </script>
    `)
      assertCode(content)
      expect(bindings).toStrictEqual({
        foo: BindingTypes.SETUP_MAYBE_REF
      })
    })
  })

  // in dev mode, declared bindings are returned as an object from setup()
  // when using TS, users may import types which should not be returned as
  // values, so we need to check import usage in the template to determine
  // what to be returned.
  describe('dev mode import usage check', () => {
    test('components', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { FooBar, FooBaz, FooQux, foo } from './x'
        const fooBar: FooBar = 1
        </script>
        <template>
          <FooBaz></FooBaz>
          <foo-qux/>
          <foo/>
          FooBar
        </template>
        `)
      // FooBar: should not be matched by plain text or incorrect case
      // FooBaz: used as PascalCase component
      // FooQux: used as kebab-case component
      // foo: lowercase component
      expect(content).toMatch(
        `return { fooBar, get FooBaz() { return FooBaz }, ` +
          `get FooQux() { return FooQux }, get foo() { return foo } }`
      )
      assertCode(content)
    })

    test('directive', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { vMyDir } from './x'
        </script>
        <template>
          <div v-my-dir></div>
        </template>
        `)
      expect(content).toMatch(`return { get vMyDir() { return vMyDir } }`)
      assertCode(content)
    })

    // https://github.com/vuejs/core/issues/4599
    test('attribute expressions', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { bar, baz } from './x'
        const cond = true
        </script>
        <template>
          <div :class="[cond ? '' : bar(), 'default']" :style="baz"></div>
        </template>
        `)
      expect(content).toMatch(
        `return { cond, get bar() { return bar }, get baz() { return baz } }`
      )
      assertCode(content)
    })

    test('vue interpolations', () => {
      const { content } = compile(`
      <script setup lang="ts">
      import { x, y, z, x$y } from './x'
      </script>
      <template>
        <div :id="z + 'y'">{{ x }} {{ yy }} {{ x$y }}</div>
      </template>
      `)
      // x: used in interpolation
      // y: should not be matched by {{ yy }} or 'y' in binding exps
      // x$y: #4274 should escape special chars when creating Regex
      expect(content).toMatch(
        `return { get x() { return x }, get z() { return z }, get x$y() { return x$y } }`
      )
      assertCode(content)
    })

    // #4340 interpolations in template strings
    test('js template string interpolations', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { VAR, VAR2, VAR3 } from './x'
        </script>
        <template>
          {{ \`\${VAR}VAR2\${VAR3}\` }}
        </template>
        `)
      // VAR2 should not be matched
      expect(content).toMatch(
        `return { get VAR() { return VAR }, get VAR3() { return VAR3 } }`
      )
      assertCode(content)
    })

    // edge case: last tag in template
    test('last tag', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { FooBaz, Last } from './x'
        </script>
        <template>
          <FooBaz></FooBaz>
          <Last/>
        </template>
        `)
      expect(content).toMatch(
        `return { get FooBaz() { return FooBaz }, get Last() { return Last } }`
      )
      assertCode(content)
    })

    test('TS annotations', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { Foo, Bar, Baz, Qux, Fred } from './x'
        const a = 1
        function b() {}
        </script>
        <template>
          {{ a as Foo }}
          {{ b<Bar>() }}
          {{ Baz }}
          <Comp v-slot="{ data }: Qux">{{ data }}</Comp>
          <div v-for="{ z = x as Qux } in list as Fred"/>
        </template>
        `)
      expect(content).toMatch(`return { a, b, get Baz() { return Baz } }`)
      assertCode(content)
    })

    // vuejs/vue#12591
    test('v-on inline statement', () => {
      // should not error
      compile(`
      <script setup lang="ts">
        import { foo } from './foo'
      </script>
      <template>
        <div @click="$emit('update:a');"></div>
      </template>
      `)
    })
  })

  describe('inlineTemplate mode', () => {
    test('should work', () => {
      const { content } = compile(
        `
        <script setup>
        import { ref } from 'vue'
        const count = ref(0)
        </script>
        <template>
          <div>{{ count }}</div>
          <div>static</div>
        </template>
        `,
        { inlineTemplate: true }
      )
      // check snapshot and make sure helper imports and
      // hoists are placed correctly.
      assertCode(content)
      // in inline mode, no need to call expose() since nothing is exposed
      // anyway!
      expect(content).not.toMatch(`expose()`)
    })

    test('with defineExpose()', () => {
      const { content } = compile(
        `
        <script setup>
        const count = ref(0)
        defineExpose({ count })
        </script>
        `,
        { inlineTemplate: true }
      )
      assertCode(content)
      expect(content).toMatch(`setup(__props, { expose: __expose })`)
      expect(content).toMatch(`expose({ count })`)
    })

    test('referencing scope components and directives', () => {
      const { content } = compile(
        `
        <script setup>
        import ChildComp from './Child.vue'
        import SomeOtherComp from './Other.vue'
        import vMyDir from './my-dir'
        </script>
        <template>
          <div v-my-dir></div>
          <ChildComp/>
          <some-other-comp/>
        </template>
        `,
        { inlineTemplate: true }
      )
      expect(content).toMatch('[_unref(vMyDir)]')
      expect(content).toMatch('_createVNode(ChildComp)')
      // kebab-case component support
      expect(content).toMatch('_createVNode(SomeOtherComp)')
      assertCode(content)
    })

    test('avoid unref() when necessary', () => {
      // function, const, component import
      const { content } = compile(
        `<script setup>
        import { ref } from 'vue'
        import Foo, { bar } from './Foo.vue'
        import other from './util'
        import * as tree from './tree'
        const count = ref(0)
        const constant = {}
        const maybe = foo()
        let lett = 1
        function fn() {}
        </script>
        <template>
          <Foo>{{ bar }}</Foo>
          <div @click="fn">{{ count }} {{ constant }} {{ maybe }} {{ lett }} {{ other }}</div>
          {{ tree.foo() }}
        </template>
        `,
        { inlineTemplate: true }
      )
      // no need to unref vue component import
      expect(content).toMatch(`createVNode(Foo,`)
      // #2699 should unref named imports from .vue
      expect(content).toMatch(`unref(bar)`)
      // should unref other imports
      expect(content).toMatch(`unref(other)`)
      // no need to unref constant literals
      expect(content).not.toMatch(`unref(constant)`)
      // should directly use .value for known refs
      expect(content).toMatch(`count.value`)
      // should unref() on const bindings that may be refs
      expect(content).toMatch(`unref(maybe)`)
      // should unref() on let bindings
      expect(content).toMatch(`unref(lett)`)
      // no need to unref namespace import (this also preserves tree-shaking)
      expect(content).toMatch(`tree.foo()`)
      // no need to unref function declarations
      expect(content).toMatch(`{ onClick: fn }`)
      // no need to mark constant fns in patch flag
      expect(content).not.toMatch(`PROPS`)
      assertCode(content)
    })

    test('v-model codegen', () => {
      const { content } = compile(
        `<script setup>
        import { ref } from 'vue'
        const count = ref(0)
        const maybe = foo()
        let lett = 1
        </script>
        <template>
          <input v-model="count">
          <input v-model="maybe">
          <input v-model="lett">
        </template>
        `,
        { inlineTemplate: true }
      )
      // known const ref: set value
      expect(content).toMatch(`(count).value = $event`)
      // const but maybe ref: assign if ref, otherwise do nothing
      expect(content).toMatch(`_isRef(maybe) ? (maybe).value = $event : null`)
      // let: handle both cases
      expect(content).toMatch(
        `_isRef(lett) ? (lett).value = $event : lett = $event`
      )
      assertCode(content)
    })

    test('v-model should not generate ref assignment code for non-setup bindings', () => {
      const { content } = compile(
        `<script setup>
        import { ref } from 'vue'
        const count = ref(0)
        </script>
        <script>
        export default {
          data() { return { foo: 123 } }
        }
        </script>
        <template>
          <input v-model="foo">
        </template>
        `,
        { inlineTemplate: true }
      )
      expect(content).not.toMatch(`_isRef(foo)`)
    })

    test('template assignment expression codegen', () => {
      const { content } = compile(
        `<script setup>
        import { ref } from 'vue'
        const count = ref(0)
        const maybe = foo()
        let lett = 1
        let v = ref(1)
        </script>
        <template>
          <div @click="count = 1"/>
          <div @click="maybe = count"/>
          <div @click="lett = count"/>
          <div @click="v += 1"/>
          <div @click="v -= 1"/>
          <div @click="() => {
              let a = '' + lett
              v = a
           }"/>
           <div @click="() => {
              // nested scopes
              (()=>{
                let x = a
                (()=>{
                  let z = x
                  let z2 = z
                })
                let lz = z
              })
              v = a
           }"/>
        </template>
        `,
        { inlineTemplate: true }
      )
      // known const ref: set value
      expect(content).toMatch(`count.value = 1`)
      // const but maybe ref: only assign after check
      expect(content).toMatch(`maybe.value = count.value`)
      // let: handle both cases
      expect(content).toMatch(
        `_isRef(lett) ? lett.value = count.value : lett = count.value`
      )
      expect(content).toMatch(`_isRef(v) ? v.value += 1 : v += 1`)
      expect(content).toMatch(`_isRef(v) ? v.value -= 1 : v -= 1`)
      expect(content).toMatch(`_isRef(v) ? v.value = a : v = a`)
      expect(content).toMatch(`_isRef(v) ? v.value = _ctx.a : v = _ctx.a`)
      assertCode(content)
    })

    test('template update expression codegen', () => {
      const { content } = compile(
        `<script setup>
        import { ref } from 'vue'
        const count = ref(0)
        const maybe = foo()
        let lett = 1
        </script>
        <template>
          <div @click="count++"/>
          <div @click="--count"/>
          <div @click="maybe++"/>
          <div @click="--maybe"/>
          <div @click="lett++"/>
          <div @click="--lett"/>
        </template>
        `,
        { inlineTemplate: true }
      )
      // known const ref: set value
      expect(content).toMatch(`count.value++`)
      expect(content).toMatch(`--count.value`)
      // const but maybe ref (non-ref case ignored)
      expect(content).toMatch(`maybe.value++`)
      expect(content).toMatch(`--maybe.value`)
      // let: handle both cases
      expect(content).toMatch(`_isRef(lett) ? lett.value++ : lett++`)
      expect(content).toMatch(`_isRef(lett) ? --lett.value : --lett`)
      assertCode(content)
    })

    test('template destructure assignment codegen', () => {
      const { content } = compile(
        `<script setup>
        import { ref } from 'vue'
        const val = {}
        const count = ref(0)
        const maybe = foo()
        let lett = 1
        </script>
        <template>
          <div @click="({ count } = val)"/>
          <div @click="[maybe] = val"/>
          <div @click="({ lett } = val)"/>
        </template>
        `,
        { inlineTemplate: true }
      )
      // known const ref: set value
      expect(content).toMatch(`({ count: count.value } = val)`)
      // const but maybe ref (non-ref case ignored)
      expect(content).toMatch(`[maybe.value] = val`)
      // let: assumes non-ref
      expect(content).toMatch(`{ lett: lett } = val`)
      assertCode(content)
    })

    test('ssr codegen', () => {
      const { content } = compile(
        `
        <script setup>
        import { ref } from 'vue'
        const count = ref(0)
        </script>
        <template>
          <div>{{ count }}</div>
          <div>static</div>
        </template>
        <style>
        div { color: v-bind(count) }
        </style>
        `,
        {
          inlineTemplate: true,
          templateOptions: {
            ssr: true
          }
        }
      )
      expect(content).toMatch(`\n  __ssrInlineRender: true,\n`)
      expect(content).toMatch(`return (_ctx, _push`)
      expect(content).toMatch(`ssrInterpolate`)
      expect(content).not.toMatch(`useCssVars`)
      expect(content).toMatch(`"--${mockId}-count": (count.value)`)
      assertCode(content)
    })
  })

  describe('with TypeScript', () => {
    test('hoist type declarations', () => {
      const { content } = compile(`
      <script setup lang="ts">
        export interface Foo {}
        type Bar = {}
      </script>`)
      assertCode(content)
    })

    test('defineProps/Emit w/ runtime options', () => {
      const { content } = compile(`
<script setup lang="ts">
const props = defineProps({ foo: String })
const emit = defineEmits(['a', 'b'])
</script>
      `)
      assertCode(content)
      expect(content).toMatch(`export default /*#__PURE__*/_defineComponent({
  props: { foo: String },
  emits: ['a', 'b'],
  setup(__props, { expose: __expose, emit }) {`)
    })

    test('defineProps w/ type', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
      interface Test {}

      type Alias = number[]

      defineProps<{
        string: string
        number: number
        boolean: boolean
        object: object
        objectLiteral: { a: number }
        fn: (n: number) => void
        functionRef: Function
        objectRef: Object
        dateTime: Date
        array: string[]
        arrayRef: Array<any>
        tuple: [number, number]
        set: Set<string>
        literal: 'foo'
        optional?: any
        recordRef: Record<string, null>
        interface: Test
        alias: Alias
        method(): void
        symbol: symbol
        extract: Extract<1 | 2 | boolean, 2>
        exclude: Exclude<1 | 2 | boolean, 2>
        uppercase: Uppercase<'foo'>
        params: Parameters<(foo: any) => void>
        nonNull: NonNullable<string | null>
        objectOrFn: {
          (): void
          foo: string
        }

        union: string | number
        literalUnion: 'foo' | 'bar'
        literalUnionNumber: 1 | 2 | 3 | 4 | 5
        literalUnionMixed: 'foo' | 1 | boolean
        intersection: Test & {}
        intersection2: 'foo' & ('foo' | 'bar')
        foo: ((item: any) => boolean) | null

        unknown: UnknownType
        unknownUnion: UnknownType | string
        unknownIntersection: UnknownType & Object
        unknownUnionWithBoolean: UnknownType | boolean
        unknownUnionWithFunction: UnknownType | (() => any)
      }>()
      </script>`)
      assertCode(content)
      expect(content).toMatch(`string: { type: String, required: true }`)
      expect(content).toMatch(`number: { type: Number, required: true }`)
      expect(content).toMatch(`boolean: { type: Boolean, required: true }`)
      expect(content).toMatch(`object: { type: Object, required: true }`)
      expect(content).toMatch(`objectLiteral: { type: Object, required: true }`)
      expect(content).toMatch(`fn: { type: Function, required: true }`)
      expect(content).toMatch(`functionRef: { type: Function, required: true }`)
      expect(content).toMatch(`objectRef: { type: Object, required: true }`)
      expect(content).toMatch(`dateTime: { type: Date, required: true }`)
      expect(content).toMatch(`array: { type: Array, required: true }`)
      expect(content).toMatch(`arrayRef: { type: Array, required: true }`)
      expect(content).toMatch(`tuple: { type: Array, required: true }`)
      expect(content).toMatch(`set: { type: Set, required: true }`)
      expect(content).toMatch(`literal: { type: String, required: true }`)
      expect(content).toMatch(`optional: { type: null, required: false }`)
      expect(content).toMatch(`recordRef: { type: Object, required: true }`)
      expect(content).toMatch(`interface: { type: Object, required: true }`)
      expect(content).toMatch(`alias: { type: Array, required: true }`)
      expect(content).toMatch(`method: { type: Function, required: true }`)
      expect(content).toMatch(`symbol: { type: Symbol, required: true }`)
      expect(content).toMatch(
        `objectOrFn: { type: [Function, Object], required: true },`
      )
      expect(content).toMatch(`extract: { type: Number, required: true }`)
      expect(content).toMatch(
        `exclude: { type: [Number, Boolean], required: true }`
      )
      expect(content).toMatch(`uppercase: { type: String, required: true }`)
      expect(content).toMatch(`params: { type: Array, required: true }`)
      expect(content).toMatch(`nonNull: { type: String, required: true }`)
      expect(content).toMatch(
        `union: { type: [String, Number], required: true }`
      )
      expect(content).toMatch(`literalUnion: { type: String, required: true }`)
      expect(content).toMatch(
        `literalUnionNumber: { type: Number, required: true }`
      )
      expect(content).toMatch(
        `literalUnionMixed: { type: [String, Number, Boolean], required: true }`
      )
      expect(content).toMatch(`intersection: { type: Object, required: true }`)
      expect(content).toMatch(`intersection2: { type: String, required: true }`)
      expect(content).toMatch(`foo: { type: [Function, null], required: true }`)
      expect(content).toMatch(`unknown: { type: null, required: true }`)
      // uninon containing unknown type: skip check
      expect(content).toMatch(`unknownUnion: { type: null, required: true }`)
      // intersection containing unknown type: narrow to the known types
      expect(content).toMatch(
        `unknownIntersection: { type: Object, required: true },`
      )
      expect(content).toMatch(
        `unknownUnionWithBoolean: { type: Boolean, required: true, skipCheck: true },`
      )
      expect(content).toMatch(
        `unknownUnionWithFunction: { type: Function, required: true, skipCheck: true }`
      )
      expect(bindings).toStrictEqual({
        string: BindingTypes.PROPS,
        number: BindingTypes.PROPS,
        boolean: BindingTypes.PROPS,
        object: BindingTypes.PROPS,
        objectLiteral: BindingTypes.PROPS,
        fn: BindingTypes.PROPS,
        functionRef: BindingTypes.PROPS,
        objectRef: BindingTypes.PROPS,
        dateTime: BindingTypes.PROPS,
        array: BindingTypes.PROPS,
        arrayRef: BindingTypes.PROPS,
        tuple: BindingTypes.PROPS,
        set: BindingTypes.PROPS,
        literal: BindingTypes.PROPS,
        optional: BindingTypes.PROPS,
        recordRef: BindingTypes.PROPS,
        interface: BindingTypes.PROPS,
        alias: BindingTypes.PROPS,
        method: BindingTypes.PROPS,
        symbol: BindingTypes.PROPS,
        objectOrFn: BindingTypes.PROPS,
        extract: BindingTypes.PROPS,
        exclude: BindingTypes.PROPS,
        union: BindingTypes.PROPS,
        literalUnion: BindingTypes.PROPS,
        literalUnionNumber: BindingTypes.PROPS,
        literalUnionMixed: BindingTypes.PROPS,
        intersection: BindingTypes.PROPS,
        intersection2: BindingTypes.PROPS,
        foo: BindingTypes.PROPS,
        uppercase: BindingTypes.PROPS,
        params: BindingTypes.PROPS,
        nonNull: BindingTypes.PROPS,
        unknown: BindingTypes.PROPS,
        unknownUnion: BindingTypes.PROPS,
        unknownIntersection: BindingTypes.PROPS,
        unknownUnionWithBoolean: BindingTypes.PROPS,
        unknownUnionWithFunction: BindingTypes.PROPS
      })
    })

    test('defineProps w/ interface', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
      interface Props { x?: number }
      defineProps<Props>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`x: { type: Number, required: false }`)
      expect(bindings).toStrictEqual({
        x: BindingTypes.PROPS
      })
    })

    test('defineProps w/ extends interface', () => {
      const { content, bindings } = compile(`
      <script lang="ts">
        interface Foo { x?: number }
      </script>
      <script setup lang="ts">
        interface Bar extends Foo { y?: number }
        interface Props extends Bar {
          z: number
          y: string
        }
        defineProps<Props>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`z: { type: Number, required: true }`)
      expect(content).toMatch(`y: { type: String, required: true }`)
      expect(content).toMatch(`x: { type: Number, required: false }`)
      expect(bindings).toStrictEqual({
        x: BindingTypes.PROPS,
        y: BindingTypes.PROPS,
        z: BindingTypes.PROPS
      })
    })

    test('defineProps w/ exported interface', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
      export interface Props { x?: number }
      defineProps<Props>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`x: { type: Number, required: false }`)
      expect(bindings).toStrictEqual({
        x: BindingTypes.PROPS
      })
    })

    test('defineProps w/ exported interface in normal script', () => {
      const { content, bindings } = compile(`
      <script lang="ts">
        export interface Props { x?: number }
      </script>
      <script setup lang="ts">
        defineProps<Props>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`x: { type: Number, required: false }`)
      expect(bindings).toStrictEqual({
        x: BindingTypes.PROPS
      })
    })

    test('defineProps w/ type alias', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
      type Props = { x?: number }
      defineProps<Props>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`x: { type: Number, required: false }`)
      expect(bindings).toStrictEqual({
        x: BindingTypes.PROPS
      })
    })

    test('defineProps w/ exported type alias', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
      export type Props = { x?: number }
      defineProps<Props>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`x: { type: Number, required: false }`)
      expect(bindings).toStrictEqual({
        x: BindingTypes.PROPS
      })
    })

    test('defineProps w/ TS assertion', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
        defineProps(['foo'])! as any
      </script>
    `)
      expect(content).toMatch(`props: ['foo']`)
      assertCode(content)
      expect(bindings).toStrictEqual({
        foo: BindingTypes.PROPS
      })
    })

    test('withDefaults (static)', () => {
      const { content, bindings } = compile(`
      <script setup lang="ts">
      const props = withDefaults(defineProps<{
        foo?: string
        bar?: number;
        baz: boolean;
        qux?(): number;
        quux?(): void
        quuxx?: Promise<string>;
        fred?: string
      }>(), {
        foo: 'hi',
        qux() { return 1 },
        ['quux']() { },
        async quuxx() { return await Promise.resolve('hi') },
        get fred() { return 'fred' }
      })
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(
        `foo: { type: String, required: false, default: 'hi' }`
      )
      expect(content).toMatch(`bar: { type: Number, required: false }`)
      expect(content).toMatch(`baz: { type: Boolean, required: true }`)
      expect(content).toMatch(
        `qux: { type: Function, required: false, default() { return 1 } }`
      )
      expect(content).toMatch(
        `quux: { type: Function, required: false, default() { } }`
      )
      expect(content).toMatch(
        `quuxx: { type: Promise, required: false, async default() { return await Promise.resolve('hi') } }`
      )
      expect(content).toMatch(
        `fred: { type: String, required: false, get default() { return 'fred' } }`
      )
      expect(content).toMatch(`const props = __props`)
      expect(bindings).toStrictEqual({
        foo: BindingTypes.PROPS,
        bar: BindingTypes.PROPS,
        baz: BindingTypes.PROPS,
        qux: BindingTypes.PROPS,
        quux: BindingTypes.PROPS,
        quuxx: BindingTypes.PROPS,
        fred: BindingTypes.PROPS,
        props: BindingTypes.SETUP_CONST
      })
    })

    test('withDefaults (static) + normal script', () => {
      const { content } = compile(`
      <script lang="ts">
        interface Props {
          a?: string;
        }
      </script>
      <script setup lang="ts">
        const props = withDefaults(defineProps<Props>(), {
          a: "a",
        });
      </script>
      `)
      assertCode(content)
    })

    // #7111
    test('withDefaults (static) w/ production mode', () => {
      const { content } = compile(
        `
      <script setup lang="ts">
      const props = withDefaults(defineProps<{
        foo: () => void
        bar: boolean
        baz: boolean | (() => void)
        qux: string | number
      }>(), {
        baz: true,
        qux: 'hi'
      })
      </script>
      `,
        { isProd: true }
      )
      assertCode(content)
      expect(content).toMatch(`const props = __props`)

      // foo has no default value, the Function can be dropped
      expect(content).toMatch(`foo: {}`)
      expect(content).toMatch(`bar: { type: Boolean }`)
      expect(content).toMatch(
        `baz: { type: [Boolean, Function], default: true }`
      )
      expect(content).toMatch(`qux: { default: 'hi' }`)
    })

    test('withDefaults (dynamic)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      import { defaults } from './foo'
      const props = withDefaults(defineProps<{
        foo?: string
        bar?: number
        baz: boolean
      }>(), { ...defaults })
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`import { mergeDefaults as _mergeDefaults`)
      expect(content).toMatch(
        `
  _mergeDefaults({
    foo: { type: String, required: false },
    bar: { type: Number, required: false },
    baz: { type: Boolean, required: true }
  }, { ...defaults })`.trim()
      )
    })

    test('withDefaults (reference)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      import { defaults } from './foo'
      const props = withDefaults(defineProps<{
        foo?: string
        bar?: number
        baz: boolean
      }>(), defaults)
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`import { mergeDefaults as _mergeDefaults`)
      expect(content).toMatch(
        `
  _mergeDefaults({
    foo: { type: String, required: false },
    bar: { type: Number, required: false },
    baz: { type: Boolean, required: true }
  }, defaults)`.trim()
      )
    })

    // #7111
    test('withDefaults (dynamic) w/ production mode', () => {
      const { content } = compile(
        `
      <script setup lang="ts">
      import { defaults } from './foo'
      const props = withDefaults(defineProps<{
        foo: () => void
        bar: boolean
        baz: boolean | (() => void)
        qux: string | number
      }>(), { ...defaults })
      </script>
      `,
        { isProd: true }
      )
      assertCode(content)
      expect(content).toMatch(`import { mergeDefaults as _mergeDefaults`)
      expect(content).toMatch(
        `
  _mergeDefaults({
    foo: { type: Function },
    bar: { type: Boolean },
    baz: { type: [Boolean, Function] },
    qux: {}
  }, { ...defaults })`.trim()
      )
    })

    test('withDefaults w/ dynamic object method', () => {
      const { content } = compile(`
      <script setup lang="ts">
      const props = withDefaults(defineProps<{
        foo?: () => 'string'
      }>(), {
        ['fo' + 'o']() { return 'foo' }
      })
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`import { mergeDefaults as _mergeDefaults`)
      expect(content).toMatch(
        `
  _mergeDefaults({
    foo: { type: Function, required: false }
  }, {
        ['fo' + 'o']() { return 'foo' }
      })`.trim()
      )
    })

    test('defineEmits w/ type', () => {
      const { content } = compile(`
      <script setup lang="ts">
      const emit = defineEmits<(e: 'foo' | 'bar') => void>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type (union)', () => {
      const type = `((e: 'foo' | 'bar') => void) | ((e: 'baz', id: number) => void)`
      expect(() =>
        compile(`
      <script setup lang="ts">
      const emit = defineEmits<${type}>()
      </script>
      `)
      ).toThrow()
    })

    test('defineEmits w/ type (type literal w/ call signatures)', () => {
      const type = `{(e: 'foo' | 'bar'): void; (e: 'baz', id: number): void;}`
      const { content } = compile(`
      <script setup lang="ts">
      const emit = defineEmits<${type}>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar", "baz"]`)
    })

    test('defineEmits w/ type (interface)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      interface Emits { (e: 'foo' | 'bar'): void }
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type (exported interface)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      export interface Emits { (e: 'foo' | 'bar'): void }
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type from normal script', () => {
      const { content } = compile(`
      <script lang="ts">
        export interface Emits { (e: 'foo' | 'bar'): void }
      </script>
      <script setup lang="ts">
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type (type alias)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      type Emits = { (e: 'foo' | 'bar'): void }
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type (exported type alias)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      export type Emits = { (e: 'foo' | 'bar'): void }
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type (referenced function type)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      type Emits = (e: 'foo' | 'bar') => void
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    test('defineEmits w/ type (referenced exported function type)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      export type Emits = (e: 'foo' | 'bar') => void
      const emit = defineEmits<Emits>()
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
    })

    // #5393
    test('defineEmits w/ type (interface ts type)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      interface Emits { (e: 'foo'): void }
      const emit: Emits = defineEmits(['foo'])
      </script>
      `)
      assertCode(content)
      expect(content).toMatch(`emits: ['foo']`)
    })

    test('defineEmits w/ type (property syntax)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      const emit = defineEmits<{ foo: [], bar: [] }>()
      </script>
      `)
      expect(content).toMatch(`emits: ["foo", "bar"]`)
      assertCode(content)
    })

    // #8040
    test('defineEmits w/ type (property syntax string literal)', () => {
      const { content } = compile(`
      <script setup lang="ts">
      const emit = defineEmits<{ 'foo:bar': [] }>()
      </script>
      `)
      expect(content).toMatch(`emits: ["foo:bar"]`)
      assertCode(content)
    })

    describe('defineSlots()', () => {
      test('basic usage', () => {
        const { content } = compile(`
          <script setup lang="ts">
          const slots = defineSlots<{
            default: { msg: string }
          }>()
          </script>
        `)
        assertCode(content)
        expect(content).toMatch(`const slots = _useSlots()`)
        expect(content).not.toMatch('defineSlots')
      })

      test('w/o return value', () => {
        const { content } = compile(`
          <script setup lang="ts">
          defineSlots<{
            default: { msg: string }
          }>()
          </script>
        `)
        assertCode(content)
        expect(content).not.toMatch('defineSlots')
        expect(content).not.toMatch(`_useSlots`)
      })

      test('w/o generic params', () => {
        const { content } = compile(`
          <script setup>
          const slots = defineSlots()
          </script>
        `)
        assertCode(content)
        expect(content).toMatch(`const slots = _useSlots()`)
        expect(content).not.toMatch('defineSlots')
      })
    })

    describe('defineModel()', () => {
      test('basic usage', () => {
        const { content, bindings } = compile(
          `
          <script setup lang="ts">
          const modelValue = defineModel<boolean | string>()
          const count = defineModel<number>('count')
          const disabled = defineModel<number>('disabled', { required: false })
          const any = defineModel<any | boolean>('any')
          </script>
          `,
          { defineModel: true }
        )
        assertCode(content)
        expect(content).toMatch('"modelValue": { type: [Boolean, String] }')
        expect(content).toMatch('"count": { type: Number }')
        expect(content).toMatch(
          '"disabled": { type: Number, ...{ required: false } }'
        )
        expect(content).toMatch('"any": { type: Boolean, skipCheck: true }')
        expect(content).toMatch(
          'emits: ["update:modelValue", "update:count", "update:disabled", "update:any"]'
        )

        expect(content).toMatch(
          `const modelValue = _useModel(__props, "modelValue")`
        )
        expect(content).toMatch(`const count = _useModel(__props, "count")`)
        expect(content).toMatch(
          `const disabled = _useModel(__props, "disabled")`
        )
        expect(content).toMatch(`const any = _useModel(__props, "any")`)

        expect(bindings).toStrictEqual({
          modelValue: BindingTypes.SETUP_REF,
          count: BindingTypes.SETUP_REF,
          disabled: BindingTypes.SETUP_REF,
          any: BindingTypes.SETUP_REF
        })
      })

      test('w/ production mode', () => {
        const { content, bindings } = compile(
          `
          <script setup lang="ts">
          const modelValue = defineModel<boolean>()
          const fn = defineModel<() => void>('fn')
          const fnWithDefault = defineModel<() => void>('fnWithDefault', { default: () => null })
          const str = defineModel<string>('str')
          const optional = defineModel<string>('optional', { required: false })
          </script>
          `,
          { defineModel: true, isProd: true }
        )
        assertCode(content)
        expect(content).toMatch('"modelValue": { type: Boolean }')
        expect(content).toMatch('"fn": {}')
        expect(content).toMatch(
          '"fnWithDefault": { type: Function, ...{ default: () => null } },'
        )
        expect(content).toMatch('"str": {}')
        expect(content).toMatch('"optional": { required: false }')
        expect(content).toMatch(
          'emits: ["update:modelValue", "update:fn", "update:fnWithDefault", "update:str", "update:optional"]'
        )
        expect(content).toMatch(
          `const modelValue = _useModel(__props, "modelValue")`
        )
        expect(content).toMatch(`const fn = _useModel(__props, "fn")`)
        expect(content).toMatch(`const str = _useModel(__props, "str")`)
        expect(bindings).toStrictEqual({
          modelValue: BindingTypes.SETUP_REF,
          fn: BindingTypes.SETUP_REF,
          fnWithDefault: BindingTypes.SETUP_REF,
          str: BindingTypes.SETUP_REF,
          optional: BindingTypes.SETUP_REF
        })
      })
    })

    test('runtime Enum', () => {
      const { content, bindings } = compile(
        `<script setup lang="ts">
        enum Foo { A = 123 }
        </script>`
      )
      assertCode(content)
      expect(bindings).toStrictEqual({
        Foo: BindingTypes.LITERAL_CONST
      })
    })

    test('runtime Enum in normal script', () => {
      const { content, bindings } = compile(
        `<script lang="ts">
          export enum D { D = "D" }
          const enum C { C = "C" }
          enum B { B = "B" }
        </script>
        <script setup lang="ts">
        enum Foo { A = 123 }
        </script>`
      )
      assertCode(content)
      expect(bindings).toStrictEqual({
        D: BindingTypes.LITERAL_CONST,
        C: BindingTypes.LITERAL_CONST,
        B: BindingTypes.LITERAL_CONST,
        Foo: BindingTypes.LITERAL_CONST
      })
    })

    test('const Enum', () => {
      const { content, bindings } = compile(
        `<script setup lang="ts">
        const enum Foo { A = 123 }
        </script>`,
        { hoistStatic: true }
      )
      assertCode(content)
      expect(bindings).toStrictEqual({
        Foo: BindingTypes.LITERAL_CONST
      })
    })

    test('runtime inference for Enum in defineProps', () => {
      expect(
        compile(
          `<script setup lang="ts">
        const enum Foo { A = 123 }
        defineProps<{
          foo: Foo
        }>()
        </script>`,
          { hoistStatic: true }
        ).content
      ).toMatch(`foo: { type: Number`)

      expect(
        compile(
          `<script setup lang="ts">
        const enum Foo { A = '123' }
        defineProps<{
          foo: Foo
        }>()
        </script>`,
          { hoistStatic: true }
        ).content
      ).toMatch(`foo: { type: String`)

      expect(
        compile(
          `<script setup lang="ts">
        const enum Foo { A = '123', B = 123 }
        defineProps<{
          foo: Foo
        }>()
        </script>`,
          { hoistStatic: true }
        ).content
      ).toMatch(`foo: { type: [String, Number]`)

      expect(
        compile(
          `<script setup lang="ts">
        const enum Foo { A, B }
        defineProps<{
          foo: Foo
        }>()
        </script>`,
          { hoistStatic: true }
        ).content
      ).toMatch(`foo: { type: Number`)
    })

    test('import type', () => {
      const { content } = compile(
        `<script setup lang="ts">
        import type { Foo } from './main.ts'
        import { type Bar, Baz } from './main.ts'
        </script>`
      )
      expect(content).toMatch(`return { get Baz() { return Baz } }`)
      assertCode(content)
    })
  })

  describe('async/await detection', () => {
    function assertAwaitDetection(code: string, shouldAsync = true) {
      const { content } = compile(`<script setup>${code}</script>`, {
        reactivityTransform: true
      })
      if (shouldAsync) {
        expect(content).toMatch(`let __temp, __restore`)
      }
      expect(content).toMatch(`${shouldAsync ? `async ` : ``}setup(`)
      assertCode(content)
      return content
    }

    test('expression statement', () => {
      assertAwaitDetection(`await foo`)
    })

    test('variable', () => {
      assertAwaitDetection(`const a = 1 + (await foo)`)
    })

    test('ref', () => {
      assertAwaitDetection(`let a = $ref(1 + (await foo))`)
    })

    // #4448
    test('nested await', () => {
      assertAwaitDetection(`await (await foo)`)
      assertAwaitDetection(`await ((await foo))`)
      assertAwaitDetection(`await (await (await foo))`)
    })

    // should prepend semicolon
    test('nested leading await in expression statement', () => {
      const code = assertAwaitDetection(`foo()\nawait 1 + await 2`)
      expect(code).toMatch(`foo()\n;(`)
    })

    // #4596 should NOT prepend semicolon
    test('single line conditions', () => {
      const code = assertAwaitDetection(`if (false) await foo()`)
      expect(code).not.toMatch(`if (false) ;(`)
    })

    test('nested statements', () => {
      assertAwaitDetection(`if (ok) { await foo } else { await bar }`)
    })

    test('multiple `if` nested statements', () => {
      assertAwaitDetection(`if (ok) {
        let a = 'foo'
        await 0 + await 1
        await 2
      } else if (a) {
        await 10
        if (b) {
          await 0 + await 1
        } else {
          let a = 'foo'
          await 2
        }
        if (b) {
          await 3
          await 4
        }
      } else {
        await 5
      }`)
    })

    test('multiple `if while` nested statements', () => {
      assertAwaitDetection(`if (ok) {
        while (d) {
          await 5
        }
        while (d) {
          await 5
          await 6
          if (c) {
            let f = 10
            10 + await 7
          } else {
            await 8
            await 9
          }
        }
      }`)
    })

    test('multiple `if for` nested statements', () => {
      assertAwaitDetection(`if (ok) {
        for (let a of [1,2,3]) {
          await a
        }
        for (let a of [1,2,3]) {
          await a
          await a
        }
      }`)
    })

    test('should ignore await inside functions', () => {
      // function declaration
      assertAwaitDetection(`async function foo() { await bar }`, false)
      // function expression
      assertAwaitDetection(`const foo = async () => { await bar }`, false)
      // object method
      assertAwaitDetection(`const obj = { async method() { await bar }}`, false)
      // class method
      assertAwaitDetection(
        `const cls = class Foo { async method() { await bar }}`,
        false
      )
    })
  })

  describe('errors', () => {
    test('<script> and <script setup> must have same lang', () => {
      expect(() =>
        compile(`<script>foo()</script><script setup lang="ts">bar()</script>`)
      ).toThrow(`<script> and <script setup> must have the same language type`)
    })

    const moduleErrorMsg = `cannot contain ES module exports`

    test('non-type named exports', () => {
      expect(() =>
        compile(`<script setup>
        export const a = 1
        </script>`)
      ).toThrow(moduleErrorMsg)

      expect(() =>
        compile(`<script setup>
        export * from './foo'
        </script>`)
      ).toThrow(moduleErrorMsg)

      expect(() =>
        compile(`<script setup>
          const bar = 1
          export { bar as default }
        </script>`)
      ).toThrow(moduleErrorMsg)
    })

    test('defineProps/Emit() w/ both type and non-type args', () => {
      expect(() => {
        compile(`<script setup lang="ts">
        defineProps<{}>({})
        </script>`)
      }).toThrow(`cannot accept both type and non-type arguments`)

      expect(() => {
        compile(`<script setup lang="ts">
        defineEmits<{}>({})
        </script>`)
      }).toThrow(`cannot accept both type and non-type arguments`)
    })

    test('defineProps/Emit() referencing local var', () => {
      expect(() =>
        compile(`<script setup>
        let bar = 1
        defineProps({
          foo: {
            default: () => bar
          }
        })
        </script>`)
      ).toThrow(`cannot reference locally declared variables`)

      expect(() =>
        compile(`<script setup>
        let bar = 'hello'
        defineEmits([bar])
        </script>`)
      ).toThrow(`cannot reference locally declared variables`)

      // #4644
      expect(() =>
        compile(`
        <script>const bar = 1</script>
        <script setup>
        defineProps({
          foo: {
            default: () => bar
          }
        })
        </script>`)
      ).not.toThrow(`cannot reference locally declared variables`)
    })

    test('should allow defineProps/Emit() referencing scope var', () => {
      assertCode(
        compile(`<script setup>
          const bar = 1
          defineProps({
            foo: {
              default: bar => bar + 1
            }
          })
          defineEmits({
            foo: bar => bar > 1
          })
        </script>`).content
      )
    })

    test('should allow defineProps/Emit() referencing imported binding', () => {
      assertCode(
        compile(`<script setup>
        import { bar } from './bar'
        defineProps({
          foo: {
            default: () => bar
          }
        })
        defineEmits({
          foo: () => bar > 1
        })
        </script>`).content
      )
    })

    test('mixed usage of property / call signature in defineEmits', () => {
      expect(() =>
        compile(`<script setup lang="ts">
        defineEmits<{
          foo: []
          (e: 'hi'): void
        }>()
        </script>`)
      ).toThrow(
        `defineEmits() type cannot mixed call signature and property syntax.`
      )
    })
  })
})

describe('SFC analyze <script> bindings', () => {
  it('can parse decorators syntax in typescript block', () => {
    const { scriptAst } = compile(`
      <script lang="ts">
        import { Options, Vue } from 'vue-class-component';
        @Options({
          components: {
            HelloWorld,
          },
          props: ['foo', 'bar']
        })
        export default class Home extends Vue {}
      </script>
    `)

    expect(scriptAst).toBeDefined()
  })

  it('recognizes props array declaration', () => {
    const { bindings } = compile(`
      <script>
        export default {
          props: ['foo', 'bar']
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.PROPS,
      bar: BindingTypes.PROPS
    })
    expect(bindings!.__isScriptSetup).toBe(false)
  })

  it('recognizes props object declaration', () => {
    const { bindings } = compile(`
      <script>
        export default {
          props: {
            foo: String,
            bar: {
              type: String,
            },
            baz: null,
            qux: [String, Number]
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.PROPS,
      bar: BindingTypes.PROPS,
      baz: BindingTypes.PROPS,
      qux: BindingTypes.PROPS
    })
    expect(bindings!.__isScriptSetup).toBe(false)
  })

  it('recognizes setup return', () => {
    const { bindings } = compile(`
      <script>
        const bar = 2
        export default {
          setup() {
            return {
              foo: 1,
              bar
            }
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.SETUP_MAYBE_REF,
      bar: BindingTypes.SETUP_MAYBE_REF
    })
    expect(bindings!.__isScriptSetup).toBe(false)
  })

  it('recognizes exported vars', () => {
    const { bindings } = compile(`
      <script>
        export const foo = 2
      </script>
      <script setup>
        console.log(foo)
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.LITERAL_CONST
    })
  })

  it('recognizes async setup return', () => {
    const { bindings } = compile(`
      <script>
        const bar = 2
        export default {
          async setup() {
            return {
              foo: 1,
              bar
            }
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.SETUP_MAYBE_REF,
      bar: BindingTypes.SETUP_MAYBE_REF
    })
    expect(bindings!.__isScriptSetup).toBe(false)
  })

  it('recognizes data return', () => {
    const { bindings } = compile(`
      <script>
        const bar = 2
        export default {
          data() {
            return {
              foo: null,
              bar
            }
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.DATA,
      bar: BindingTypes.DATA
    })
  })

  it('recognizes methods', () => {
    const { bindings } = compile(`
      <script>
        export default {
          methods: {
            foo() {}
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({ foo: BindingTypes.OPTIONS })
  })

  it('recognizes computeds', () => {
    const { bindings } = compile(`
      <script>
        export default {
          computed: {
            foo() {},
            bar: {
              get() {},
              set() {},
            }
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.OPTIONS,
      bar: BindingTypes.OPTIONS
    })
  })

  it('recognizes injections array declaration', () => {
    const { bindings } = compile(`
      <script>
        export default {
          inject: ['foo', 'bar']
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.OPTIONS,
      bar: BindingTypes.OPTIONS
    })
  })

  it('recognizes injections object declaration', () => {
    const { bindings } = compile(`
      <script>
        export default {
          inject: {
            foo: {},
            bar: {},
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.OPTIONS,
      bar: BindingTypes.OPTIONS
    })
  })

  it('works for mixed bindings', () => {
    const { bindings } = compile(`
      <script>
        export default {
          inject: ['foo'],
          props: {
            bar: String,
          },
          setup() {
            return {
              baz: null,
            }
          },
          data() {
            return {
              qux: null
            }
          },
          methods: {
            quux() {}
          },
          computed: {
            quuz() {}
          }
        }
      </script>
    `)
    expect(bindings).toStrictEqual({
      foo: BindingTypes.OPTIONS,
      bar: BindingTypes.PROPS,
      baz: BindingTypes.SETUP_MAYBE_REF,
      qux: BindingTypes.DATA,
      quux: BindingTypes.OPTIONS,
      quuz: BindingTypes.OPTIONS
    })
  })

  it('works for script setup', () => {
    const { bindings } = compile(`
      <script setup>
      import { ref as r } from 'vue'
      defineProps({
        foo: String
      })

      const a = r(1)
      let b = 2
      const c = 3
      const { d } = someFoo()
      let { e } = someBar()
      </script>
    `)

    expect(bindings).toStrictEqual({
      r: BindingTypes.SETUP_CONST,
      a: BindingTypes.SETUP_REF,
      b: BindingTypes.SETUP_LET,
      c: BindingTypes.LITERAL_CONST,
      d: BindingTypes.SETUP_MAYBE_REF,
      e: BindingTypes.SETUP_LET,
      foo: BindingTypes.PROPS
    })
  })

  describe('auto name inference', () => {
    test('basic', () => {
      const { content } = compile(
        `<script setup>const a = 1</script>
        <template>{{ a }}</template>`,
        undefined,
        {
          filename: 'FooBar.vue'
        }
      )
      expect(content).toMatch(`export default {
  __name: 'FooBar'`)
      assertCode(content)
    })

    test('do not overwrite manual name (object)', () => {
      const { content } = compile(
        `<script>
        export default {
          name: 'Baz'
        }
        </script>
        <script setup>const a = 1</script>
        <template>{{ a }}</template>`,
        undefined,
        {
          filename: 'FooBar.vue'
        }
      )
      expect(content).not.toMatch(`name: 'FooBar'`)
      expect(content).toMatch(`name: 'Baz'`)
      assertCode(content)
    })

    test('do not overwrite manual name (call)', () => {
      const { content } = compile(
        `<script>
        import { defineComponent } from 'vue'
        export default defineComponent({
          name: 'Baz'
        })
        </script>
        <script setup>const a = 1</script>
        <template>{{ a }}</template>`,
        undefined,
        {
          filename: 'FooBar.vue'
        }
      )
      expect(content).not.toMatch(`name: 'FooBar'`)
      expect(content).toMatch(`name: 'Baz'`)
      assertCode(content)
    })
  })
})

describe('SFC genDefaultAs', () => {
  test('normal <script> only', () => {
    const { content } = compile(
      `<script>
      export default {}
      </script>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).toMatch(`const _sfc_ = {}`)
    assertCode(content)
  })

  test('normal <script> w/ cssVars', () => {
    const { content } = compile(
      `<script>
      export default {}
      </script>
      <style>
      .foo { color: v-bind(x) }
      </style>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).not.toMatch('__default__')
    expect(content).toMatch(`const _sfc_ = {}`)
    assertCode(content)
  })

  test('<script> + <script setup>', () => {
    const { content } = compile(
      `<script>
      export default {}
      </script>
      <script setup>
      const a = 1
      </script>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).toMatch(
      `const _sfc_ = /*#__PURE__*/Object.assign(__default__`
    )
    assertCode(content)
  })

  test('<script> + <script setup>', () => {
    const { content } = compile(
      `<script>
      export default {}
      </script>
      <script setup>
      const a = 1
      </script>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).toMatch(
      `const _sfc_ = /*#__PURE__*/Object.assign(__default__`
    )
    assertCode(content)
  })

  test('<script setup> only', () => {
    const { content } = compile(
      `<script setup>
      const a = 1
      </script>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).toMatch(`const _sfc_ = {\n  setup`)
    assertCode(content)
  })

  test('<script setup> only w/ ts', () => {
    const { content } = compile(
      `<script setup lang="ts">
      const a = 1
      </script>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).toMatch(`const _sfc_ = /*#__PURE__*/_defineComponent(`)
    assertCode(content)
  })

  test('<script> + <script setup> w/ ts', () => {
    const { content } = compile(
      `<script lang="ts">
      export default {}
      </script>
      <script setup lang="ts">
      const a = 1
      </script>`,
      {
        genDefaultAs: '_sfc_'
      }
    )
    expect(content).not.toMatch('export default')
    expect(content).toMatch(
      `const _sfc_ = /*#__PURE__*/_defineComponent({\n  ...__default__`
    )
    assertCode(content)
  })
})