Let producer confirm timeout be 0

Fixes #20

Author: acogoluegnes

src/main/java/com/rabbitmq/stream/impl/StreamProducerBuilder.java

@@ -109,7 +109,7 @@ public ProducerBuilder confirmTimeout(Duration timeout) {
     if (timeout.isNegative()) {
       throw new IllegalArgumentException("the confirm timeout cannot be negative");
     }
-    if (timeout.compareTo(Duration.ofSeconds(1)) < 0) {
+    if (timeout.compareTo(Duration.ofSeconds(1)) < 0 && !timeout.isZero()) {
       throw new IllegalArgumentException("the confirm timeout cannot be less than 1 second");
     }
     this.confirmTimeout = timeout;

src/test/java/com/rabbitmq/stream/impl/StreamProducerUnitTest.java

@@ -14,6 +14,7 @@
 package com.rabbitmq.stream.impl;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyByte;
 import static org.mockito.ArgumentMatchers.anyInt;
@@ -44,6 +45,7 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.ToLongFunction;
 import java.util.stream.IntStream;
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -282,4 +284,17 @@ void enqueueTimeoutSendingShouldBlockWhenEnqueueTimeoutIsZero(int subEntrySize)
     assertThat(interruptedLatch.await(5, TimeUnit.SECONDS)).isTrue();
     assertThat(confirmCalled).isFalse();
   }
+
+  @ParameterizedTest
+  @CsvSource({"-1,false", "0,true", "500,false", "1000,true", "5000,true"})
+  void confirmTimeoutCanZeroAndLongerThanOneSecond(int timeoutInMs, boolean ok) throws Throwable {
+    Duration timeout = Duration.ofMillis(timeoutInMs);
+    StreamProducerBuilder builder = new StreamProducerBuilder(env);
+    ThrowingCallable call = () -> builder.confirmTimeout(timeout);
+    if (ok) {
+      call.call();
+    } else {
+      assertThatThrownBy(call).isInstanceOf(IllegalArgumentException.class);
+    }
+  }
 }