feat(compiler-sfc): compileScript parseOnly mode

This is an internal feature meant for IDE support

packages/compiler-sfc/__tests__/compileScriptParseOnlyMode.spec.ts

@@ -0,0 +1,77 @@
+import { TextRange } from '../src/parse'
+import { compileSFCScript } from './utils'
+
+describe('compileScript parseOnly mode', () => {
+  function compile(src: string) {
+    return compileSFCScript(src, { parseOnly: true })
+  }
+
+  function getRange(src: string, range: TextRange) {
+    return src.slice(range.start, range.end)
+  }
+
+  test('bindings', () => {
+    const scriptSrc = `
+    import { foo } from './x'
+    `
+    const scriptSetupSrc = `
+    import { bar } from './x'
+
+    const a = 123
+    function b() {}
+    class c {}
+    `
+    const src = `
+    <script>${scriptSrc}</script>
+    <script setup>${scriptSetupSrc}</script>
+    `
+    const { ranges } = compile(src)
+
+    expect(getRange(scriptSrc, ranges!.scriptBindings[0])).toBe('foo')
+    expect(
+      ranges!.scriptSetupBindings.map(r => getRange(scriptSetupSrc, r))
+    ).toMatchObject(['bar', 'a', 'b', 'c'])
+  })
+
+  test('defineProps', () => {
+    const src = `
+    defineProps({ foo: String })
+    `
+    const { ranges } = compile(`<script setup>${src}</script>`)
+    expect(getRange(src, ranges!.propsRuntimeArg!)).toBe(`{ foo: String }`)
+  })
+
+  test('defineProps (type)', () => {
+    const src = `
+    interface Props { x?: number }
+    defineProps<Props>()
+    `
+    const { ranges } = compile(`<script setup lang="ts">${src}</script>`)
+    expect(getRange(src, ranges!.propsTypeArg!)).toBe(`Props`)
+  })
+
+  test('withDefaults', () => {
+    const src = `
+    interface Props { x?: number }
+    withDefaults(defineProps<Props>(), { x: 1 })
+    `
+    const { ranges } = compile(`<script setup lang="ts">${src}</script>`)
+    expect(getRange(src, ranges!.withDefaultsArg!)).toBe(`{ x: 1 }`)
+  })
+
+  test('defineEmits', () => {
+    const src = `
+    defineEmits(['foo'])
+    `
+    const { ranges } = compile(`<script setup>${src}</script>`)
+    expect(getRange(src, ranges!.emitsRuntimeArg!)).toBe(`['foo']`)
+  })
+
+  test('defineEmits (type)', () => {
+    const src = `
+    defineEmits<{ (e: 'x'): void }>()
+    `
+    const { ranges } = compile(`<script setup lang="ts">${src}</script>`)
+    expect(getRange(src, ranges!.emitsTypeArg!)).toBe(`{ (e: 'x'): void }`)
+  })
+})