[ISSUE #4995] unit tests for TraceUtils.java (#5046)

Author: Abhichede

eventmesh-runtime/src/test/java/org/apache/eventmesh/runtime/util/TraceUtilsTest.java

@@ -0,0 +1,90 @@
+/*
+ * 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.runtime.util;
+
+import org.apache.eventmesh.runtime.boot.EventMeshServer;
+import org.apache.eventmesh.runtime.mock.MockCloudEvent;
+import org.apache.eventmesh.runtime.trace.Trace;
+
+import java.util.Map;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+
+import io.cloudevents.SpecVersion;
+import io.opentelemetry.api.trace.Span;
+
+public class TraceUtilsTest {
+    @Test
+    public void testShouldPrepareClientSpan() throws Exception {
+        Map<String, Object> cloudEventExtensionMap = EventMeshUtil.getCloudEventExtensionMap(SpecVersion.V1.toString(), new MockCloudEvent());
+        try (MockedStatic<EventMeshServer> dummyStatic = Mockito.mockStatic(EventMeshServer.class)) {
+            Trace trace = Trace.getInstance("zipkin", true);
+            trace.init();
+            dummyStatic.when(EventMeshServer::getTrace).thenReturn(trace);
+            Span testClientSpan = TraceUtils.prepareClientSpan(
+                cloudEventExtensionMap,
+                "test client span",
+                false
+            );
+            Assertions.assertNotNull(testClientSpan);
+        }
+    }
+
+    @Test
+    public void testShouldPrepareServerSpan() throws Exception {
+        Map<String, Object> cloudEventExtensionMap = EventMeshUtil.getCloudEventExtensionMap(SpecVersion.V1.toString(), new MockCloudEvent());
+        try (MockedStatic<EventMeshServer> dummyStatic = Mockito.mockStatic(EventMeshServer.class)) {
+            Trace trace = Trace.getInstance("zipkin", true);
+            trace.init();
+            dummyStatic.when(EventMeshServer::getTrace).thenReturn(trace);
+            TraceUtils.prepareClientSpan(
+                cloudEventExtensionMap,
+                "test client span",
+                false
+            );
+            Span testServerSpan = TraceUtils.prepareServerSpan(
+                cloudEventExtensionMap,
+                "test server span",
+                false
+            );
+            Assertions.assertNotNull(testServerSpan);
+        }
+    }
+
+    @Test
+    public void testShouldFinishSpan() throws Exception {
+        MockCloudEvent cloudEvent = new MockCloudEvent();
+        Map<String, Object> cloudEventExtensionMap = EventMeshUtil.getCloudEventExtensionMap(SpecVersion.V1.toString(), cloudEvent);
+        try (MockedStatic<EventMeshServer> dummyStatic = Mockito.mockStatic(EventMeshServer.class)) {
+            Trace trace = Trace.getInstance("zipkin", true);
+            trace.init();
+            dummyStatic.when(EventMeshServer::getTrace).thenReturn(trace);
+            Span testClientSpan = TraceUtils.prepareClientSpan(
+                cloudEventExtensionMap,
+                "test client span",
+                false
+            );
+
+            TraceUtils.finishSpan(testClientSpan, cloudEvent);
+            Assertions.assertFalse(testClientSpan.isRecording());
+        }
+    }
+}