vue3-yuanma/packages/compiler-dom/__tests__/transforms/vCloak.spec.ts
2019-10-09 10:41:31 -04:00

33 lines
1003 B
TypeScript

import {
parse,
transform,
CompilerOptions,
ElementNode
} from '@vue/compiler-core'
import { transformCloak } from '../../src/transforms/vCloak'
import { transformElement } from '../../../compiler-core/src/transforms/transformElement'
import { CallExpression } from '../../src'
function transformWithCloak(template: string, options: CompilerOptions = {}) {
const ast = parse(template)
transform(ast, {
nodeTransforms: [transformElement],
directiveTransforms: {
cloak: transformCloak
},
...options
})
return ast.children[0] as ElementNode
}
describe('compiler: `v-cloak` transform', () => {
test('should add no props to DOM', () => {
const node = transformWithCloak(`<div v-cloak/>`)
const codegenArgs = (node.codegenNode as CallExpression).arguments
// As v-cloak adds no properties the codegen should be identical to
// rendering a div with no props or reactive data (so just the tag as the arg)
expect(codegenArgs.length).toBe(1)
})
})