如何正确调用Nightwatch.runTests？

Question

当我从代码中调用Nightwatch.runTests方法时，我得到一个错误：

/ Connecting to 127.0.0.1 on port 4444...
    POST  /wd/hub/session - ECONNREFUSED
‼ Error connecting to 127.0.0.1 on port 4444.
_________________________________________________

   Error: An error occurred while retrieving a new session: "Connection refused to 127.0.0.1:4444". If the Webdriver/Selenium service is managed by Nightwatch, check if "start_process" is set to "true".    
       at Socket.socketErrorListener (_http_client.js:407:9)
       at emitErrorNT (internal/streams/destroy.js:84:8)
       at processTicksAndRejections (internal/process/task_queues.js:80:21)

文档here和here指出该方法接受两个参数: testSource和settings。作为testSource，我指定了包含测试的文件夹的路径。对于设置，我指定一个等同于nightwatch.json文件内容的json对象。如错误所述，参数"start_process“设置为true。

下面是要重现的代码：

const Nightwatch = require('nightwatch');
const seleniumServer = require('selenium-server-standalone-jar');
const chromedriver = require('chromedriver');

const settings = {
    src_folders: ['tests'],
    output_folder: 'reports',
    detailed_output: true,
    live_output: true,
    selenium: {
        start_process: false,
        "server_path": seleniumServer.path,
        "log_path": "logs",
        "host": "127.0.0.1",
        "port": 4444,
        "cli_args": {
            "trustAllSSLCertificates": true,
            "webdriver.chrome.driver": chromedriver.path
        }
    },
    test_settings: {
        default: {
            silent: true,
            disable_error_log: false,
            screenshots: {
                enabled: false,
                path: 'screenshots',
                on_failure: true
            },
        },
        chrome: {
            desiredCapabilities: {
                browserName: 'chrome',
                javascriptEnabled: true,
                acceptSslCerts: true,
                chromeOptions: {
                    w3c: false
                }
            }
        }
    }
};

Nightwatch.runTests('tests', settings).then(function() {
    // Tests finished
}).catch(function(err) {
    // An error occurred
});

在我的项目中，我使用了"nightwatch"："^ 1.3.6“和"selenium-server-standalone-jar"："^ 3.141.59”。

我还根据自动生成的文件“nightwatch.conf.js”的结构更改了设置对象：

const settings = {
    src_folders: ['tests'],
    output_folder: 'reports',
    detailed_output: true,
    live_output: true,

    test_settings: {
        default: {
            disable_error_log: false,
            launch_url: 'https://nightwatchjs.org',

            screenshots: {
                enabled: false,
                path: 'screens',
                on_failure: true
            },

            desiredCapabilities: {
                browserName: 'chrome'
            },

            webdriver: {
                start_process: true,
                server_path: chromedriver.path
            }
        },

        chrome: {
            desiredCapabilities: {
                browserName: 'chrome',
                chromeOptions: {
                    args: []
                }
            },

            webdriver: {
                start_process: true,
                port: 9515,
                server_path: chromedriver.path,
                cli_args: []
            }
        },

        selenium: {
            selenium: {
                start_process: true,
                port: 4444,
                server_path: seleniumServer.path,
                cli_args: {
                    'webdriver.chrome.driver': chromedriver.path
                }
            }
        },

        'selenium.chrome': {
            extends: 'selenium',
            desiredCapabilities: {
                browserName: 'chrome',
                chromeOptions: {
                    w3c: true
                }
            }
        }
    }
};

但这并没有帮助，错误继续出现。

如果有人能帮助解决这个问题，我将不胜感激。

Answer 1

你需要设置start_process: true，而不是start_process: false，你需要有效地设置w3c: true而不是w3c: false：

const settings = {
    src_folders: ['tests'],
    output_folder: 'reports',
    detailed_output: true,
    live_output: true,
    selenium: {
        start_process: true,
        .
        .
        "cli_args": {
            "trustAllSSLCertificates": true,
            "webdriver.chrome.driver": chromedriver.path
        }

和

chrome: {
    desiredCapabilities: {
        browserName: 'chrome',
        javascriptEnabled: true,
        acceptSslCerts: true,
        chromeOptions: {
            w3c: true
        }
    }
}