Bug 176882 [DataBinding] Create SWTObservables.observeEditable(...)
We need to provide an observable for the editable property of Text.
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/jface/tests/databinding/swt/SWTObservablesTest.java
}
	public void testObserveTextOfCCombo() throws Exception {
		CCombo combo = new CCombo(shell, SWT.NONE);
		ISWTObservableValue value = SWTObservables.observeText(combo);
		assertNotNull(value);
		assertTrue(value instanceof CComboObservableValue);
		CComboObservableValue ccomboObservable = (CComboObservableValue) value;
		assertEquals(SWTProperties.TEXT, ccomboObservable.getAttribute());
	}
	public void testObserveTextOfUnsupportedControl() throws Exception {
		Table table = new Table(shell, SWT.NONE);
		try {
			SWTObservables.observeText(table);
			fail("Exception should have been thrown");
		} catch (IllegalArgumentException e) {
		}
	}
	public void testObserveItemsOfCombo() throws Exception {
		Combo combo = new Combo(shell, SWT.NONE);
		IObservableList list = SWTObservables.observeItems(combo);
		assertNotNull(list);
		assertTrue(list instanceof ComboObservableList);
	}
	public void testObserveItemsOfCCombo() throws Exception {
		CCombo ccombo = new CCombo(shell, SWT.NONE);
		IObservableList list = SWTObservables.observeItems(ccombo);
		assertNotNull(list);
		assertTrue(list instanceof CComboObservableList);
	}
	public void testObserveItemsOfList() throws Exception {