Protractor gives “Unable to start a WebDriver session” error

问题

I already have started a server with webdriver-manager start, but I get this error when I try to run protractor:

Using the selenium server at http://127.0.0.1:4444/wd/hub
[launcher] Running 1 instances of WebDriver
ERROR - Unable to start a WebDriver session.

C:\...\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\atoms\error.js:113
  var template = new Error(this.message);
                 ^
UnknownError: unknown error: cannot find Chrome binary

My config file looks like this:

exports.config = {
    specs: [
        'test/*.js'
    ],

    capabilities: {
        'browserName': 'chrome'
    },
    seleniumAddress: 'http://127.0.0.1:4444/wd/hub'

};

I have also tried pointing to the binary in the capabilities object as well as adding chromeDriver and seleniumServerJar keys to no avail. Any ideas?

回答1:

According to the relevant github issue, the problem is that chromedriver cannot find chrome browser executeable - on different operating systems it searches for it in different places.

You need to either have chrome installed where chromedriver expects it to be, or specify the path to the chrome executeable in the binary setting:

capabilities: {
    "browserName": "chrome",
    "chromeOptions": {
        binary: "D:/Program Files/Chrome/chrome.exe",
        args: [],
        extensions: [],
    }
},

来源：https://stackoverflow.com/questions/27493715/protractor-gives-unable-to-start-a-webdriver-session-error