Tools: Allow to pass chromeOptions with arguments such as --headless

[desaib]

I am trying to run headless chrome with arguments with pass with chromeOptions, I have the following config as wct.conf.json but it is not working.

{
    "verbose": false,
    "testTimeout": 30000,
    "expanded": true,
    "persistent": false,
    "browserOptions": {
        "browserName" : "chrome",
        "chromeOptions" : {
            "args" : ["--headless"]
        }
    },
    "plugins": {
        "local": {
            "browsers": [
                "chrome"
            ]
        }
    }
}

P.S Also, it install chromedriver 2.27 which needs to be changed to latest chromedriver 2.29

[elliotweiser]

Looks like there's an open PR to update chromedriver in selenium-standalone: https://github.com/vvo/selenium-standalone/pull/285

[elliotweiser]

I have similar frustration trying to run Web Component Tester v6.0.0 for local headless browser testing with selenium. This doesn't seem to be usable with either the --headless flag or running X Virtual Frame Buffer in the background.

System Info

• WCT 6.0.0
• NodeJS 7.3.0
• CentOS Linux release 7.3.1611 (Core)
• Google Chrome 59.0.3071.86
• Oracle Java 8u131

Some sample output:

Capabilities [{message=unknown error: Chrome failed to start: crashed
  (Driver info: chromedriver=2.27.440175 (9bc1d90b8bfa4dd181fbbf769a5eb5e575574320),platform=Linux 4.9.27-moby x86_64), platform=ANY}]
Session ID: ebefab875035f0e02e02da14458886d9
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:216)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:168)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:635)
    at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:322)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.openqa.selenium.support.events.EventFiringWebDriver$2.invoke(EventFiringWebDriver.java:103)
    at com.sun.proxy.$Proxy4.get(Unknown Source)
    at org.openqa.selenium.support.events.EventFiringWebDriver.get(EventFiringWebDriver.java:162)
    at org.openqa.selenium.remote.server.handler.ChangeUrl.call(ChangeUrl.java:40)
    at org.openqa.selenium.remote.server.handler.ChangeUrl.call(ChangeUrl.java:25)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:176)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)

It would be nice if there was some better documentation/working examples of using browserOptions and chromeOptions for configuring the chrome browser.

On a related note, is it possible to determine/debug which CLI options are _actually_ passed to the google-chrome command via the chromedriver?

[gmcdev]

The problem is actually here:
https://github.com/Polymer/web-component-tester/blob/master/runner/steps.ts#L148

lodash's defaultsDeep method is overriding values that are arrays instead of concatenating them. This is possibly fixed by using mergeWith (plus a callback to handle arrays), but it's not available in wct's packaged version of lodash... Upon updating, lodash@latest is then missing pairs method, which is used by this application. So, damned if you do, damned if you don't.

I will submit a PR tomorrow with my workaround, which uses deepmerge package instead. This correctly concats the arrays.

One last note, if you're trying to pass headless, all of this is dependent on https://github.com/vvo/selenium-standalone/pull/285, which needs to require v2.30.

Lastly, for any poor souls like myself trying to get something like this working, do please be sure you have Chrome v59 installed.

[jaichandra]

This open PR (https://github.com/vvo/selenium-standalone/pull/285) has long been merged. I see this PR referred in multiple related issues. Not sure what is still pending.

[gmcdev]

The --headless problem is solved (I believe). But there is also a problem with lodash implementation. See my last comment. I wasn't able to submit a new PR (at the time) because the ts wasn't compiling.

[paladox]

This is fixed with 24fab4d6b4c7395cbf4f40b2fdf365fb724eb9e0 And instead of chromeOptions it is browserOptions

It is done like

{
  "plugins": {
    "local": {
      "browsers": [
        "chrome"
      ],
      "browserOptions": {
        "chrome": [
          "window-size=1920,1080",
          "headless",
          "disable-gpu"
      }
    }
  }
}

[stramel]

@desaib @usergenic This issue is fixed