Unable to set window size in Headless Chrome (Selenium)

[no...@agentiq.com]

Hi all, I'm trying to run Headless Chrome so that I can run our Robot Selenium tests in Docker.  But the default window size is a little too small.  How do I fix this?  I'm running headless using this function:

Open Headless Chrome Browser

    [arguments]  ${page}

    ${chrome_options} =     Evaluate    sys.modules['selenium.webdriver'].ChromeOptions()    sys, selenium.webdriver

    Call Method    ${chrome_options}   add_argument    headless

    Call Method    ${chrome_options}   add_argument    disable-gpu

    ${options}=     Call Method     ${chrome_options}    to_capabilities

    Open Browser    ${page}    browser=chrome    remote_url=${REMOTESERVER}     desired_capabilities=${options}

This works just fine.  However, adding in 

"    Call Method    ${chrome_options}   add_argument    window-size=1920,1080"

 (gotten from here:  https://stackoverflow.com/questions/43541925/how-to-set-the-browser-window-size-when-using-google-chrome-headless ) fails, showing

Calling method 'add_argument' failed: TypeError: add_argument() got an unexpected keyword argument 'window-size'

If I then run it without the =1920,1080 at the end it runs and seems to recognize the error, then crashes.  So how does one set the window size to something appropriate?

[Raghul Jayagopal]

Hi Noah,

Have u tried "Set Window Size” keyword.

Regards,

RJ

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[Raghul Jayagopal]

Alternate capability you use try "start-maximized”

Regards,

RJ

On 27 Apr 2018, at 9:45 am, no...@agentiq.com wrote:

[Mariusz Truszkowski]

Try this:

Call Method    ${chrome_options}    add_argument    window-size\=1920x1080

[Barry]

None of those work for me.  The real problem is that Chrome Settings fails to recognize device pixel ratio on a Retina laptop, so my screen sticks at 1/2 size, which puts it into Responsive mode and I get a reduced interface.  Not fixed, but not Robot's fault, IMHO.

[Douglas Rosa]

I'ts works for me... try it...

Open Browser To Login Page

${chrome_options}= Evaluate

... sys.modules['selenium.webdriver'].ChromeOptions() sys

Call Method ${chrome_options} add_argument test-type

Call Method ${chrome_options} add_argument --disable-extensions

Call Method ${chrome_options} add_argument --headless

Call Method ${chrome_options} add_argument --disable-gpu

Call Method ${chrome_options} add_argument --no-sandbox

Create Webdriver ${BROWSER} executable_path=${PATH} chrome_options=${chrome_options}

Set Window Size 1920 1080

Go To ${LOGIN_URL}

--

[Barry]

Thanks, Douglas - the last line fixed it by setting it in the failing test: Set Window Size as Raghul Jayagopal mentioned above.  I was trying to set it from earlier documentation I had that Mariusz Truszkowski mentioned above:

Call Method    ${c_opts}   add_argument    window-size\=1920,1080

That doesn't work.    This does:  Set Window Size    1920    1080

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[Damodharan Baskaran]

You can set the window size as argument by this way.

${ws}=    Set Variable    window-size=1920,1080

Call Method    ${chrome options}    add_argument    ${ws}

Thanks,

Damodharan B