javascript - 没有正文无法转换节点

Question

我正在尝试运行 the example在 react-testing-library 中测试 react Hook 。但它似乎在这条线上失败了:

testHook(() => ({count, increment} = useCounter({ initialCount: 2 })))

看起来和Babel有关。尝试谷歌搜索但找不到任何似乎有同样问题的人。我用 create-react-app 安装了 webpack。

这是堆栈跟踪:

 ● Test suite failed to run

  Can't convert node without a body

  at NodePath.ensureBlock (node_modules/@babel/traverse/lib/path/conversion.js:64:11)
  at Scope.push (node_modules/@babel/traverse/lib/scope/index.js:727:12)
  at Object.toSequenceExpression (node_modules/@babel/types/lib/converters/toSequenceExpression.js:19:11)
  at NodePath.replaceExpressionWithStatements (node_modules/@babel/traverse/lib/path/replacement.js:203:36)
  at NodePath.insertAfter (node_modules/@babel/traverse/lib/path/modification.js:128:17)
  at NodePath.replaceWithMultiple (node_modules/@babel/traverse/lib/path/replacement.js:85:22)
  at PluginPass.AssignmentExpression (node_modules/babel-preset-react-app/node_modules/@babel/plugin-transform-destructuring/lib/index.js:433:14)
  at newFn (node_modules/@babel/traverse/lib/visitors.js:193:21)
  at NodePath._call (node_modules/@babel/traverse/lib/path/context.js:53:20)
  at NodePath.call (node_modules/@babel/traverse/lib/path/context.js:40:17)

Answer 1

我不确定如何解决 Babel 问题，但如果你写:

testHook(() => { return ({count, increment} = useCounter({ initialCount: 2 }))})

代替:

testHook(() => ({count, increment} = useCounter({ initialCount: 2 })))

它有效。可能他们正在使用一些您当前设置没有的高级 ES6 语法糖。希望对您有所帮助!