@Test
public void testRef() {
        GraphQLSchema schema = GraphQLSchema.newSchema()
                .query(newObject()
                        .name("query")
                        .field(echo -> echo
                                .name("echo")
                                .type(Scalars.GraphQLString)))
                .additionalDirective(newDirective()
                        .name("cache")
                        .argument(enabled -> enabled
                                .name("enabled")
                                .type(Scalars.GraphQLBoolean))
                        .build())
                .withSchemaAppliedDirectives(GraphQLAppliedDirective.newDirective()
                        .name("cache")
                        .argument(enabled -> enabled
                                .name("enabled")
                                .type(GraphQLTypeReference.typeRef(Scalars.GraphQLBoolean.getName()))
                                .valueLiteral(new BooleanValue(true)))
                        .build())
                .build();
        assertFalse(schema.getSchemaAppliedDirective("cache").getArgument("enabled").getType() instanceof GraphQLTypeReference);
}