Testcafe V1.9.0 UnhandledPromiseRejectionWarning: TypeError: Cannot convert undefined or null to object

Question

我正在失去理智，试图弄清楚为什么 testcafe 如此痛苦。所以这是我的场景：我有一个跑步者可以启动我对 browserstack 的测试。美好的。一旦我将 testcafe 版本从 1.6.1 升级到 1.9.0，browserstack runner 就无法启动。我收到此错误：

(node:12310) UnhandledPromiseRejectionWarning: TypeError: Cannot convert undefined or null to object
    at Function.entries (<anonymous>)
    at TestCafeConfiguration.mergeOptions (/Users/testcafe/node_modules/testcafe/lib/configuration/configuration-base.js:50:16)
    at TestCafeConfiguration.init (/Users/testcafe/node_modules/testcafe/lib/configuration/testcafe-configuration.js:48:14)
    at async getConfiguration (/Users/testcafe/node_modules/testcafe/lib/index.js:41:9)
    at async createTestCafe (/Users/testcafe/node_modules/testcafe/lib/index.js:57:27)
(node:12310) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12310) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

奇怪的是，如果我将我的版本升级到 1.7.0，我没有遇到任何问题。任何版本 1.8.0 及以上我都会收到上述错误。

有人也遇到过这种情况吗？有人可以阐明这个问题吗？

这是我的跑步者SetupRunners.js文件：

import getRunnerSrc from "./getRunnerSrc";
import getRunnerBrowsers from "./getRunnerBrowsers";


export default function setupRunner(runner, options = {}, cb) {
    let stream = false;

    const src = options.src || getRunnerSrc(options.breakpoint);

    if (src && src.length) {
        runner.src(src);

        runner.browsers(
            options.browsers || getRunnerBrowsers(options.breakpoint)
        );
  
        return cb(runner).then(data => {
            if (stream) {
                stream.end();
            }
            return data;
        });
    }
}

这是针对 browserstack 启动测试的文件

import getArgs from "./getArgs";
import sanitizeArg from "./sanitizeArg";
import isBrowserStack from "./getIsBrowserStack";

const defaultBrowsers = {
    desktop: "Chrome:OS X",
    mobile: "Safari:iOS",
};
const browserStackPrefix = "browserstack:";

export default function getRunnerBrowsers(breakpoint) {
    const useBrowserStack = isBrowserStack();

    if (useBrowserStack && breakpoint) {
        return getBrowserstackDevices(breakpoint);
    }

    return `${useBrowserStack ? browserStackPrefix : ""}${sanitizeArg(
        getArgs("browsers") || defaultBrowsers.desktop
    )}`;
}

function getBrowserstackDevices(breakpoint) {
    return `${browserStackPrefix}${getArgs(`${breakpoint}_devices`) ||
        defaultBrowsers[breakpoint]}`;
}

帮手来了getArgs.js:

function getArgs(key) {
    if (process && process.argv && process.argv.length) {
        return process.argv.reduce((val, arg) => {
            const split = arg.split("=");
            if (split[0] === key || split[0] === "--" + key) {
                val = split[1];
            }
            return val;
        }, null);
    }
    return null;
}

module.exports = getArgs;

和santizeArgs.js

export default function sanitizeArg(ar) {
    return filterEmpty((ar || "").split(",").map(str => str.trim()));
}

export function filterEmpty(items) {
    return items.filter(item => item && item.length);
}

=======更新========

在 v1.7.0 中创建 TESTCAFE 函数

async function createTestCafe(hostname, port1, port2, sslOptions, developmentMode, retryTestPages) {
    console.dir
    const configuration = new testcafe_configuration_1.default();
    await configuration.init({
        hostname,
        port1,
        port2,
        ssl: sslOptions,
        developmentMode,
        retryTestPages
    });

将 TESTCAFE 更新到 v1.9.2 后创建 TESTCAFE 函数

async function createTestCafe(...args) {
    const configuration = await getConfiguration(args); // HERE IS WHERE THE ERROR IS
    const [hostname, port1, port2] = await Promise.all([
        getValidHostname(configuration.getOption(option_names_1.default.hostname)),
        getValidPort(configuration.getOption(option_names_1.default.port1)),
        getValidPort(configuration.getOption(option_names_1.default.port2))
    ]);
    configuration.mergeOptions({ hostname, port1, port2 });
    const testcafe = new TestCafe(configuration);
    setupExitHook(cb => testcafe.close().then(cb));
    return testcafe;
}

Answer 1

我根据您的信息重现了该问题，并在 TestCafe GitHub 存储库中创建了一个 issue。作为解决方法，您可以更正传递给 'createTestCafe' 函数的参数值。

根据您共享的输出，您将 'null' 值作为 'hostname' 参数传递。我猜 'null' 值意味着未指定 'hostname' 值。在这种情况下，您需要 return 'undefined' 而不是 'null' 到 'createTestCafe' 函数。

Testcafe V1.9.0 UnhandledPromiseRejectionWarning: TypeError: Cannot convert undefined or null to object

Testcafe V1.9.0 UnhandledPromiseRejectionWarning: TypeError: Cannot convert undefined or null to object

javascript

testing

automated-tests

e2e-testing

testcafe