showuon commented on a change in pull request #11837:
URL: https://github.com/apache/kafka/pull/11837#discussion_r826766945



##########
File path: 
clients/src/test/java/org/apache/kafka/common/config/ConfigDefTest.java
##########
@@ -722,4 +724,35 @@ public void testNiceTimeUnits() {
         assertEquals(" (365 days)", 
ConfigDef.niceTimeUnits(Duration.ofDays(365).toMillis()));
     }
 
+    @Test
+    public void testThrowsExceptionWhenListSizeExceedsLimit() {
+        assertThrows(ConfigException.class, () -> new ConfigDef().define("lst",
+                                                                         
Type.LIST,
+                                                                         
asList("a", "b"),
+                                                                         
ListSize.atMostOfSize(1),
+                                                                         
Importance.HIGH,
+                                                                         "lst 
doc"));
+    }
+
+    @Test
+    public void testNoExceptionIsThrownWhenListSizeEqualsTheLimit() {
+        final List<String> lst = asList("a", "b", "c");
+        new ConfigDef().define("lst",

Review comment:
       We can use `assertDoesNotThrow` here and below.




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