zhuzhurk commented on a change in pull request #12181:
URL: https://github.com/apache/flink/pull/12181#discussion_r426350896
##########
File path:
flink-core/src/test/java/org/apache/flink/core/fs/SafetyNetCloseableRegistryTest.java
##########
@@ -27,18 +27,31 @@
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
import java.io.Closeable;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
+import static org.powermock.api.mockito.PowerMockito.doNothing;
+import static org.powermock.api.mockito.PowerMockito.doThrow;
+import static org.powermock.api.mockito.PowerMockito.whenNew;
+
/**
* Tests for the {@link SafetyNetCloseableRegistry}.
*/
+@RunWith(PowerMockRunner.class)
Review comment:
Mockito is not recommended for Flink tests.
An alternative is to introduce a new constructor
`SafetyNetCloseableRegistry(CloseableReaperThread)` and a test class which
overrides `CloseableReaperThread`.
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