Tests for shared subscriptions

Resolves https://github.com/spring-projects-experimental/spring-pulsar/issues/305

spring-pulsar/src/test/java/org/springframework/pulsar/core/SharedSubscriptionConsumerTests.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2023 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.pulsar.core;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.Schema;
+import org.apache.pulsar.client.api.SubscriptionType;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.pulsar.listener.DefaultPulsarMessageListenerContainer;
+import org.springframework.pulsar.listener.PulsarContainerProperties;
+import org.springframework.pulsar.listener.PulsarRecordMessageListener;
+import org.springframework.pulsar.test.support.PulsarTestContainerSupport;
+
+/**
+ * Tests for shared subscription types in Pulsar consumer.
+ *
+ * @author Soby Chacko
+ */
+public class SharedSubscriptionConsumerTests implements PulsarTestContainerSupport {
+
+	@Test
+	void sharedSubscriptionRoundRobinBasicScenario() throws Exception {
+
+		Map<String, Object> config = Map.of("topicNames",
+				Collections.singleton("shared-subscription-single-msg-test-topic"), "subscriptionName",
+				"shared-subscription-single-msg-test-sub");
+
+		PulsarClient pulsarClient = PulsarClient.builder().serviceUrl(PulsarTestContainerSupport.getPulsarBrokerUrl())
+				.build();
+		DefaultPulsarConsumerFactory<String> pulsarConsumerFactory = new DefaultPulsarConsumerFactory<>(pulsarClient,
+				config);
+
+		CountDownLatch latch1 = new CountDownLatch(1);
+		CountDownLatch latch2 = new CountDownLatch(1);
+		CountDownLatch latch3 = new CountDownLatch(1);
+
+		PulsarContainerProperties pulsarContainerProperties1 = pulsarContainerProperties(latch1, "hello john doe",
+				SubscriptionType.Shared);
+		DefaultPulsarMessageListenerContainer<String> container1 = new DefaultPulsarMessageListenerContainer<>(
+				pulsarConsumerFactory, pulsarContainerProperties1);
+		container1.start();
+
+		PulsarContainerProperties pulsarContainerProperties2 = pulsarContainerProperties(latch2, "hello alice doe",
+				SubscriptionType.Shared);
+		DefaultPulsarMessageListenerContainer<String> container2 = new DefaultPulsarMessageListenerContainer<>(
+				pulsarConsumerFactory, pulsarContainerProperties2);
+		container2.start();
+
+		PulsarContainerProperties pulsarContainerProperties3 = pulsarContainerProperties(latch3, "hello buzz doe",
+				SubscriptionType.Shared);
+		DefaultPulsarMessageListenerContainer<String> container3 = new DefaultPulsarMessageListenerContainer<>(
+				pulsarConsumerFactory, pulsarContainerProperties3);
+		container3.start();
+
+		Map<String, Object> prodConfig = Map.of("topicName", "shared-subscription-single-msg-test-topic");
+		DefaultPulsarProducerFactory<String> pulsarProducerFactory = new DefaultPulsarProducerFactory<>(pulsarClient,
+				prodConfig);
+		PulsarTemplate<String> pulsarTemplate = new PulsarTemplate<>(pulsarProducerFactory);
+
+		pulsarTemplate.newMessage("hello john doe").sendAsync();
+		pulsarTemplate.newMessage("hello alice doe").sendAsync();
+		pulsarTemplate.newMessage("hello buzz doe").sendAsync();
+
+		boolean await1 = latch1.await(10, TimeUnit.SECONDS);
+		boolean await2 = latch2.await(10, TimeUnit.SECONDS);
+		boolean await3 = latch3.await(10, TimeUnit.SECONDS);
+
+		assertThat(await1).isTrue();
+		assertThat(await2).isTrue();
+		assertThat(await3).isTrue();
+
+		container1.stop();
+		container2.stop();
+		container3.stop();
+
+		pulsarClient.close();
+	}
+
+	private PulsarContainerProperties pulsarContainerProperties(CountDownLatch latch, String message,
+			SubscriptionType subscriptionType) {
+		PulsarContainerProperties pulsarContainerProperties = new PulsarContainerProperties();
+		pulsarContainerProperties.setMessageListener((PulsarRecordMessageListener<?>) (consumer, msg) -> {
+			assertThat(msg.getValue()).isEqualTo(message);
+			latch.countDown();
+		});
+		pulsarContainerProperties.setSubscriptionType(subscriptionType);
+		pulsarContainerProperties.setSchema(Schema.STRING);
+		return pulsarContainerProperties;
+	}
+
+}