@Test
	public void verifyStringErrorMessages() {
		Context c = new Context();
		IVPError e1 = c.addString("key1", "Hello, world!");
		IVPError e2 = c.addString("key1", "Hello, world 2!");
		assertTrue(e2.getErrorMessage().equals(Messages.getString("Context.keyExists")));
		assertTrue(e1 == null);
	}