@Test
void convertUnsupportedType()
{

    Throwable exception = assertThrows(ConversionException.class,
        () -> this.converterManager.convert(DefaultConverterManagerTest.class, "#ffffff"));
    assertEquals("Failed to find a Converter to convert from [java.lang.String] to "
        + "[org.xwiki.properties.internal.DefaultConverterManagerTest]", exception.getMessage());
}