我正在使用 webdriverIO v7（最新稳定版本）和 cucumber。
我收到这个错误：
Error: The "from" argument must be of type string. Received undefined2021-04-08T18:29:37.403Z ERROR @wdio/runner: TypeError [ERR_INVALID_ARG_TYPE]: The "from" argument must be of type string. Received undefined
at validateString (internal/validators.js:120:11)
at Object.relative (path.js:437:5)
at getDefinitionLineAndUri (C:\my-project\node_modules\cucumber\lib\support_code_library_builder\build_helpers.js:184:27)
at buildStepDefinitionConfig (C:\my-project\node_modules\cucumber\lib\support_code_library_builder\build_helpers.js:124:7)
at SupportCodeLibraryBuilder.defineStep (C:\my-project\node_modules\cucumber\lib\support_code_library_builder\index.js:51:79)
at Object.<anonymous> (C:\my-project\src\step_definitions\/accountSummary_steps.js:6:1)
at Module._compile (internal/modules/cjs/loader.js:1137:30)
at Module._compile (C:\my-project\node_modules\pirates\lib\index.js:99:24)
at Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
at Object.newLoader [as .js] (C:\my-project\node_modules\pirates\lib\index.js:104:7)
at Module.load (internal/modules/cjs/loader.js:985:32)
at Module._load (internal/modules/cjs/loader.js:878:14)
at Function.hookedLoader [as _load] (C:\my-project\node_modules\mockery\mockery.js:111:12)
at Module.require (internal/modules/cjs/loader.js:1025:19)
at require (internal/modules/cjs/helpers.js:72:18)
at C:\my-project\node_modules\@wdio\cucumber-framework\build\index.js:204:13
在我的帐户Summary_steps.js第6行只有这样：
import loggedInHeaderModule from "../pages/modules/loggedInHeaderModule"
import accountSummaryPage from "../pages/accountSummaryPage"
import {Then, When} from 'cucumber';
When(/^I click on My account details link$/, function () { // This is line 6
loggedInHeaderModule.openAccountSummary();
});
这是我的 package.json 依赖项：
"dependencies": {
"@babel/cli": "^7.2.3",
"@babel/plugin-proposal-export-default-from": "^7.5.2",
"@babel/preset-env": "^7.4.2",
"@babel/register": "^7.4.0",
"@types/cucumber": "^7.0.0",
"@wdio/cli": "^7.3.1",
"@wdio/config": "^7.3.1",
"@wdio/cucumber-framework": "^7.3.1",
"@wdio/local-runner": "^7.3.1",
"@wdio/selenium-standalone-service": "^7.3.1",
"@wdio/spec-reporter": "^7.3.1",
"@wdio/sync": "^7.3.1",
"chai": "^4.3.4",
"cucumber": "^6.0.5",
"eslint-plugin-wdio": "^7.0.0",
"file-system": "^2.2.2",
"mjpeg-consumer": "^2.0.0",
"node-fetch": "^2.6.1",
"webdriverio": "^7.3.1",
"yarn": "^1.22.10"
},
"devDependencies": {
"@babel/core": "^7.4.0",
"@wdio/allure-reporter": "^7.3.1",
"@wdio/browserstack-service": "^7.3.1",
"@wdio/junit-reporter": "^7.3.1",
"babel-eslint": "^10.1.0",
"babel-jest": "^26.6.3",
"eslint": "^7.23.0",
"eslint-plugin-import": "^2.22.1",
"forever": "^3.0.4",
"jest": "^26.6.3",
"npm-run-all": "^4.1.5"
}
有人知道哪里出了问题吗？
谢谢！
我设法通过删除
"cucumber": "^6.0.5""@cucumber/cucumber": "^7.1.0"package.jsonimport {Then, When} from '@cucumber/cucumber';
而不是这个：
import {Then, When} from 'cucumber';
这似乎是 webdriverIO v7 与 Cucumber 集成的新方式。 （如文档中所述）
我对黄瓜有疑问，我也遇到了同样的错误。经过无休止的摆弄之后，我发现包锁定文件看起来有所不同 - 它以 node_modules 开头所有依赖项。我用的黄瓜无法处理这个问题。这与 npm 有关，我将 npm 降级为 < 7. Then I found
npm i --package-lock-only
用以前的格式更新了包锁定文件。
那时我可以运行 npm i 来重新加载 Cucumber。之后就工作了。
我仍然面临这个问题。尝试了所有可能的方法来解决错误，例如：通过使用 import-cwd 解决此问题，以便您的支持代码始终需要当前工作目录（即主机项目）中的 cucumber-js ：
const importCwd = require('import-cwd') const { 给定，何时，然后 } = importCwd('@cucumber/cucumber').
没有什么对我有用。请帮助我找到正确的解决方案。