fix: test

Author: Kris20030907

tieredstore/src/test/java/org/apache/rocketmq/tieredstore/TieredMessageStoreTest.java

@@ -238,22 +238,9 @@ public void testGetMinOffsetInQueue() {
         Mockito.when(defaultStore.getMinOffsetInQueue(anyString(), anyInt())).thenReturn(100L);
         Assert.assertEquals(100L, currentStore.getMinOffsetInQueue(mq.getTopic(), mq.getQueueId()));
 
+        Mockito.when(defaultStore.getMinOffsetInQueue(anyString(), anyInt())).thenReturn(-1L);
         Assert.assertEquals(flatFile.getConsumeQueueMinOffset(),
             currentStore.getMinOffsetInQueue(mq.getTopic(), mq.getQueueId()));
-
-        FlatFileStore mockFlatFileStore = Mockito.mock(FlatFileStore.class);
-        FlatMessageFile mockFlatFile = Mockito.mock(FlatMessageFile.class);
-        Mockito.when(mockFlatFileStore.getFlatFile(any(MessageQueue.class))).thenReturn(mockFlatFile);
-        Mockito.when(mockFlatFile.getConsumeQueueMinOffset()).thenReturn(10L);
-        Mockito.when(defaultStore.getMinOffsetInQueue(anyString(), anyInt())).thenReturn(-1L);
-        try {
-            Field field = currentStore.getClass().getDeclaredField("flatFileStore");
-            field.setAccessible(true);
-            field.set(currentStore, mockFlatFileStore);
-        } catch (NoSuchFieldException | IllegalAccessException e) {
-            Assert.fail(e.getClass().getCanonicalName() + ": " + e.getMessage());
-        }
-        Assert.assertEquals(10L, currentStore.getMinOffsetInQueue(mq.getTopic(), mq.getQueueId()));
     }
 
     @Test