@Test
    public void emptyBytesToConnect() {
        // This characterizes the messages with empty data when Json schemas is disabled
        Map<String, Boolean> props = Collections.singletonMap("schemas.enable", false);
        converter.configure(props, true);
        SchemaAndValue converted = converter.toConnectData(TOPIC, "".getBytes());
        assertEquals(SchemaAndValue.NULL, converted);
    }
When schemas are disabled, empty data should be decoded to an empty envelope.
This test verifies the case where `schemas.enable` configuration is set to false, and
{@link JsonConverter} converts empty bytes to {@link SchemaAndValue#NULL}.
connect/json/src/test/java/org/apache/kafka/connect/json/JsonConverterTest.java