Typescript 错误 TS2451：无法重新声明块作用域变量 'chai_1'

Question

这是我的演示库 https://github.com/mareru/webdriverIO-shop-demo。
我正在使用 webdriverIOv6 和 Typescript v4。
在 运行 npm test 之后，我得到这个错误：

src/pages/modules/headerModule.ts(4,7): error TS2451: Cannot redeclare block-scoped variable 'chai_1'.
src/pages/modules/headerModule.ts(5,7): error TS2451: Cannot redeclare block-scoped variable 'testingData_1'.

我尝试在文件顶部添加 export {};。
我试着在 tsconfig.json 文件中添加这个：

"moduleResolution": "node",
"resolveJsonModule": true,
"esModuleInterop": true  

但没有任何帮助。

这是我的 tsconfig.json 文件：

{
"compilerOptions": {
"baseUrl": ".",
"paths": {
  "*": [
    "./*"
  ],
  "src/*": [
    "./src/*"
  ],
  "test/*": [
    "src/step_definitions/*"
  ]
},
/* Basic Options */
"target": "es2016",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
"module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
// "lib": [],                             /* Specify library files to be included in the compilation. */
// "allowJs": true,                       /* Allow javascript files to be compiled. */
// "checkJs": true,                       /* Report errors in .js files. */
// "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
// "declaration": true,                   /* Generates corresponding '.d.ts' file. */
// "sourceMap": true,                     /* Generates corresponding '.map' file. */
// "outFile": "./",                       /* Concatenate and emit output to single file. */
// "outDir": "./",                        /* Redirect output structure to the directory. */
// "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
// "removeComments": true,                /* Do not emit comments to output. */
// "noEmit": true,                        /* Do not emit outputs. */
// "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
// "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
// "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */

/* Strict Type-Checking Options */
"strict": true,                           /* Enable all strict type-checking options. */
"noImplicitAny": false,                   /* Raise error on expressions and declarations with an implied 'any' type. */
// "strictNullChecks": true,              /* Enable strict null checks. */
// "strictFunctionTypes": true,           /* Enable strict checking of function types. */
// "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
// "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
// "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */

/* Additional Checks */
// "noUnusedLocals": true,                /* Report errors on unused locals. */
// "noUnusedParameters": true,            /* Report errors on unused parameters. */
// "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
// "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */

/* Module Resolution Options */
"moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
// "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
// "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
// "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
// "typeRoots": [],                       /* List of folders to include type definitions from. */
"types": ["@wdio/sync","cucumber", "node", "@wdio/applitools-service"], /* Type declaration files to be included in compilation. */
"typeRoots": ["./types"],
"allowSyntheticDefaultImports": true,     /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
"esModuleInterop": true,                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
// "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */

/* Source Map Options */
// "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
// "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
// "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

/* Experimental Options */
// "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
// "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
"resolveJsonModule": true
 }
}

为什么我不能在我的 .ts 文件中使用 import {expect} from 'chai';？
为什么我不能在我的 .ts 文件中使用 import {testingData} from 'src/constants/testingData';？
我在哪里重新声明这些变量，我只是导入并使用它们...

谢谢！

Answer 1

这一行：
require('ts-node').register({files: true}); in wdio.conf.ts 在 before 函数中引起了麻烦。我不明白为什么会这样，但是一旦我将其注释掉，错误就消失了。
如果有人对此有深入的解释，请随时分享。
我希望这会帮助其他正在努力解决这些错误的人。
谢谢！