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)
  })

  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)
    })

    // #7805
    test('keep original semi style', () => {
      const { content } = compile(`
        <script setup>
        console.log('test')
        const props = defineProps(['item']);
        const emit = defineEmits(['change']);
        (function () {})()
        </script>
      `)
      assertCode(content)

      expect(content).toMatch(`console.log('test')`)
      expect(content).toMatch(`const props = __props;`)
      expect(content).toMatch(`const emit = __emit;`)
      expect(content).toMatch(`(function () {})()`)
    })

    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)
    })

    test('dynamic arguments', () => {
      const { content } = compile(`
        <script setup lang="ts">
        import { FooBar, foo, bar, unused, baz } from './x'
        </script>
        <template>
          <FooBar #[foo.slotName] />
          <FooBar #unused />
          <div :[bar.attrName]="15"></div>
          <div unused="unused"></div>
          <div #[\`item:\${baz.key}\`]="{ value }"></div>
        </template>
        `)
      expect(content).toMatch(
        `return { get FooBar() { return FooBar }, get foo() { return foo }, ` +
          `get bar() { return bar }, get baz() { return baz } }`
      )
      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>
      `)
    })

    test('template ref', () => {
      const { content } = compile(`
        <script setup lang="ts">
          import { foo, bar, Baz } from './foo'
        </script>
        <template>
          <div ref="foo"></div>
          <div ref=""></div>
          <Baz ref="bar" />
        </template>
        `)
      expect(content).toMatch(
        'return { get foo() { return foo }, get bar() { return bar }, get Baz() { return Baz } }'
      )
      assertCode(content)
    })
  })

  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)
    })

    test('the v-for wrapped in parentheses can be correctly parsed & inline is false', () => {
      expect(() =>
        compile(
          `
        <script setup lang="ts">
        import { ref } from 'vue'
        const stacks = ref([])
        </script>
        <template>
            <div v-for="({ file: efile }) of stacks"></div>
        </template>
        `,
          {
            inlineTemplate: false
          }
        )
      ).not.toThrowError()
    })
  })

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

    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('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() 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
      )
    })
  })
})

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)
  })

  test('binding type for edge cases', () => {
    const { bindings } = compile(
      `<script setup lang="ts">
      import { toRef } from 'vue'
      const props = defineProps<{foo: string}>()
      const foo = toRef(() => props.foo)
      </script>`
    )
    expect(bindings).toStrictEqual({
      toRef: BindingTypes.SETUP_CONST,
      props: BindingTypes.SETUP_REACTIVE_CONST,
      foo: BindingTypes.SETUP_REF
    })
  })
})