Use static batching in test to have a number for confirm latency

Confirm latency can be 0 with dynamic batching, because messages are
sent right away.

Author: acogoluegnes

src/test/java/com/rabbitmq/stream/perf/StreamPerfTestTest.java

@@ -89,7 +89,11 @@ static void tearDown() {
   }
 
   static void waitOneSecond() throws InterruptedException {
-    Thread.sleep(1000L);
+    wait(Duration.ofSeconds(1));
+  }
+
+  static void wait(Duration duration) throws InterruptedException {
+    Thread.sleep(duration.toMillis());
   }
 
   private static HttpResponse httpRequest(String urlString) throws Exception {
@@ -427,7 +431,7 @@ void metricsTagsShouldShowUpInHttpEndpoint() throws Exception {
 
   @Test
   void publishConfirmLatencyShouldBeIncludedWhenOptionIsEnabled() throws Exception {
-    Future<?> run = run(builder().confirmLatency());
+    Future<?> run = run(builder().confirmLatency().dynamicBatch(false));
     waitUntilStreamExists(s);
     waitOneSecond();
     run.cancel(true);
@@ -619,6 +623,11 @@ ArgumentsBuilder confirmLatency() {
       return this;
     }
 
+    ArgumentsBuilder dynamicBatch(boolean dynamicBatch) {
+      arguments.put("dynamic-batch-size", String.valueOf(dynamicBatch));
+      return this;
+    }
+
     ArgumentsBuilder maxLengthBytes(ByteCapacity capacity) {
       arguments.put("max-length-bytes", capacity.toString());
       return this;