This tests that UIEvent and its subclass will have sourceCapabilities set to be null by default, and it can also be passed when initialization.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

PASS uievent is non-null.
PASS uievent.sourceCapabilities is null
PASS uievent.sourceCapabilities is non-null.
PASS uievent.sourceCapabilities.firesTouchEvents is false
PASS uievent.sourceCapabilities is non-null.
PASS uievent.sourceCapabilities.firesTouchEvents is true
PASS touchevent is non-null.
PASS touchevent.sourceCapabilities is null
PASS mouseevent is non-null.
PASS mouseevent.sourceCapabilities is null
PASS mouseevent.sourceCapabilities is non-null.
PASS mouseevent.sourceCapabilities.firesTouchEvents is false
PASS keyboardevent is non-null.
PASS keyboardevent.sourceCapabilities is null
PASS keyboardevent.sourceCapabilities is non-null.
PASS keyboardevent.sourceCapabilities.firesTouchEvents is false
PASS focusevent is non-null.
PASS focusevent.sourceCapabilities is null
PASS focusevent.sourceCapabilities is non-null.
PASS focusevent.sourceCapabilities.firesTouchEvents is false
PASS compositionevent is non-null.
PASS compositionevent.sourceCapabilities is null
PASS compositionevent.sourceCapabilities is non-null.
PASS compositionevent.sourceCapabilities.firesTouchEvents is false
PASS successfullyParsed is true

TEST COMPLETE