jsancio commented on code in PR #18391:
URL: https://github.com/apache/kafka/pull/18391#discussion_r2078362054


##########
tools/src/test/java/org/apache/kafka/tools/ProducerPerformanceTest.java:
##########
@@ -104,6 +104,20 @@ public void testReadProps() throws Exception {
         Utils.delete(producerConfig);
     }
 
+    @Test
+    public void testReadPayloadFileWithAlternateDelimiter() throws Exception {
+        File payloadFile = createTempFile("Hello~~Kafka");
+        String payloadFilePath = payloadFile.getAbsolutePath();
+        String payloadDelimiter = "~~";
+
+        List<byte[]> payloadByteList = 
ProducerPerformance.readPayloadFile(payloadFilePath, payloadDelimiter);
+
+        assertEquals(2, payloadByteList.size());
+        assertEquals("Hello", new String(payloadByteList.get(0)));
+        assertEquals("Kafka", new String(payloadByteList.get(1)));
+        Utils.delete(payloadFile);

Review Comment:
   Lets make sure the test always deletes the file. You can use `try ... 
finally ...` to achieve this.



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