vue3-yuanma/packages/compiler-dom/__tests__/transforms/vOn.spec.ts

import {
  baseParse as parse,
  transform,
  CompilerOptions,
  ElementNode,
  ObjectExpression,
  NodeTypes,
  VNodeCall
} from '@vue/compiler-core'
import { transformOn } from '../../src/transforms/vOn'
import { V_ON_WITH_MODIFIERS, V_ON_WITH_KEYS } from '../../src/runtimeHelpers'
import { transformElement } from '../../../compiler-core/src/transforms/transformElement'
import { transformExpression } from '../../../compiler-core/src/transforms/transformExpression'
import {
  createObjectMatcher,
  genFlagText
} from '../../../compiler-core/__tests__/testUtils'
import { PatchFlags } from '@vue/shared'

function parseWithVOn(template: string, options: CompilerOptions = {}) {
  const ast = parse(template)
  transform(ast, {
    nodeTransforms: [transformExpression, transformElement],
    directiveTransforms: {
      on: transformOn
    },
    ...options
  })
  return {
    root: ast,
    props: (((ast.children[0] as ElementNode).codegenNode as VNodeCall)
      .props as ObjectExpression).properties
  }
}

describe('compiler-dom: transform v-on', () => {
  it('should support multiple modifiers w/ prefixIdentifiers: true', () => {
    const {
      props: [prop]
    } = parseWithVOn(`<div @click.stop.prevent="test"/>`, {
      prefixIdentifiers: true
    })
    expect(prop).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: {
        callee: V_ON_WITH_MODIFIERS,
        arguments: [{ content: '_ctx.test' }, '["stop","prevent"]']
      }
    })
  })

  it('should support multiple events and modifiers options w/ prefixIdentifiers: true', () => {
    const { props } = parseWithVOn(
      `<div @click.stop="test" @keyup.enter="test" />`,
      {
        prefixIdentifiers: true
      }
    )
    const [clickProp, keyUpProp] = props

    expect(props).toHaveLength(2)
    expect(clickProp).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: {
        callee: V_ON_WITH_MODIFIERS,
        arguments: [{ content: '_ctx.test' }, '["stop"]']
      }
    })
    expect(keyUpProp).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: {
        callee: V_ON_WITH_KEYS,
        arguments: [{ content: '_ctx.test' }, '["enter"]']
      }
    })
  })

  it('should support multiple modifiers and event options w/ prefixIdentifiers: true', () => {
    const {
      props: [prop]
    } = parseWithVOn(`<div @click.stop.capture.passive="test"/>`, {
      prefixIdentifiers: true
    })
    expect(prop).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: createObjectMatcher({
        handler: {
          callee: V_ON_WITH_MODIFIERS,
          arguments: [{ content: '_ctx.test' }, '["stop"]']
        },
        options: createObjectMatcher({
          capture: { content: 'true', isStatic: false },
          passive: { content: 'true', isStatic: false }
        })
      })
    })
  })

  it('should wrap keys guard for keyboard events or dynamic events', () => {
    const {
      props: [prop]
    } = parseWithVOn(`<div @keyDown.stop.capture.ctrl.a="test"/>`, {
      prefixIdentifiers: true
    })
    expect(prop).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: createObjectMatcher({
        handler: {
          callee: V_ON_WITH_KEYS,
          arguments: [
            {
              callee: V_ON_WITH_MODIFIERS,
              arguments: [{ content: '_ctx.test' }, '["stop","ctrl"]']
            },
            '["a"]'
          ]
        },
        options: createObjectMatcher({
          capture: { content: 'true', isStatic: false }
        })
      })
    })
  })

  it('should not wrap keys guard if no key modifier is present', () => {
    const {
      props: [prop]
    } = parseWithVOn(`<div @keyup.exact="test"/>`, {
      prefixIdentifiers: true
    })
    expect(prop).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: {
        callee: V_ON_WITH_MODIFIERS,
        arguments: [{ content: '_ctx.test' }, '["exact"]']
      }
    })
  })

  it('should not wrap normal guard if there is only keys guard', () => {
    const {
      props: [prop]
    } = parseWithVOn(`<div @keyup.enter="test"/>`, {
      prefixIdentifiers: true
    })
    expect(prop).toMatchObject({
      type: NodeTypes.JS_PROPERTY,
      value: {
        callee: V_ON_WITH_KEYS,
        arguments: [{ content: '_ctx.test' }, '["enter"]']
      }
    })
  })

  test('cache handler w/ modifiers', () => {
    const {
      root,
      props: [prop]
    } = parseWithVOn(`<div @keyup.enter.capture="foo" />`, {
      prefixIdentifiers: true,
      cacheHandlers: true
    })
    expect(root.cached).toBe(1)
    // should not treat cached handler as dynamicProp, so it should have no
    // dynamicProps flags and only the hydration flag
    expect((root as any).children[0].codegenNode.patchFlag).toBe(
      genFlagText(PatchFlags.HYDRATE_EVENTS)
    )
    expect(prop.value).toMatchObject({
      type: NodeTypes.JS_CACHE_EXPRESSION,
      index: 1,
      value: {
        type: NodeTypes.JS_OBJECT_EXPRESSION,
        properties: [
          {
            key: { content: 'handler' },
            value: {
              type: NodeTypes.JS_CALL_EXPRESSION,
              callee: V_ON_WITH_KEYS
            }
          },
          {
            key: { content: 'options' },
            value: { type: NodeTypes.JS_OBJECT_EXPRESSION }
          }
        ]
      }
    })
  })
})