RyanSkraba commented on a change in pull request #18848:
URL: https://github.com/apache/flink/pull/18848#discussion_r828226789
##########
File path:
flink-rpc/flink-rpc-akka/src/test/java/org/apache/flink/runtime/concurrent/akka/ClassLoadingUtilsTest.java
##########
@@ -48,14 +46,14 @@ public void testRunnableWithContextClassLoader() throws
Exception {
ClassLoadingUtils.withContextClassLoader(runnable,
TEST_CLASS_LOADER);
// the runnable should only be wrapped, not run immediately
- assertThat(contextClassLoader.isDone(), is(false));
+ assertThat(contextClassLoader.isDone()).isFalse();
Review comment:
```suggestion
assertThat(contextClassLoader).isNotDone();
```
There are some nice assertions for CompletableFuture.
##########
File path:
flink-rpc/flink-rpc-akka/src/test/java/org/apache/flink/runtime/concurrent/akka/ClassLoadingUtilsTest.java
##########
@@ -48,14 +46,14 @@ public void testRunnableWithContextClassLoader() throws
Exception {
ClassLoadingUtils.withContextClassLoader(runnable,
TEST_CLASS_LOADER);
// the runnable should only be wrapped, not run immediately
- assertThat(contextClassLoader.isDone(), is(false));
+ assertThat(contextClassLoader.isDone()).isFalse();
wrappedRunnable.run();
- assertThat(contextClassLoader.get(), is(TEST_CLASS_LOADER));
+ assertThat(contextClassLoader.get()).isSameAs(TEST_CLASS_LOADER);
Review comment:
```suggestion
assertThat(contextClassLoader)
.succeedsWithin(Duration.ofSeconds(1))
.isSameAs(TEST_CLASS_LOADER);
```
Likewise, we could specify a timeout for the Future, which is a good
practice (even if we want to specify "forever", which is what the original
does).
##########
File path:
flink-rpc/flink-rpc-akka/src/test/java/org/apache/flink/runtime/rpc/akka/AkkaRpcActorHandshakeTest.java
##########
@@ -23,36 +23,32 @@
import org.apache.flink.runtime.rpc.RpcUtils;
import org.apache.flink.runtime.rpc.exceptions.HandshakeException;
import org.apache.flink.util.ExceptionUtils;
-import org.apache.flink.util.TestLogger;
import org.apache.flink.util.concurrent.FutureUtils;
import akka.actor.ActorSystem;
-import org.junit.AfterClass;
-import org.junit.BeforeClass;
-import org.junit.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import java.util.Collection;
import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
-import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.instanceOf;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.fail;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
/** Tests for the handshake between rpc endpoints. */
-public class AkkaRpcActorHandshakeTest extends TestLogger {
+class AkkaRpcActorHandshakeTest {
private static final Time timeout = Time.seconds(10L);
private static AkkaRpcService akkaRpcService1;
private static AkkaRpcService akkaRpcService2;
private static WrongVersionAkkaRpcService wrongVersionAkkaRpcService;
- @BeforeClass
- public static void setupClass() {
+ @BeforeAll
+ private static void setupClass() {
Review comment:
?? This works, but the [JUnit5
docs](https://junit.org/junit5/docs/current/api/org.junit.jupiter.api/org/junit/jupiter/api/BeforeAll.html)
suggests that it shouldn't : `@BeforeAll methods must have a void return type,
must not be private, and must be static by default. `
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