steveloughran commented on code in PR #7955:
URL: https://github.com/apache/hadoop/pull/7955#discussion_r2376168925


##########
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/TestGenericTestUtils.java:
##########
@@ -35,31 +37,39 @@ public class TestGenericTestUtils extends GenericTestUtils {
 
   @Test
   public void testAssertExceptionContainsNullEx() throws Throwable {
+    boolean assertTriggered = false;
     try {
       assertExceptionContains("", null);
     } catch (AssertionError e) {
+      assertTriggered = true;
       if (!e.toString().contains(E_NULL_THROWABLE)) {
         throw e;
       }
     }
+    assertTrue(assertTriggered);
   }
 
   @Test
   public void testAssertExceptionContainsNullString() throws Throwable {
+    boolean assertTriggered = false;
     try {
       assertExceptionContains("", new BrokenException());
     } catch (AssertionError e) {
+      assertTriggered = true;
       if (!e.toString().contains(E_NULL_THROWABLE_STRING)) {
         throw e;
       }
     }
+    assertTrue(assertTriggered);
   }
 
   @Test
   public void testAssertExceptionContainsWrongText() throws Throwable {
+    boolean assertTriggered = false;
     try {
       assertExceptionContains("Expected", new Exception("(actual)"));
     } catch (AssertionError e) {
+      assertTriggered = true;
       String s = e.toString();
       if (!s.contains(E_UNEXPECTED_EXCEPTION)

Review Comment:
   again, use intercept, but here 
   
   ```
   AssertionError e = intercept(AssertionError.class, "", () -> 
     assertExceptionContains("Expected", new Exception("(actual)")));
   // checks from L32 onwards
   String s = e.toString();
         if (!s.contains(E_UNEXPECTED_EXCEPTION) ...
   



##########
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/TestGenericTestUtils.java:
##########
@@ -35,31 +37,39 @@ public class TestGenericTestUtils extends GenericTestUtils {
 
   @Test
   public void testAssertExceptionContainsNullEx() throws Throwable {
+    boolean assertTriggered = false;

Review Comment:
   use LambdaTestUtils.intercept here.
   
   ```
   intercept(AssertionError.class, E_NULL_THROWABLE, () -> 
assertExceptionContains("", null));
   ```
   same below.



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