How to use custom ResponseParser?

[onelesd]

The warning below is printed when an element is found on the page and is visible, but it's position shifts due to a changing DOM before the click() is executed.

find_element({:xpath, "//span"})
|> click()

16:33:06.734 [warn]  unknown error: Element <span>...</span> is not clickable at point (1153, 90). Other element would receive the click: <div></div>
  (Session info: chrome=63.0.3239.132)
  (Driver info: chromedriver=2.35.528157 (4429ca2590d6988c0745c24c8858745aaaec01ef),platform=Mac OS X 10.13.2 x86_64)

No exception is raised (unlike a click() of an element that is not visible, which raises "element is not visible"), so there is no way to catch this error and try again.

A kludge is to sample the element's location N times before attempting the click, but we still have a race condition that is prone to breakage.

Is there another technique?

[onelesd]

I see that warning?/1 is defoverridable in Hound.ResponseParser, which I would have raise the exception. It seems to be hard-coded based on the selected driver here:

hound/lib/hound/request_utils.ex

Lines 61 to 73 in 7b3ff55

	defp response_parser do
	{:ok, driver_info} = Hound.driver_info
	case driver_info.driver do
	"selenium" ->
	Hound.ResponseParsers.Selenium
	"chrome_driver" ->
	Hound.ResponseParsers.ChromeDriver
	"phantomjs" ->
	Hound.ResponseParsers.PhantomJs
	other_driver ->
	raise "No response parser found for #{other_driver}"
	end
	end

How do I set a custom ResponseParser?

[danhper]

Hi, sorry for the delay.
The current implementation does not allow to set a custom parser. If you would like to send a PR to implement this, you are very welcome.
Thank you.