showuon commented on a change in pull request #9888: URL: https://github.com/apache/kafka/pull/9888#discussion_r559301599
########## File path: streams/src/test/java/org/apache/kafka/streams/integration/AdjustStreamThreadCountTest.java ########## @@ -90,24 +91,61 @@ public void setup() { ); } + private void startStreamsAndWaitForRunning(final KafkaStreams kafkaStreams) throws InterruptedException { + kafkaStreams.start(); + waitForRunning(); + } + @After public void teardown() throws IOException { + stateTransitionHistory.clear(); purgeLocalStreamsState(properties); } + private void addStreamStateChangeListener(final KafkaStreams kafkaStreams) { + // we store each new state in state transition so that we won't miss any state change Review comment: Sure ########## File path: streams/src/test/java/org/apache/kafka/streams/integration/AdjustStreamThreadCountTest.java ########## @@ -90,24 +91,61 @@ public void setup() { ); } + private void startStreamsAndWaitForRunning(final KafkaStreams kafkaStreams) throws InterruptedException { + kafkaStreams.start(); + waitForRunning(); + } + @After public void teardown() throws IOException { + stateTransitionHistory.clear(); purgeLocalStreamsState(properties); } + private void addStreamStateChangeListener(final KafkaStreams kafkaStreams) { + // we store each new state in state transition so that we won't miss any state change + kafkaStreams.setStateListener( + (newState, oldState) -> stateTransitionHistory.add(newState) + ); + } + + private void waitForRunning() throws InterruptedException { + waitForCondition( + () -> !stateTransitionHistory.isEmpty() && + stateTransitionHistory.get(stateTransitionHistory.size() - 1).equals(KafkaStreams.State.RUNNING), + DEFAULT_DURATION.toMillis(), + () -> String.format("Client did not transit to state %s in %d seconds", + KafkaStreams.State.RUNNING, DEFAULT_DURATION.toMillis() / 1000) + ); + } + + // verify if state change from "before" state into "after" state + private boolean hasStateTransition(final KafkaStreams.State before, final KafkaStreams.State after) { + final int historySize = stateTransitionHistory.size(); + // should have at least 2 states in history Review comment: Sure ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org