Is there a way to get the browser's console output from a test?

kepp...@networkoptix.com

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May 18, 2018, 1:43:32 PM5/18/18

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I',m having an issue where for a specific instance of our software, the page just doesn't load when I run headless. It works on others but not there. As it is headless I can't check the console to see if it's upset by something there. Is there a way to get the browser's console output?

Tatu Aalto

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May 18, 2018, 5:30:02 PM5/18/18

to Kyle Epperson, robotframework-users

Ugh

Currently there is not a out of the box keyword in the SeleniumLibrary, but the good news is that one can do by extending SeleniumLibrary. In the Python Selenium API, there is a get_log [1] method, which allows one to collect the logs from many sources. The bad news is that not all browsers has support for the method, but last time I did try Chrome had the best support. There is documentation [2] for extending the SeleniumLibrary and user guide [3] contains lots of good information about libraries and extending other libraries.

-Tatu
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[1] selenium.webdriver.remote.webdriver.WebDriver.get_log

[2] https://github.com/robotframework/SeleniumLibrary/blob/master/docs/extending/EXTENDING_SELENIUMLIBRARY.rst

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

On Fri, 18 May 2018, 20:43 , <kepp...@networkoptix.com> wrote:

I',m having an issue where for a specific instance of our software, the page just doesn't load when I run headless. It works on others but not there. As it is headless I can't check the console to see if it's upset by something there. Is there a way to get the browser's console output?

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kepp...@networkoptix.com

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May 21, 2018, 12:39:59 PM5/21/18

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I tried using your suggestion but I'm having an issue. The documentation claims I should only need one argument "browser" but first of all it claims to want the webdriver instance. When I feed it the webdriver it then wants a second argument. Am I mistaken or is the documentation unclear?

On Friday, May 18, 2018 at 2:30:02 PM UTC-7, Tatu Aalto wrote:

Ugh

Currently there is not a out of the box keyword in the SeleniumLibrary, but the good news is that one can do by extending SeleniumLibrary. In the Python Selenium API, there is a get_log [1] method, which allows one to collect the logs from many sources. The bad news is that not all browsers has support for the method, but last time I did try Chrome had the best support. There is documentation [2] for extending the SeleniumLibrary and user guide [3] contains lots of good information about libraries and extending other libraries.

-Tatu
Send from my mobile
[1] selenium.webdriver.remote.webdriver.WebDriver.get_log
[2] https://github.com/robotframework/SeleniumLibrary/blob/master/docs/extending/EXTENDING_SELENIUMLIBRARY.rst

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

On Fri, 18 May 2018, 20:43 , <kepp...@networkoptix.com> wrote:

I',m having an issue where for a specific instance of our software, the page just doesn't load when I run headless. It works on others but not there. As it is headless I can't check the console to see if it's upset by something there. Is there a way to get the browser's console output?

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Tatu Aalto

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May 21, 2018, 2:31:54 PM5/21/18

to Kyle Epperson, robotframework-users

Ugh

There might be bug in your implementation. Would it be possible to see your code and perhaps we can correct the code?

-Tatu
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On Mon, 21 May 2018, 19:40 , <kepp...@networkoptix.com> wrote:

I tried using your suggestion but I'm having an issue. The documentation claims I should only need one argument "browser" but first of all it claims to want the webdriver instance. When I feed it the webdriver it then wants a second argument. Am I mistaken or is the documentation unclear?

On Friday, May 18, 2018 at 2:30:02 PM UTC-7, Tatu Aalto wrote:

Ugh

Currently there is not a out of the box keyword in the SeleniumLibrary, but the good news is that one can do by extending SeleniumLibrary. In the Python Selenium API, there is a get_log [1] method, which allows one to collect the logs from many sources. The bad news is that not all browsers has support for the method, but last time I did try Chrome had the best support. There is documentation [2] for extending the SeleniumLibrary and user guide [3] contains lots of good information about libraries and extending other libraries.

-Tatu
Send from my mobile
[1] selenium.webdriver.remote.webdriver.WebDriver.get_log
[2] https://github.com/robotframework/SeleniumLibrary/blob/master/docs/extending/EXTENDING_SELENIUMLIBRARY.rst

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

On Fri, 18 May 2018, 20:43 , <kepp...@networkoptix.com> wrote:

I',m having an issue where for a specific instance of our software, the page just doesn't load when I run headless. It works on others but not there. As it is headless I can't check the console to see if it's upset by something there. Is there a way to get the browser's console output?

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kepp...@networkoptix.com

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May 21, 2018, 2:45:30 PM5/21/18

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I have my own custom library and I've tried putting this in both my library and seleniumlibrary. I feel like there has to be something wrong with my implementation.

    def get_browser_log(self):
        return webdriver.remote.webdriver.WebDriver.get_log('browser')

Calling the keyword:

    ${console log}    get browser log
    log    ${console log}

Running my test with this gives this error:

TypeError: unbound method get_log() must be called with WebDriver instance as first argument (got str instance instead)

I have been able to satisfy the requirements:

def get_browser_log(self):
        return webdriver.remote.webdriver.WebDriver.get_log(webdriver.Chrome('<path to> chromedriver.exe'), 'browser')

But this gives me an output that is not useful:

On Monday, May 21, 2018 at 11:31:54 AM UTC-7, Tatu Aalto wrote:

Ugh

There might be bug in your implementation. Would it be possible to see your code and perhaps we can correct the code?

-Tatu
Send from my mobile

On Mon, 21 May 2018, 19:40 , <kepp...@networkoptix.com> wrote:

I tried using your suggestion but I'm having an issue. The documentation claims I should only need one argument "browser" but first of all it claims to want the webdriver instance. When I feed it the webdriver it then wants a second argument. Am I mistaken or is the documentation unclear?

On Friday, May 18, 2018 at 2:30:02 PM UTC-7, Tatu Aalto wrote:

Ugh

Currently there is not a out of the box keyword in the SeleniumLibrary, but the good news is that one can do by extending SeleniumLibrary. In the Python Selenium API, there is a get_log [1] method, which allows one to collect the logs from many sources. The bad news is that not all browsers has support for the method, but last time I did try Chrome had the best support. There is documentation [2] for extending the SeleniumLibrary and user guide [3] contains lots of good information about libraries and extending other libraries.

-Tatu
Send from my mobile
[1] selenium.webdriver.remote.webdriver.WebDriver.get_log
[2] https://github.com/robotframework/SeleniumLibrary/blob/master/docs/extending/EXTENDING_SELENIUMLIBRARY.rst

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

On Fri, 18 May 2018, 20:43 , <kepp...@networkoptix.com> wrote:

I',m having an issue where for a specific instance of our software, the page just doesn't load when I run headless. It works on others but not there. As it is headless I can't check the console to see if it's upset by something there. Is there a way to get the browser's console output?

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Tatu Aalto

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May 21, 2018, 3:49:19 PM5/21/18

to Kyle Epperson, robotframework-users

Ugh

Your code as is not correct and I am bit surprised that it doesn't raise an exception. Before you wonder deeper into the Python, it would be good to read some basic concepts [1][2]. But in any case, your code has a reference to a Python object, in this case it happens to be a class. The reference does not not know what instances have been created out of that that object, in other words, reference is not a cache. If you use SeleniumLibrary, then this should work fine:

def get_log(log):

sl = BuiltIn().get_library_instance('SeleniumLibrary')

return sl.driver.get_log(log)

The second line gets the active SeleniumLibrary instance from the Robot Framework. The third line uses SeleniumLibrary public API, to get the currently active WebDriver instance and uses the get_log method to return the log.

-Tatu
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[1] https://docs.python.org/3/tutorial/classes.html

[2] https://wiki.python.org/moin/IntroductoryBooks

On Mon, 21 May 2018, 21:45 , <kepp...@networkoptix.com> wrote:

I have my own custom library and I've tried putting this in both my library and seleniumlibrary. I feel like there has to be something wrong with my implementation.

def get_browser_log(self): return webdriver.remote.webdriver.WebDriver.get_log('browser')

Calling the keyword:
${console log} get browser log log ${console log}

Running my test with this gives this error:
TypeError: unbound method get_log() must be called with WebDriver instance as first argument (got str instance instead)

I have been able to satisfy the requirements:

(webdriver.Chrome('<path to>chromedriver.exe'), 'browser')

But this gives me an output that is not useful:

On Monday, May 21, 2018 at 11:31:54 AM UTC-7, Tatu Aalto wrote:

Ugh

There might be bug in your implementation. Would it be possible to see your code and perhaps we can correct the code?

-Tatu
Send from my mobile

On Mon, 21 May 2018, 19:40 , <kepp...@networkoptix.com> wrote:

I tried using your suggestion but I'm having an issue. The documentation claims I should only need one argument "browser" but first of all it claims to want the webdriver instance. When I feed it the webdriver it then wants a second argument. Am I mistaken or is the documentation unclear?

On Friday, May 18, 2018 at 2:30:02 PM UTC-7, Tatu Aalto wrote:

Ugh

Currently there is not a out of the box keyword in the SeleniumLibrary, but the good news is that one can do by extending SeleniumLibrary. In the Python Selenium API, there is a get_log [1] method, which allows one to collect the logs from many sources. The bad news is that not all browsers has support for the method, but last time I did try Chrome had the best support. There is documentation [2] for extending the SeleniumLibrary and user guide [3] contains lots of good information about libraries and extending other libraries.

-Tatu
Send from my mobile
[1] selenium.webdriver.remote.webdriver.WebDriver.get_log
[2] https://github.com/robotframework/SeleniumLibrary/blob/master/docs/extending/EXTENDING_SELENIUMLIBRARY.rst

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

On Fri, 18 May 2018, 20:43 , <kepp...@networkoptix.com> wrote:

I',m having an issue where for a specific instance of our software, the page just doesn't load when I run headless. It works on others but not there. As it is headless I can't check the console to see if it's upset by something there. Is there a way to get the browser's console output?

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kepp...@networkoptix.com

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May 21, 2018, 3:55:51 PM5/21/18

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My custom library has a class containing the keywords I made. I didn't think all that would be necessary to provide.

And what you provided makes it make sense. I had tried putting the "get_library_instance" into the get_log parameters but for some reason I didn't think of calling get_log on that instance.

Thanks.

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

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Tatu Aalto

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May 22, 2018, 1:35:35 AM5/22/18

to Kyle Epperson, robotframework-users

Ugh

Well, that I have not done, but something like this could work: https://stackoverflow.com/questions/20401264/how-to-access-network-panel-on-google-chrome-developer-tools-with-selenium

Does someone else have a better idea?

-Tatu
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On Tue, 22 May 2018, 01:53 , <kepp...@networkoptix.com> wrote:

So, it all is working now, thank you. However, it hasn't solved the problem of why I needed the console log. Is there a way to get the network tab logs?

Kyle Epperson

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May 22, 2018, 1:37:38 AM5/22/18

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I ended up just using the remote debugging tool on our site and I get the same results so I think it has something to do with having a self signed certs so... A whole new rabbit hole to go down.

[3] http://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#creating-test-libraries

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