@Test(expected = InvalidPiiAnnotationException.class)
public void addPiiToExistingFieldFails() throws Exception {

  Schema newSchema = SchemaBuilder
      .record("r")
      .fields()
      .name("f")
      .prop("sensitivity", "PII")
      .type(SchemaBuilder.builder().stringType())
      .noDefault()
      .endRecord();
  Schema currentSchema = SchemaBuilder
      .record("r")
      .fields()
      .name("f")
      .type(SchemaBuilder.builder().stringType())
      .noDefault()
      .endRecord();
  PiiSchemaEvolutionValidator.validate(newSchema, Optional.of(currentSchema));
}