Make tests http/tests/misc/isindex-with-no-form-base-href.html and isindex-with-no-form.html work using DOM keyboard events

• Component: Tools / Tests
• Status: RESOLVED WONTFIX

[Daniel Bates]

Following up from bug #30491, we should make the test cases:
http/tests/misc/isindex-with-no-form-base-href.html
http/tests/misc/isindex-with-no-form.html

work without using DRT's EventSender. Instead, we should rewrite these tests to use DOM keyboard events.

[Daniel Bates]

Created attachment 43241 [details]
Example

Example.

Tries to programmatically fire a keypress DOM KeyboardEvent at an HTMLInputElement with keyIdentifier = "Enter" to submit the form (that is, to simulate what equivalent action when the user gives the input focus and then presses the Return/Enter key on the keyboard)

[Daniel Bates]

Using a debugger to trace the execution of DOM KeyboardEvents, we need to fix bug #16735 in order to fix this bug.

Running the attachment Example <https://bugs.webkit.org/attachment.cgi?id=43241>, we see that the call flow is as follows (*):

WebCore::jsNodePrototypeFunctionDispatchEvent->EventTarget::dispatchEvent->Node::dispatchEvent->Node::dispatchGenericEvent->HTMLInputElement::defaultEventHandler

By line 1412 of HTMLInputElement.cpp <http://trac.webkit.org/browser/trunk/WebCore/html/HTMLInputElement.cpp?rev=50996#L1412>, we call KeyboardEvent::charCode(). Notice, this KeyboardEvent was generated programmatically by JavaScript (as opposed to a physical key press). Hence, this KeyboardEvent has no associated PlatformKeyboardEvent (i.e. KeyboardEvent::m_keyEvent == null). And by line 138 of KeyboardEvent.cpp <http://trac.webkit.org/browser/trunk/WebCore/dom/KeyboardEvent.cpp?rev=38094#L138> method KeyboardEvent::charCode returns 0 if !KeyboardEvent::m_keyEvent. So, for this example, KeyboardEvent::charCode always returns 0. Therefore, we cannot resolve this bug until we resolve bug #16735.

For completeness, before executing (*), the DOM keyboard event is first instantiated via the following call flow:

WebCore::jsDocumentPrototypeFunctionCreateEvent->Document::createEvent->KeyboardEvent::create->KeyboardEvent::KeyboardEvent()

Note, specifically the constructor KeyboardEvent::KeyboardEvent() is called. Hence, m_keyEvent := 0.

Then, the DOM keyboard event is initialized via the call flow: 

WebCore::jsKeyboardEventPrototypeFunctionInitKeyboardEvent->KeyboardEvent::initKeyboardEvent

[Ahmad Saleem]

'isindex' is removed and now historical.

https://github.com/WebKit/WebKit/commit/c92f223d57abd60e7bc682985a103744f3760672

WPT test showing it as historical - http://wpt.live/html/semantics/forms/historical.html

and both of these tests are now removed (in above commit).

So marking this as 'RESOLVED WONTFIX'.