Bug 266146 [CSS] JUnit for: Property retrieval must check instanceof and return null
tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabFolderTest.java
assertEquals(16, fontData.getHeight());
		assertEquals(SWT.NORMAL, fontData.getStyle());		
	}
	public void testFontBold() throws Exception {
		CTabFolder folderToTest = createTestCTabFolder("CTabFolder { font: Arial 12px; font-weight: bold }");
		assertEquals(1, folderToTest.getFont().getFontData().length);
		FontData fontData = folderToTest.getFont().getFontData()[0];
		assertEquals("Arial", fontData.getName());
		assertEquals(12, fontData.getHeight());
		assertEquals(SWT.BOLD, fontData.getStyle());		
	}
	public void testFontItalic() throws Exception {
		CTabFolder folderToTest = createTestCTabFolder("CTabFolder { font: Arial 12px; font-style: italic }");
		assertEquals(1, folderToTest.getFont().getFontData().length);
		FontData fontData = folderToTest.getFont().getFontData()[0];
		assertEquals("Arial", fontData.getName());
		assertEquals(12, fontData.getHeight());
		assertEquals(SWT.ITALIC, fontData.getStyle());		
	}
	public void testBorderVisible() throws Exception {
		CTabFolder folderToTest = createTestCTabFolder("CTabFolder { borderVisible: true}");
		assertEquals(true, folderToTest.getBorderVisible());
		assertEquals("true", engine.retrieveCSSProperty(folderToTest, "borderVisible", null));
		folderToTest.getShell().close();
		folderToTest = createTestCTabFolder("CTabFolder { borderVisible: false}");
		assertEquals(false, folderToTest.getBorderVisible());
		assertEquals("false", engine.retrieveCSSProperty(folderToTest, "borderVisible", null));
	}
	
	public void testSimple() throws Exception {