@Test
void size() {

  QueryResult response = new QueryResult(
      schema,
      Arrays.asList(
          tupleValue(ImmutableMap.of("name", "John", "age", 20)),
          tupleValue(ImmutableMap.of("name", "Allen", "age", 30)),
          tupleValue(ImmutableMap.of("name", "Smith", "age", 40))
      ));
  assertEquals(3, response.size());
}