OmniaGM commented on code in PR #13204:
URL: https://github.com/apache/kafka/pull/13204#discussion_r1294456594


##########
tools/src/test/java/org/apache/kafka/tools/LeaderElectionCommandErrorTest.java:
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@@ -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.kafka.tools;
+
+import org.apache.kafka.common.errors.TimeoutException;
+import org.apache.kafka.server.common.AdminCommandFailedException;
+import org.junit.jupiter.api.Test;
+
+import java.time.Duration;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * For some error cases, we can save a little build time by avoiding the 
overhead for
+ * cluster creation and cleanup because the command is expected to fail 
immediately.
+ */
+public class LeaderElectionCommandErrorTest {
+    @Test
+    public void testTopicWithoutPartition() {
+        String out = ToolsTestUtils.captureStandardErr(() -> 
LeaderElectionCommand.main(
+                "--bootstrap-server", "nohost:9092",
+                "--election-type", "unclean",
+                "--topic", "some-topic"
+            ));
+        assertTrue(out.startsWith("Missing required option(s)"));
+        assertTrue(out.contains(" partition"));
+    }
+
+    @Test
+    public void testPartitionWithoutTopic() {
+        String out = ToolsTestUtils.captureStandardErr(() -> 
LeaderElectionCommand.main(
+                "--bootstrap-server", "nohost:9092",
+                "--election-type", "unclean",
+                "--all-topic-partitions",
+                "--partition", "0"
+        ));
+        String[] rows = out.split("\n");

Review Comment:
   Updated to use the suggested assertion. 



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