added special keys note (#10403)

web-platform-tests · Apr 10, 2018 · e504871 · e504871
1 parent 1e801bf
commit e504871
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diff --git a/docs/_writing-tests/testdriver.md b/docs/_writing-tests/testdriver.md
@@ -45,5 +45,7 @@ Note that if the element that's keys need to be send to does not have
 a unique ID, the document must not have any DOM mutations made
 between the function being called and the promise settling.
 
+To send special keys, one must send the respective key's codepoint. Since this uses the WebDriver protocol, you can find a list for code points to special keys in the spec (here)[https://w3c.github.io/webdriver/webdriver-spec.html#keyboard-actions].
+For example, to send the tab key you would send "\uE004".
 
 [testharness]: {{ site.baseurl }}{% link _writing-tests/testharness.md %}