zentol commented on code in PR #22935:
URL: https://github.com/apache/flink/pull/22935#discussion_r1254766401
##########
flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingLeaderElectionListener.java:
##########
@@ -61,6 +66,19 @@ private void put(LeaderElectionEvent leaderElectionEvent) {
}
}
+ public <T> T assertNextEvent(Class<T> expectedEventClass) throws
InterruptedException {
+ final LeaderElectionEvent leaderElectionEvent =
leaderElectionEvents.take();
+
+ if
(expectedEventClass.isAssignableFrom(leaderElectionEvent.getClass())) {
+ return expectedEventClass.cast(leaderElectionEvent);
+ }
+
+ throw new AssertionError(
+ String.format(
+ "The next event didn't match the expected event type
%s.",
+ expectedEventClass.getSimpleName()));
Review Comment:
```
assertThat(leaderElectionEvent.getClass).isInstanceOf(expectedEventClass);
return <cast>
```
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