summaryrefslogtreecommitdiffstats
path: root/testing/marionette/client/docs/advanced/debug.rst
diff options
context:
space:
mode:
Diffstat (limited to 'testing/marionette/client/docs/advanced/debug.rst')
-rw-r--r--testing/marionette/client/docs/advanced/debug.rst54
1 files changed, 54 insertions, 0 deletions
diff --git a/testing/marionette/client/docs/advanced/debug.rst b/testing/marionette/client/docs/advanced/debug.rst
new file mode 100644
index 000000000..e72d2549b
--- /dev/null
+++ b/testing/marionette/client/docs/advanced/debug.rst
@@ -0,0 +1,54 @@
+Debugging
+=========
+
+.. py:currentmodule:: marionette
+
+Sometimes when working with Marionette you'll run into unexpected behaviour and
+need to do some debugging. This page outlines some of the Marionette methods
+that can be useful to you.
+
+Please note that the best tools for debugging are the `ones that ship with
+Gecko`_. This page doesn't describe how to use those with Marionette. Also see
+a related topic about `using the debugger with Marionette`_ on MDN.
+
+.. _ones that ship with Gecko: https://developer.mozilla.org/en-US/docs/Tools
+.. _using the debugger with Marionette: https://developer.mozilla.org/en-US/docs/Marionette/Debugging
+
+
+Storing Logs on the Server
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+By calling `~Marionette.log` it is possible to store a message on the server.
+Logs can later be retrieved using `~Marionette.get_logs`. For example::
+
+ try:
+ marionette.log("Sending a click event") # logged at INFO level
+ elem.click()
+ except:
+ marionette.log("Something went wrong!", "ERROR")
+
+ print(marionette.get_logs())
+
+Disclaimer: Example for illustrative purposes only, don't actually hide
+tracebacks like that!
+
+
+Seeing What's on the Page
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Sometimes it's difficult to tell what is actually on the page that is being
+manipulated. Either because it happens too fast, the window isn't big enough or
+you are manipulating a remote server! There are two methods that can help you
+out. The first is `~Marionette.screenshot`::
+
+ marionette.screenshot() # takes screenshot of entire frame
+ elem = marionette.find_element(By.ID, 'some-div')
+ marionette.screenshot(elem) # takes a screenshot of only the given element
+
+Sometimes you just want to see the DOM layout. You can do this with the
+`~Marionette.page_source` property. Note that the page source depends on the
+context you are in::
+
+ print(marionette.page_source)
+ marionette.set_context('chrome')
+ print(marionette.page_source)