DATAREDIS-1150 - Add ReactiveRedisClusterCommands.

We now provide Redis Cluster commands (CLUSTER INFO, CLUSTER NODES, …) exposed through a reactive API.

Original Pull Request: #533

src/test/java/org/springframework/data/redis/connection/lettuce/LettuceReactiveClusterCommandsTests.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright 2016-2020 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.data.redis.connection.lettuce;
+
+import static org.assertj.core.api.Assertions.*;
+
+import reactor.test.StepVerifier;
+
+import java.nio.ByteBuffer;
+
+import org.junit.Test;
+
+import org.springframework.data.redis.connection.ReactiveClusterCommands;
+import org.springframework.data.redis.connection.RedisClusterNode;
+
+/**
+ * Integration tests for {@link LettuceReactiveRedisClusterConnection} via {@link ReactiveClusterCommands}.
+ * <p>
+ * Some assertions check against node 1 and node 4 (ports 7379/7382) as sometimes a failover happens and node 4 becomes
+ * the master node.
+ *
+ * @author Mark Paluch
+ */
+public class LettuceReactiveClusterCommandsTests extends LettuceReactiveClusterCommandsTestsBase {
+
+	@Test // DATAREDIS-1150
+	public void clusterGetNodesShouldReturnNodes() {
+
+		connection.clusterGetNodes().collectList() //
+				.as(StepVerifier::create) //
+				.consumeNextWith(actual -> {
+
+					assertThat(actual).hasSizeGreaterThan(3);
+				}).verifyComplete();
+	}
+
+	@Test // DATAREDIS-1150
+	public void clusterGetSlavesShouldReturnNodes() {
+
+		connection.clusterGetNodes().filter(RedisClusterNode::isMaster)
+				.filter(node -> (node.getPort() == 7379 || node.getPort() == 7382))
+				.flatMap(it -> connection.clusterGetSlaves(it)) //
+				.collectList() //
+				.as(StepVerifier::create) //
+				.consumeNextWith(actual -> {
+
+					assertThat(actual).hasSize(1);
+				}).verifyComplete();
+	}
+
+	@Test // DATAREDIS-1150
+	public void clusterGetMasterSlaveMapShouldReportTopology() {
+
+		connection.clusterGetMasterSlaveMap() //
+				.as(StepVerifier::create) //
+				.consumeNextWith(actual -> {
+
+					assertThat(actual).hasSize(3);
+				}).verifyComplete();
+	}
+
+	@Test // DATAREDIS-1150
+	public void clusterGetSlotForKeyShouldResolveSlot() {
+
+		connection.clusterGetSlotForKey(ByteBuffer.wrap("hello".getBytes())) //
+				.as(StepVerifier::create) //
+				.expectNext(866) //
+				.verifyComplete();
+	}
+
+	@Test // DATAREDIS-1150
+	public void clusterGetNodeForSlotShouldReportNode() {
+
+		connection.clusterGetNodeForSlot(866) //
+				.as(StepVerifier::create) //
+				.consumeNextWith(actual -> {
+
+					assertThat(actual.getPort()).isIn(7379, 7382);
+				}).verifyComplete();
+	}
+
+	@Test // DATAREDIS-1150
+	public void clusterGetNodeForKeyShouldReportNode() {
+
+		connection.clusterGetNodeForKey(ByteBuffer.wrap("hello".getBytes())) //
+				.as(StepVerifier::create) //
+				.consumeNextWith(actual -> {
+
+					assertThat(actual.getPort()).isIn(7379, 7382);
+				}).verifyComplete();
+	}
+
+	@Test // DATAREDIS-1150
+	public void clusterGetClusterInfoShouldReportState() {
+
+		connection.clusterGetClusterInfo() //
+				.as(StepVerifier::create) //
+				.consumeNextWith(actual -> {
+
+					assertThat(actual.getSlotsAssigned()).isEqualTo(16384);
+				}).verifyComplete();
+	}
+}