{"id":38107,"date":"2023-07-04T08:46:19","date_gmt":"2023-06-26T02:49:42","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%a9%a6%e8%91%97%e4%bd%bf%e7%94%a8%e8%87%aa%e5%ae%9a%e7%be%a9%e9%89%a4%e5%ad%90%e9%80%b2%e8%a1%8c%e6%b8%ac%e8%a9%a6\/"},"modified":"2024-04-30T11:54:44","modified_gmt":"2024-04-30T03:54:44","slug":"%e8%a9%a6%e8%91%97%e4%bd%bf%e7%94%a8%e8%87%aa%e5%ae%9a%e7%be%a9%e9%89%a4%e5%ad%90%e9%80%b2%e8%a1%8c%e6%b8%ac%e8%a9%a6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%a9%a6%e8%91%97%e4%bd%bf%e7%94%a8%e8%87%aa%e5%ae%9a%e7%be%a9%e9%89%a4%e5%ad%90%e9%80%b2%e8%a1%8c%e6%b8%ac%e8%a9%a6\/","title":{"rendered":"\u8a66\u8457\u4f7f\u7528\u81ea\u5b9a\u7fa9\u9264\u5b50\u9032\u884c\u6e2c\u8a66"},"content":{"rendered":"

\u9996\u5148<\/h2>\n

\u5f53\u4f7f\u7528\u81ea\u5b9a\u4e49 Hook \u5728\u6d4b\u8bd5 React \u65f6\uff0c\u6211\u89c9\u5f97\u53ef\u4ee5\u5c06\u903b\u8f91\u90e8\u5206\u5206\u79bb\u51fa\u6765\uff0c\u8fd9\u6837\u66f4\u5bb9\u6613\u8fdb\u884c\u5c0f\u89c4\u6a21\u6d4b\u8bd5\uff0c\u8fd9\u4ef6\u4e8b\u770b\u8d77\u6765\u975e\u5e38\u9ebb\u70e6\u3002\u6240\u4ee5\u6211\u51b3\u5b9a\u5c1d\u8bd5\u4e00\u4e0b\u3002<\/p>\n

\u672c\u6b21\u5c06\u4f7f\u7528\u6700\u5e38\u89c1\u7684\u8ba1\u6570\u5668\u6f14\u793a\u548c\u5b9e\u9645\u5f00\u53d1\u4e2d\u7ecf\u5e38\u4f7f\u7528\u7684\u8f93\u5165\u793a\u4f8b\u8fdb\u884c\u8bb2\u89e3\u3002<\/p>\n

\u6211\u5c06\u4f7f\u7528testing-library\/react\u548ctesting-library\/react-hooks\u6765\u7f16\u5199\u6d4b\u8bd5\u3002<\/p>\n

GitHub \u2192 GitHub \u4ed3\u5e93<\/h4>\n

 <\/p>\n

\u8fd9\u662f\u6700\u7ec8\u6210\u679c\u7269\u4ed3\u5e93\u3002<\/p>\n

\u67dc\u53f0\u7684\u4f8b\u5b50<\/h3>\n

\u73b0\u5728\u9a6c\u4e0a\u5f00\u59cb\u7f16\u5199\u8ba1\u6570\u5668\u7684\u6f14\u793a\u3002
\n\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u5f53\u6309\u4e0b\u6309\u94ae\u65f6\uff0c\u72b6\u6001\u7684\u503c\u589e\u52a0 1\u3002<\/p>\n

\u5982\u679c\u5728React\u7ec4\u4ef6\u4e2d\u76f4\u63a5\u5199\u5165\u7684\u60c5\u51b5\u4e0b\u3002<\/h4>\n
export<\/span> const<\/span> Counter<\/span>:<\/span> React<\/span>.<\/span>FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> {<\/span> count<\/span>,<\/span> setCount<\/span> }<\/span> =<\/span> useState<\/span>(<\/span>0<\/span>);<\/span>\r\n\r\n  const<\/span> handleIncrement<\/span> =<\/span> useCallback<\/span>(()<\/span> =><\/span> {<\/span>\r\n    setCount<\/span>((<\/span>prevCount<\/span>)<\/span> =><\/span> prevCount<\/span> +<\/span> 1<\/span>);<\/span>\r\n  },[]);<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>p<\/span>><\/span>count<\/span>:<\/span> {<\/span>count<\/span>}<\/span><<\/span>\/p<\/span>>\r\n<\/span>      <<\/span>button<\/span> onClick<\/span>=<\/span>{<\/span>handleIncrement<\/span>}<\/span>><\/span>add<\/span><<\/span>\/button<\/span>>\r\n<\/span>    <<\/span>\/div<\/span>>\r\n<\/span>  );<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u5c06Custom Hook\u5206\u79bb\u51fa\u6765<\/h4>\n
type<\/span> ReturnType<\/span> =<\/span> {<\/span>\r\n  count<\/span>:<\/span> number<\/span>;<\/span>\r\n  handleIncrement<\/span>:<\/span> ()<\/span> =><\/span> void<\/span>;<\/span>\r\n};<\/span>\r\n\r\nexport<\/span> const<\/span> useCounter<\/span> =<\/span> ():<\/span> ReturnType<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>count<\/span>,<\/span> setCount<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>0<\/span>);<\/span>\r\n  const<\/span> handleIncrement<\/span> =<\/span> useCallback<\/span>(()<\/span> =><\/span> {<\/span>\r\n    setCount<\/span>((<\/span>prevCount<\/span>)<\/span> =><\/span> prevCount<\/span> +<\/span> 1<\/span>);<\/span>\r\n  },<\/span> []);<\/span>\r\n\r\n  return<\/span> {<\/span>\r\n    count<\/span>,<\/span>\r\n    handleIncrement<\/span>,<\/span>\r\n  };<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
export<\/span> const<\/span> Counter<\/span>:<\/span> React<\/span>.<\/span>FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> {<\/span> count<\/span>,<\/span> handleIncrement<\/span> }<\/span> =<\/span> useCounter<\/span>();<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>p<\/span>><\/span>count<\/span>:<\/span> {<\/span>count<\/span>}<\/span><<\/span>\/p<\/span>>\r\n<\/span>      <<\/span>button<\/span> onClick<\/span>=<\/span>{<\/span>handleIncrement<\/span>}<\/span>><\/span>add<\/span><<\/span>\/button<\/span>>\r\n<\/span>    <<\/span>\/div<\/span>>\r\n<\/span>  );<\/span>\r\n};<\/span>\r\n\r\n<\/code><\/pre>\n
\u6211\u5728 useCounter.ts \u4e2d\u5b9a\u4e49\u4e86 count \u53d8\u91cf\u548c handleIncrement \u51fd\u6570\u3002
\n\u901a\u8fc7\u5728 Counter.tsx \u4e2d\u8c03\u7528\u5b83\u4eec\uff0c\u6211\u53ef\u4ee5\u4f7f\u7528 count \u548c handleIncrement \u6765\u8fdb\u884c\u6e32\u67d3\u548c\u6267\u884c\u8ba1\u6570\u3002<\/p>\n
Custom Hooks\u7684\u6d4b\u8bd5<\/h4>\n
import<\/span> {<\/span> act<\/span>,<\/span> RenderResult<\/span>,<\/span> renderHook<\/span> }<\/span> from<\/span> \"<\/span>@testing-library\/react-hooks<\/span>\"<\/span>;<\/span>\r\nimport<\/span> {<\/span> useCounter<\/span>,<\/span> ReturnType<\/span> }<\/span> from<\/span> \"<\/span>..\/hooks\/useCounter<\/span>\"<\/span>;<\/span>\r\n\r\ndescribe<\/span>(<\/span>\"<\/span>useCounter<\/span>\"<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  let<\/span> result<\/span>:<\/span> RenderResult<\/span><<\/span>ReturnType<\/span>><\/span>;<\/span>\r\n\r\n  beforeEach<\/span>(()<\/span> =><\/span> {<\/span>\r\n    result<\/span> =<\/span> renderHook<\/span>(()<\/span> =><\/span> useCounter<\/span>()).<\/span>result<\/span>;<\/span>\r\n  });<\/span>\r\n\r\n  it<\/span>(<\/span>\"<\/span>count\u306e\u521d\u671f\u5024\u306f0\u3067\u3042\u308b<\/span>\"<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n    expect<\/span>(<\/span>result<\/span>.<\/span>current<\/span>.<\/span>count<\/span>).<\/span>toBe<\/span>(<\/span>0<\/span>);<\/span>\r\n  });<\/span>\r\n\r\n  it<\/span>(<\/span>\"<\/span>handleIncrement\u30921\u5ea6\u547c\u3093\u3060\u5f8c\u3001count\u306e\u5024\u306f1\u3067\u3042\u308b<\/span>\"<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n    act<\/span>(()<\/span> =><\/span> {<\/span>\r\n      result<\/span>.<\/span>current<\/span>.<\/span>handleIncrement<\/span>();<\/span>\r\n    });<\/span>\r\n    expect<\/span>(<\/span>result<\/span>.<\/span>current<\/span>.<\/span>count<\/span>).<\/span>toBe<\/span>(<\/span>1<\/span>);<\/span>\r\n  });<\/span>\r\n});<\/span>\r\n\r\n<\/code><\/pre>\n
\u6211\u6b63\u5728\u4f7f\u7528 react-testing-library \u5b9e\u73b0\u6d4b\u8bd5\u3002
\n\u901a\u8fc7\u4f7f\u7528 react-testing-library \u7684 renderHook \u51fd\u6570\uff0c\u53ef\u4ee5\u6d4b\u8bd5 hooks\u3002\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n
\u9700\u8981\u5728act\u51fd\u6570\u4e2d\u8c03\u7528\u7c7b\u4f3chandleIncrement\u8fd9\u6837\u7684\u51fd\u6570\u6765\u66f4\u65b0\u72b6\u6001\u3002<\/p>\n
\u8f93\u5165\u6587\u672c\u7684\u793a\u4f8b<\/h3>\n
\u4e0b\u9762\u5c06\u4e3areact\u4e2d\u5e38\u7528\u7684input\u6807\u7b7e\u7684\u81ea\u5b9a\u4e49Hooks\u793a\u4f8b\u7f16\u5199\u4ee3\u7801\u3002
\n\u9274\u4e8e\u8fd9\u4e48\u597d\u7684\u673a\u4f1a\uff0c\u6211\u4eec\u5c06\u5904\u7406\u4e24\u4e2a\u72b6\u6001\uff1a\u540d\u5b57\uff08firstName\uff09\u548c\u59d3\u6c0f\uff08lastName\uff09\u3002
\n\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u5c06\u6dfb\u52a0\u4e00\u4e2a\u7b80\u5355\u7684\u9a8c\u8bc1\uff0c\u9650\u5236firstName\u4e0d\u8d85\u8fc78\u4e2a\u5b57\u7b26\uff0clastName\u4e0d\u8d85\u8fc76\u4e2a\u5b57\u7b26\u3002
\n\u901a\u8fc7input\u6807\u7b7e\u4ece\u7528\u6237\u63a5\u6536\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\u5728React\u7ec4\u4ef6\u4e2d\u76f4\u63a5\u7f16\u5199<\/h4>\n
export<\/span> const<\/span> TextInput<\/span>:<\/span> React<\/span>.<\/span>FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>firstName<\/span>,<\/span> setFirstName<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>\"\"<\/span>);<\/span>\r\n  const<\/span> [<\/span>lastName<\/span>,<\/span> setLastName<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>\"\"<\/span>);<\/span>\r\n\r\n  const<\/span> handleChangeFirstName<\/span> =<\/span> useCallback<\/span>(<\/span>\r\n    (<\/span>ev<\/span>:<\/span> React<\/span>.<\/span>ChangeEvent<\/span><<\/span>HTMLInputElement<\/span>><\/span>)<\/span> =><\/span> {<\/span>\r\n      \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3 8\u6587\u5b57\u307e\u3067<\/span>\r\n      if <\/span>(<\/span>firstName<\/span>.<\/span>length<\/span> >=<\/span> 8<\/span>)<\/span> {<\/span>\r\n        return<\/span>;<\/span>\r\n      }<\/span>\r\n      setFirstName<\/span>(<\/span>ev<\/span>.<\/span>target<\/span>.<\/span>value<\/span>);<\/span>\r\n    },<\/span>\r\n    [<\/span>firstName<\/span>]<\/span>\r\n  );<\/span>\r\n  const<\/span> handleChangeLastName<\/span> =<\/span> useCallback<\/span>(<\/span>\r\n    (<\/span>ev<\/span>:<\/span> React<\/span>.<\/span>ChangeEvent<\/span><<\/span>HTMLInputElement<\/span>><\/span>)<\/span> =><\/span> {<\/span>\r\n      \/\/  \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3 6\u6587\u5b57\u307e\u3067<\/span>\r\n      if <\/span>(<\/span>lastName<\/span>.<\/span>length<\/span> >=<\/span> 6<\/span>)<\/span> {<\/span>\r\n        return<\/span>;<\/span>\r\n      }<\/span>\r\n      setLastName<\/span>(<\/span>ev<\/span>.<\/span>target<\/span>.<\/span>value<\/span>);<\/span>\r\n    },<\/span>\r\n    [<\/span>lastName<\/span>]<\/span>\r\n  );<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>input<\/span> type<\/span>=<\/span>\"<\/span>text<\/span>\"<\/span> value<\/span>=<\/span>{<\/span>firstName<\/span>}<\/span> onChange<\/span>=<\/span>{<\/span>handleChangeFirstName<\/span>}<\/span> \/<\/span>>\r\n<\/span>      <<\/span>input<\/span> type<\/span>=<\/span>\"<\/span>text<\/span>\"<\/span> value<\/span>=<\/span>{<\/span>lastName<\/span>}<\/span> onChange<\/span>=<\/span>{<\/span>handleChangeLastName<\/span>}<\/span> \/<\/span>>\r\n<\/span>    <<\/span>\/div<\/span>>\r\n<\/span>  );<\/span>\r\n};<\/span>\r\n\r\n<\/code><\/pre>\n
\u5982\u679c\u72b6\u6001\u589e\u52a0\u5230\u4e09\u4e2a\u6216\u56db\u4e2a\uff0c\u5199\u8d77\u6765\u4f1a\u975e\u5e38\u56f0\u96be\uff0c\u800c\u4e14\u9a8c\u8bc1\u90e8\u5206\u5982\u679c\u90fd\u8981\u624b\u52a8\u7f16\u5199\u7684\u8bdd\u4f1a\u53d8\u5f97\u5f88\u7e41\u7410\u3002<\/p>\n
\u5c06Custom Hook\u5206\u79bb<\/h4>\n
export<\/span> type<\/span> ReturnType<\/span> =<\/span> [<\/span>\r\n  string<\/span>,<\/span>\r\n  (<\/span>ev<\/span>:<\/span> React<\/span>.<\/span>ChangeEvent<\/span><<\/span>HTMLInputElement<\/span>><\/span>)<\/span> =><\/span> void<\/span>\r\n];<\/span>\r\n\r\nexport<\/span> const<\/span> useTextInput<\/span> =<\/span> (<\/span>maxLength<\/span>:<\/span> number<\/span>):<\/span> ReturnType<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>value<\/span>,<\/span> setValue<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>\"\"<\/span>);<\/span>\r\n\r\n  const<\/span> handleChange<\/span> =<\/span> useCallback<\/span>(<\/span>\r\n    (<\/span>ev<\/span>:<\/span> React<\/span>.<\/span>ChangeEvent<\/span><<\/span>HTMLInputElement<\/span>><\/span>)<\/span> =><\/span> {<\/span>\r\n      if <\/span>(<\/span>value<\/span>.<\/span>length<\/span> >=<\/span> maxLength<\/span>)<\/span> {<\/span>\r\n        return<\/span>;<\/span>\r\n      }<\/span>\r\n      setValue<\/span>(<\/span>ev<\/span>.<\/span>target<\/span>.<\/span>value<\/span>);<\/span>\r\n    },<\/span>\r\n    [<\/span>value<\/span>,<\/span> maxLength<\/span>]<\/span>\r\n  );<\/span>\r\n\r\n  return<\/span> [<\/span>value<\/span>,<\/span> handleChange<\/span>];<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\r\nexport<\/span> const<\/span> TextInput<\/span>:<\/span> React<\/span>.<\/span>FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>firstName<\/span>,<\/span> handleChangeFirstName<\/span>]<\/span> =<\/span> useTextInput<\/span>(<\/span>8<\/span>);<\/span>\r\n  const<\/span> [<\/span>lastName<\/span>,<\/span> handleChangeLastName<\/span>]<\/span> =<\/span> useTextInput<\/span>(<\/span>6<\/span>);<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>input<\/span> type<\/span>=<\/span>\"<\/span>text<\/span>\"<\/span> value<\/span>=<\/span>{<\/span>firstName<\/span>}<\/span> onChange<\/span>=<\/span>{<\/span>handleChangeFirstName<\/span>}<\/span> \/<\/span>>\r\n<\/span>      <<\/span>input<\/span> type<\/span>=<\/span>\"<\/span>text<\/span>\"<\/span> value<\/span>=<\/span>{<\/span>lastName<\/span>}<\/span> onChange<\/span>=<\/span>{<\/span>handleChangeLastName<\/span>}<\/span> \/<\/span>>\r\n<\/span>    <<\/span>\/div<\/span>>\r\n<\/span>  );<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u5728 useCounter.ts \u4e2d\u5b9a\u4e49\u4e86 value \u53d8\u91cf\u548c handleChange \u51fd\u6570\u3002
\n\u5728 React \u7ec4\u4ef6\u4e2d\u7684\u4ee3\u7801\u91cf\u5927\u5927\u51cf\u5c11\u3002
\n\u53e6\u5916\uff0c\u5c06 useTextInput \u7684\u53c2\u6570\u8bbe\u7f6e\u4e3a\u76f8\u5e94\u7684\u6700\u5927\u8f93\u5165\u5b57\u7b26\u6570\u3002<\/p>\n
\u51fd\u6570\u7684\u8fd4\u56de\u503c<\/h4>\n
\u5728`useCounter.ts`\u548c`useTextInput`\u4e2d\uff0c\u8fd4\u56de\u7684\u5f62\u5f0f\u4e0d\u540c\u3002\u5982\u679c\u4ee5\u5bf9\u8c61\u7684\u5f62\u5f0f\u8fd4\u56de\uff0c\u90a3\u4e48\u5728\u8c03\u7528\u65f6\u53ea\u80fd\u4f7f\u7528\u57fa\u672c\u76f8\u540c\u7684\u53d8\u91cf\u540d\u548c\u51fd\u6570\u540d\u6765\u8c03\u7528\u3002<\/p>\n
const { count, handleIncrement } = useCounter();\r\n<\/code><\/pre>\n
\u4e00\u79cd\u65b9\u6cd5\u662f\u5c06\u5176\u653e\u5165\u6570\u7ec4\u5e76\u8fd4\u56de\uff0c\u8fd9\u6837\u5728\u8c03\u7528\u65f6\u53ef\u4ee5\u7ed9\u5b83\u53d6\u53e6\u4e00\u4e2a\u540d\u79f0\u3002<\/p>\n
const [ name, handleChangeName ] = useTextInput();\r\nconst [ counter, setCounter] = useState<number>(0);\r\nconst [ name, setName ] = useState<string>(\"\");\r\n<\/code><\/pre>\n
\u5728\u524d\u4e00\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u53ea\u8c03\u7528\u60a8\u9700\u8981\u7684\u5185\u5bb9\uff0c\u800c\u540e\u8005\u5219\u9700\u8981\u6309\u987a\u5e8f\u8c03\u7528\u76f8\u5e94\u7684\u5185\u5bb9\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u53ea\u60f3\u8c03\u7528 useTextInput \uff0c\u800c\u4e0d\u662f handleChangeName \uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u64cd\u4f5c\u3002<\/p>\n
const [ , handleChangeName ] = useTextInput();\r\n<\/code><\/pre>\n
\u6d4b\u8bd5\u81ea\u5b9a\u4e49\u94a9\u5b50<\/h4>\n
\r\ndescribe<\/span>(<\/span>\"<\/span>UseTextInput<\/span>\"<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  let<\/span> result<\/span>:<\/span> RenderResult<\/span><<\/span>ReturnType<\/span>><\/span>;<\/span>\r\n  beforeEach<\/span>(()<\/span> =><\/span> {<\/span>\r\n    result<\/span> =<\/span> renderHook<\/span>(()<\/span> =><\/span> useTextInput<\/span>(<\/span>10<\/span>)).<\/span>result<\/span>;<\/span>\r\n  });<\/span>\r\n\r\n  test<\/span>(<\/span>\"<\/span>\u521d\u671f\u5024\u306f\u7a7a\u6587\u5b57\u3067\u3042\u308b<\/span>\"<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n    const<\/span> [<\/span>value<\/span>]<\/span> =<\/span> result<\/span>.<\/span>current<\/span>;<\/span>\r\n    expect<\/span>(<\/span>value<\/span>).<\/span>toBe<\/span>(<\/span>\"\"<\/span>);<\/span>\r\n  });<\/span>\r\n\r\n  test<\/span>(<\/span>\"<\/span>\u5165\u529b\u5024\u304c\u53cd\u6620\u3055\u308c\u308b<\/span>\"<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n    const<\/span> {<\/span> container<\/span> }<\/span> =<\/span> render<\/span>(<\/span><<\/span>input<\/span> type<\/span>=<\/span>\"<\/span>text<\/span>\"<\/span> {...[<\/span>result<\/span>.<\/span>current<\/span>]}<\/span> \/><\/span>)<\/span>;\r\n<\/span>\r\n    const<\/span> input<\/span> =<\/span> container<\/span>.<\/span>querySelector<\/span>(<\/span>\"<\/span>input<\/span>\"<\/span>);<\/span>\r\n\r\n    fireEvent<\/span>.<\/span>change<\/span>(<\/span>input<\/span>!<\/span>,<\/span> {<\/span> target<\/span>:<\/span> {<\/span> value<\/span>:<\/span> \"<\/span>test<\/span>\"<\/span> }<\/span> });<\/span>\r\n\r\n    expect<\/span>(<\/span>input<\/span>!<\/span>.<\/span>value<\/span>).<\/span>toBe<\/span>(<\/span>\"<\/span>test<\/span>\"<\/span>);<\/span>\r\n  });<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u5728 useTextInput.spec.tsx \u6587\u4ef6\u4e2d\uff0c\u6211\u4eec\u5c06\u4e0e DOM \u6d4b\u8bd5\u76f8\u7ed3\u5408\u6765\u6d4b\u8bd5\u81ea\u5b9a\u4e49 Hook\u3002\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u7528\u4e8e\u6d4b\u8bd5\u7684\u8f93\u5165\u6846\uff0c\u5e76\u5c06\u901a\u8fc7 useTextInput \u521b\u5efa\u7684\u503c\u548c\u51fd\u6570\u4f20\u9012\u7ed9\u5b83\u3002<\/p>\n
\u5982\u679c\u5bf9\u8fd9\u79cd\u505a\u6cd5\u6709\u66f4\u597d\u7684\u65b9\u6cd5\u7684\u8bdd\uff0c\u8bf7\u52a1\u5fc5\u5206\u4eab\u60a8\u7684\u610f\u89c1\uff01\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u597d\uff01<\/p>\n
\u6700\u5f8c<\/h2>\n
\u4f5c\u4e3a\u4eca\u540e\u60f3\u8981\u91c7\u53d6\u7684\u8bbe\u8ba1\u65b9\u9488\uff0c\u5927\u81f4\u5982\u4e0b\u3002<\/p>\n
    \n
  • \n
      react \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304b\u3089 Custom Hook \u306b\u5206\u96e2\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          Custom Hook \u306e\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u306f\u3069\u3093\u3069\u3093\u3084\u3063\u3066\u3044\u304f<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            DOM \u306e\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u306f\u30ea\u30bd\u30fc\u30b9\u3068\u76f8\u8ac7\u3057\u3064\u3064\u9811\u5f35\u3063\u3066\u3044\u304d\u307e\u3059<\/ul>\n
            \u6211\u4f1a\u52aa\u529b\u4e0e\u6d4b\u8bd5\u53cb\u597d\u5408\u4f5c\uff0c\u7f16\u5199\u5b89\u5168\u7684\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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