snuyanzin commented on code in PR #19667:
URL: https://github.com/apache/flink/pull/19667#discussion_r868869212
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flink-core/src/test/java/org/apache/flink/api/java/typeutils/runtime/PojoSerializerTest.java:
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@@ -48,10 +47,7 @@
import java.util.Objects;
import java.util.Random;
-import static org.hamcrest.CoreMatchers.instanceOf;
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import static org.assertj.core.api.Assertions.assertThat;
/** A test for the {@link PojoSerializer}. */
public class PojoSerializerTest extends
SerializerTestBase<PojoSerializerTest.TestUserClass> {
Review Comment:
```suggestion
class PojoSerializerTest extends
SerializerTestBase<PojoSerializerTest.TestUserClass> {
```
?
\+ there are 3-4 more tests within this class which are public and could be
made as package-private (GitHub does not allow to comment on them since they
were not touched)
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