brandboat commented on code in PR #20385:
URL: https://github.com/apache/kafka/pull/20385#discussion_r2303421157


##########
tools/src/test/java/org/apache/kafka/tools/ConsumerPerformanceTest.java:
##########
@@ -145,21 +185,61 @@ public void testClientIdOverride() throws IOException {
         String[] args = new String[]{
             "--bootstrap-server", "localhost:9092",
             "--topic", "test",
-            "--messages", "10",
+            "--num-records", "10",
+            "--command-config", tempFile.getAbsolutePath()
+        };
+
+        ConsumerPerformance.ConsumerPerfOptions config = new 
ConsumerPerformance.ConsumerPerfOptions(args);
+
+        assertEquals("consumer-1", 
config.props().getProperty(ConsumerConfig.CLIENT_ID_CONFIG));
+        Files.deleteIfExists(configPath);
+    }
+
+    @Test
+    public void testConsumerConfigDeprecated() throws IOException {
+        Path configPath = tempDir.resolve("test_consumer_config.conf");
+        Files.deleteIfExists(configPath);
+        File tempFile = Files.createFile(configPath).toFile();
+        try (PrintWriter output = new 
PrintWriter(Files.newOutputStream(tempFile.toPath()))) {
+            output.println("client.id=consumer-1");
+            output.flush();
+        }
+
+        String[] args = new String[]{
+            "--bootstrap-server", "localhost:9092",
+            "--topic", "test",
+            "--num-records", "10",
             "--consumer.config", tempFile.getAbsolutePath()
         };
 
         ConsumerPerformance.ConsumerPerfOptions config = new 
ConsumerPerformance.ConsumerPerfOptions(args);
 
         assertEquals("consumer-1", 
config.props().getProperty(ConsumerConfig.CLIENT_ID_CONFIG));
+        Files.deleteIfExists(configPath);
+    }
+
+    @Test
+    public void testCommandConfigWithConsumerConfigPresent() throws 
IOException {

Review Comment:
   nit:
   ```suggestion
       public void testCommandConfigWithConsumerConfigPresent() {
   ```



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