    @Test
    public void testStreamTupleSerializerWithPrimitive() {

        TypeInformation<String> typeInfo = TypeInformation.of(new TypeHint<String>() {});
        StreamSchema<String> schema = new StreamSchema<>(typeInfo, "words");
        assertEquals(String.class, schema.getTypeInfo().getTypeClass());
        TypeInformation<Tuple2<String, String>> tuple2TypeInformation = Types.TUPLE(TypeInformation.of(String.class), schema.getTypeInfo());
        assertEquals("Java Tuple2<String, String>", tuple2TypeInformation.toString());
    }