@Test
public void testNullDefaultWriterRoleAssignment() {

    ContainerInfo.Builder containerInfoBuilder = ContainerInfo.newBuilder();
    converter.appendS3WriterRole(containerInfoBuilder, JobGenerator.oneBatchJob(), JobGenerator.oneBatchTask());
    assertThat(containerInfoBuilder.getPassthroughAttributesMap()).doesNotContainKey(S3_WRITER_ROLE);
}