@Test
public void shouldThrowExceptionForInvalidString() {

	try {
		converter.convert("not a boolean!", boolean.class, bundle);
		Assert.assertTrue(false);
	} catch (ConversionError e) {
		assertThat(e.getMessage(),
				is(equalTo("NOT A BOOLEAN! is not a valid boolean. Please use true/false, yes/no, y/n or on/off")));
	}
}