adoroszlai commented on code in PR #6508:
URL: https://github.com/apache/ozone/pull/6508#discussion_r1568234171
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hadoop-hdds/common/src/test/java/org/apache/hadoop/hdds/fs/TestCachingSpaceUsageSource.java:
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@@ -142,6 +143,28 @@ public void savesValueOnShutdown() {
verify(executor).shutdown();
}
+ @Test
+ public void testDecrementDoesNotGoNegative() {
+ CachingSpaceUsageSource subject;
+ SpaceUsageCheckParams params;
+ AtomicLong cachedValue;
+ cachedValue = new AtomicLong(50);
+ params = paramsBuilder(cachedValue)
+ .withRefresh(Duration.ZERO)
+ .build();
+ subject = new CachingSpaceUsageSource(params);
+ // Try to decrement more than the current value
+ subject.decrementUsedSpace(100);
+
+ // Check that the value has not gone negative
+ assertTrue(subject.getUsedSpace() >= 0,
+ "Cached used space should not be negative");
+
+ // Check that it has retained the previous value
+ assertEquals(50, subject.getUsedSpace(),
+ "Cached used space should remain at the initial value");
Review Comment:
Looks like this assertion needs to be updated:
```
Error: TestCachingSpaceUsageSource.testDecrementDoesNotGoNegative Time
elapsed: 0.028 s <<< FAILURE!
AssertionFailedError: Cached used space should remain at the initial value
==> expected: <50> but was: <0>
```
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