testClearCurrentInteraction() Tests that the caret is moved properly when the current interaction is cleared.
public void
testHistoryRecallNextMovesToEnd() Tests that moving the caret down (recalling the next command from history) will move the caret to the end of
the document.
public void
testHistoryRecallPrevMovesToEnd() Tests that moving the caret up (recalling the previous command from history) will move the caret to the end
of the document.
public void
testInitialPosition() Tests that this.setUp() puts the caret in the correct position.