如何为 DefinitelyTyped 的 React Native 库编写测试?

How to write the tests for a React Native library for DefinitelyTyped?

我想为 rn-placeholder library for React Native by providing the types for DefinitelyTyped 做贡献。这是我第一次向 DefinitelyTyped 贡献 index.d.ts 文件。

我写了声明文件。现在我想写强制性的 rn-placeholder-tests.ts 文件。但是当我尝试使用我的声明时,我得到 regexp 错误:

[ts]
Conversion of type 'RegExp' to type 'View' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
  Property 'measure' is missing in type 'RegExp'.

我什至试过从 @types/react-native 复制测试,他们给出了同样的错误:

import * as React from 'react';
import { Text, View } from "react-native";

class CustomView extends React.Component {
  render() {
    return <View />
  }
}

这是我的 tsconfig.json:

{
    "compilerOptions": {
        "module": "commonjs",
        "lib": ["es6"],
        "noImplicitAny": true,
        "noImplicitThis": true,
        "strictNullChecks": true,
        "jsx": "react",
        "baseUrl": "../",
        "typeRoots": ["../"],
        "types": [],
        "noEmit": true,
        "forceConsistentCasingInFileNames": true
    },
    "files": ["index.d.ts", "rn-placeholder-tests.ts"]
}

其他文件就是使用 npx dts-gen --dt --name my-package-name --template module.

时的生成方式

我怎样才能通过测试?

编辑: 我将 rn-placeholder-tests.ts 转换为 .tsx,从而消除了 regexp 错误。但是现在 TSLint 抱怨找不到模块:

[ts] Cannot find module 'react'.
[ts] Cannot find module 'react-native'.
[ts] Cannot find module 'rn-placeholder'.

这是怎么回事?

就文件扩展名而言,将 .ts 更改为 .tsx 是正确的做法。 (在此处查看有关 tsx 的更多信息:https://www.typescriptlang.org/docs/handbook/jsx.html

对于其他 "Cannot find module" 个错误,请参阅此

您可能需要添加类型定义:

npm i -D @types/react

或者,也许您只需要将 "moduleResolution" 添加到 tsconfig.json 文件中:

"compilerOptions": {
          ...
          "moduleResolution": "node" <---------- this entry
          ...
}