reswqa commented on code in PR #19840:
URL: https://github.com/apache/flink/pull/19840#discussion_r901274198


##########
flink-runtime/src/test/java/org/apache/flink/runtime/resourcemanager/slotmanager/DeclarativeSlotManagerTest.java:
##########
@@ -1449,20 +1449,70 @@ public void testProcessResourceRequirementsWithDelay() 
throws Exception {
             final JobID jobId = new JobID();
 
             
slotManager.processResourceRequirements(createResourceRequirements(jobId, 1));
-            Assertions.assertEquals(0, allocatedResourceCounter.get());
-            Assertions.assertEquals(
-                    1, 
scheduledExecutor.getActiveNonPeriodicScheduledTask().size());
+            Assertions.assertThat(allocatedResourceCounter.get()).isEqualTo(0);
+            
Assertions.assertThat(scheduledExecutor.getActiveNonPeriodicScheduledTask().size())
+                    .isEqualTo(1);
             final ScheduledFuture<?> future =
                     
scheduledExecutor.getActiveNonPeriodicScheduledTask().iterator().next();
-            Assertions.assertEquals(delay.toMillis(), 
future.getDelay(TimeUnit.MILLISECONDS));
+            Assertions.assertThat(future.getDelay(TimeUnit.MILLISECONDS))
+                    .isEqualTo(delay.toMillis());
 
             // the second request is skipped
             
slotManager.processResourceRequirements(createResourceRequirements(jobId, 1));
-            Assertions.assertEquals(
-                    1, 
scheduledExecutor.getActiveNonPeriodicScheduledTask().size());
+            
Assertions.assertThat(scheduledExecutor.getActiveNonPeriodicScheduledTask().size())
+                    .isEqualTo(1);
 
             scheduledExecutor.triggerNonPeriodicScheduledTask();
-            Assertions.assertEquals(1, allocatedResourceCounter.get());
+            Assertions.assertThat(allocatedResourceCounter.get()).isEqualTo(1);
+        }
+    }
+
+    @Test
+    public void testProcessResourceRequirementsWithLongDelay() throws 
Exception {
+        final ResourceTracker resourceTracker = new DefaultResourceTracker();
+        final AtomicInteger allocatedResourceCounter = new AtomicInteger(0);
+        final ManuallyTriggeredScheduledExecutor scheduledExecutor =
+                new ManuallyTriggeredScheduledExecutor();
+        final Duration longDelay = Duration.ofSeconds(1);
+        final Duration delay = Duration.ofMillis(500);
+        try (final DeclarativeSlotManager slotManager =
+                createDeclarativeSlotManagerBuilder(scheduledExecutor)
+                        .setResourceTracker(resourceTracker)
+                        .setRequirementCheckDelay(delay)
+                        .setRequirementCheckLongDelay(longDelay)
+                        .buildAndStartWithDirectExec(
+                                ResourceManagerId.generate(),
+                                new TestingResourceActionsBuilder()
+                                        .setAllocateResourceConsumer(
+                                                workerResourceSpec ->
+                                                        
allocatedResourceCounter.getAndIncrement())
+                                        .build())) {
+
+            final JobID jobId = new JobID();
+
+            slotManager.enlargeRequirementsCheckDelayOnce();
+
+            
slotManager.processResourceRequirements(createResourceRequirements(jobId, 1));
+
+            Assertions.assertThat(allocatedResourceCounter.get()).isEqualTo(0);
+            
Assertions.assertThat(scheduledExecutor.getActiveNonPeriodicScheduledTask().size())

Review Comment:
   ```suggestion
              
Assertions.assertThat(scheduledExecutor.getActiveNonPeriodicScheduledTask()).hasSize(1);
   ```



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