@Test
    public void testDeleteConsumerGroupOffsets() throws Exception {
        // Happy path

        final TopicPartition tp1 = new TopicPartition("foo", 0);
        final TopicPartition tp2 = new TopicPartition("bar", 0);
        final TopicPartition tp3 = new TopicPartition("foobar", 0);

        try (AdminClientUnitTestEnv env = new AdminClientUnitTestEnv(mockCluster(1, 0))) {
            env.kafkaClient().setNodeApiVersions(NodeApiVersions.create());

            env.kafkaClient().prepareResponse(
                prepareFindCoordinatorResponse(Errors.NONE, env.cluster().controller()));

            env.kafkaClient().prepareResponse(new OffsetDeleteResponse(
                new OffsetDeleteResponseData()
                    .setTopics(new OffsetDeleteResponseTopicCollection(Stream.of(
                        new OffsetDeleteResponseTopic()
                            .setName("foo")
                            .setPartitions(new OffsetDeleteResponsePartitionCollection(Collections.singletonList(
                                new OffsetDeleteResponsePartition()
                                    .setPartitionIndex(0)
                                    .setErrorCode(Errors.NONE.code())
                            ).iterator())),
                        new OffsetDeleteResponseTopic()
                            .setName("bar")
                            .setPartitions(new OffsetDeleteResponsePartitionCollection(Collections.singletonList(
                                new OffsetDeleteResponsePartition()
                                    .setPartitionIndex(0)
                                    .setErrorCode(Errors.GROUP_SUBSCRIBED_TO_TOPIC.code())
                            ).iterator()))
                    ).collect(Collectors.toList()).iterator()))
                )
            );

            final DeleteConsumerGroupOffsetsResult errorResult = env.adminClient().deleteConsumerGroupOffsets(
                GROUP_ID, Stream.of(tp1, tp2).collect(Collectors.toSet()));

            assertNull(errorResult.partitionResult(tp1).get());
            TestUtils.assertFutureError(errorResult.all(), GroupSubscribedToTopicException.class);
            TestUtils.assertFutureError(errorResult.partitionResult(tp2), GroupSubscribedToTopicException.class);
            assertThrows(IllegalArgumentException.class, () -> errorResult.partitionResult(tp3));
        }
    }
Test that we propagate exceptions encountered when fetching metadata.
clients/src/test/java/org/apache/kafka/clients/admin/KafkaAdminClientTest.java