[ISSUE apache#5092] unit test added for EtcdCustomService (apache#5107)

Author: denizOgut

eventmesh-meta/eventmesh-meta-etcd/src/test/java/org/apache/eventmesh/registry/etcd/service/EtcdCustomServiceTest.java

@@ -0,0 +1,122 @@
+/*
+ * 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.eventmesh.registry.etcd.service;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.when;
+
+import org.apache.eventmesh.api.meta.bo.EventMeshAppSubTopicInfo;
+import org.apache.eventmesh.api.meta.bo.EventMeshServicePubTopicInfo;
+import org.apache.eventmesh.common.utils.JsonUtils;
+import org.apache.eventmesh.meta.etcd.service.EtcdCustomService;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import io.etcd.jetcd.ByteSequence;
+import io.etcd.jetcd.Client;
+import io.etcd.jetcd.KV;
+import io.etcd.jetcd.KeyValue;
+import io.etcd.jetcd.kv.GetResponse;
+import io.etcd.jetcd.options.GetOption;
+
+@ExtendWith(MockitoExtension.class)
+public class EtcdCustomServiceTest {
+
+    @Mock
+    private Client etcdClient;
+
+    @Mock
+    private KV kvClient;
+
+    @Mock
+    private KeyValue keyValue;
+
+    @Mock
+    private GetResponse getResponse;
+
+    @Mock
+    private CompletableFuture<GetResponse> futureResponse;
+
+    @InjectMocks
+    private EtcdCustomService etcdCustomService;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+        when(etcdClient.getKVClient()).thenReturn(kvClient);
+    }
+
+    @Test
+    public void testFindEventMeshServicePubTopicInfos() throws Exception {
+
+        EventMeshServicePubTopicInfo mockInfo = new EventMeshServicePubTopicInfo();
+        mockInfo.setService("testService");
+        mockInfo.setTopics(Collections.unmodifiableSet(new HashSet<>(Arrays.asList("topic1", "topic2"))));
+
+        String mockValue = JsonUtils.toJSONString(mockInfo);
+        ByteSequence mockByteSequence = ByteSequence.from(mockValue, StandardCharsets.UTF_8);
+
+        when(keyValue.getValue()).thenReturn(mockByteSequence);
+        when(getResponse.getKvs()).thenReturn(Arrays.asList(keyValue));
+        when(futureResponse.get()).thenReturn(getResponse);
+        when(kvClient.get(any(ByteSequence.class), any(GetOption.class))).thenReturn(futureResponse);
+
+        List<EventMeshServicePubTopicInfo> result = etcdCustomService.findEventMeshServicePubTopicInfos();
+        assertNotNull(result);
+        assertEquals(1, result.size());
+        EventMeshServicePubTopicInfo resultInfo = result.get(0);
+        assertEquals("testService", resultInfo.getService());
+        assertEquals(new HashSet<>(Arrays.asList("topic1", "topic2")), resultInfo.getTopics());
+    }
+
+
+    @Test
+    public void testFindEventMeshAppSubTopicInfoByGroup() throws Exception {
+
+        String group = "testGroup";
+        EventMeshAppSubTopicInfo mockInfo = new EventMeshAppSubTopicInfo();
+
+        String mockValue = JsonUtils.toJSONString(mockInfo);
+        ByteSequence mockByteSequence = ByteSequence.from(mockValue, StandardCharsets.UTF_8);
+
+        when(keyValue.getValue()).thenReturn(mockByteSequence);
+        when(kvClient.get(any(ByteSequence.class), any(GetOption.class))).thenReturn(futureResponse);
+        when(futureResponse.get()).thenReturn(getResponse);
+        when(getResponse.getKvs()).thenReturn(Collections.singletonList(keyValue));
+
+        EventMeshAppSubTopicInfo result = etcdCustomService.findEventMeshAppSubTopicInfoByGroup(group);
+
+        assertNotNull(result);
+    }
+
+}