@Test
void curieUtilWithUserSpecifiedMappingsOnly() {

  ImmutableMap<String, String> userDefinedCurieMap = ImmutableMap.of(
    "WIBBLE", "http://purl.obolibrary.org/obo/WIBBLE_",
    "FLUFFY", "http://purl.obolibrary.org/obo/FLUFFY_"
  );
  CurieUtil instance = CurieUtilBuilder.just(userDefinedCurieMap);
  assertEquals(userDefinedCurieMap, instance.getCurieMap());
  assertEquals(Optional.of("WIBBLE:0000001"), instance.getCurie("http://purl.obolibrary.org/obo/WIBBLE_0000001"));
  assertEquals(Optional.of("FLUFFY:0000001"), instance.getCurie("http://purl.obolibrary.org/obo/FLUFFY_0000001"));
}