| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.component.aws.ddbstream; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.amazonaws.services.dynamodbv2.model.SequenceNumberRange; |
| import com.amazonaws.services.dynamodbv2.model.Shard; |
| import org.junit.Test; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.assertThat; |
| |
| public class ShardListTest { |
| |
| @Test |
| public void nextReturnsShardWithParent() throws Exception { |
| Shard first = new Shard() |
| .withShardId("first_shard") |
| .withParentShardId("other_shard_id"); |
| Shard second = new Shard() |
| .withParentShardId("first_shard") |
| .withShardId("second_shard"); |
| |
| ShardList shards = new ShardList(); |
| shards.add(first); |
| shards.add(second); |
| |
| assertThat(shards.nextAfter(first), is(second)); |
| } |
| |
| @Test |
| public void nextWithNullReturnsFirstKnownShard() throws Exception { |
| Shard first = new Shard() |
| .withShardId("first_shard"); |
| Shard second = new Shard() |
| .withParentShardId("first_shard") |
| .withShardId("second_shard"); |
| |
| ShardList shards = new ShardList(); |
| shards.add(first); |
| shards.add(second); |
| |
| assertThat(shards.nextAfter(first), is(second)); |
| } |
| |
| @Test |
| public void reAddingEntriesMaintainsOrder() throws Exception { |
| Shard first = new Shard() |
| .withShardId("first_shard"); |
| Shard second = new Shard() |
| .withParentShardId("first_shard") |
| .withShardId("second_shard"); |
| |
| ShardList shards = new ShardList(); |
| shards.add(first); |
| shards.add(second); |
| |
| assertThat(shards.nextAfter(first), is(second)); |
| |
| Shard second2 = new Shard() |
| .withParentShardId("first_shard") |
| .withShardId("second_shard"); |
| Shard third = new Shard() |
| .withParentShardId("second_shard") |
| .withShardId("third_shard"); |
| shards.add(second2); |
| shards.add(third); |
| |
| assertThat(shards.nextAfter(first), is(second)); |
| assertThat(shards.nextAfter(second), is(third)); |
| } |
| |
| @Test |
| public void firstShardGetsTheFirstWithoutAParent() throws Exception { |
| ShardList shards = new ShardList(); |
| shards.addAll(createShards(null, "a", "b", "c", "d")); |
| |
| assertThat(shards.first().getShardId(), is("a")); |
| } |
| |
| @Test |
| public void firstShardGetsTheFirstWithAnUnknownParent() throws Exception { |
| ShardList shards = new ShardList(); |
| shards.addAll(createShards("a", "b", "c", "d")); |
| |
| assertThat(shards.first().getShardId(), is("b")); |
| } |
| |
| @Test |
| public void lastShardGetsTheShardWithNoChildren() throws Exception { |
| ShardList shards = new ShardList(); |
| shards.addAll(createShards("a", "b", "c", "d")); |
| |
| assertThat(shards.last().getShardId(), is("d")); |
| } |
| |
| @Test |
| public void removingShards() throws Exception { |
| ShardList shards = new ShardList(); |
| shards.addAll(createShards(null, "a", "b", "c", "d")); |
| Shard removeBefore = new Shard().withShardId("c").withParentShardId("b"); |
| shards.removeOlderThan(removeBefore); |
| assertThat(shards.first().getShardId(), is("c")); |
| } |
| |
| static List<Shard> createShardsWithSequenceNumbers(String initialParent, String... shardIdsAndSeqNos) { |
| String previous = initialParent; |
| List<Shard> result = new ArrayList<>(); |
| for (int i = 0; i < shardIdsAndSeqNos.length; i += 3) { |
| String id = shardIdsAndSeqNos[i]; |
| String seqStart = shardIdsAndSeqNos[i + 1]; |
| String seqEnd = shardIdsAndSeqNos[i + 2]; |
| result.add(new Shard() |
| .withShardId(id) |
| .withParentShardId(previous) |
| .withSequenceNumberRange(new SequenceNumberRange() |
| .withStartingSequenceNumber(seqStart) |
| .withEndingSequenceNumber(seqEnd) |
| ) |
| ); |
| previous = id; |
| } |
| return result; |
| } |
| |
| static List<Shard> createShards(String initialParent, String... shardIds) { |
| String previous = initialParent; |
| List<Shard> result = new ArrayList<>(); |
| for (String s : shardIds) { |
| result.add(new Shard().withShardId(s).withParentShardId(previous)); |
| previous = s; |
| } |
| return result; |
| } |
| } |