@Test
public void convert() throws Exception {

    InstantConverter conv = new InstantConverter();
    Instant value = conv.convert("2007-12-03T10:15:30.00Z", context);
    assertThat(Instant.parse("2007-12-03T10:15:30.00Z")).isEqualTo(value);
    value = conv.convert("foo", context);
    assertThat(value).isNull();
}