Add test case

Author: michaelklishin

test/src/com/rabbitmq/client/test/functional/ExceptionMessages.java

@@ -0,0 +1,37 @@
+package com.rabbitmq.client.test.functional;
+
+import com.rabbitmq.client.AlreadyClosedException;
+import com.rabbitmq.client.test.BrokerTestCase;
+
+import java.io.IOException;
+import java.util.UUID;
+
+public class ExceptionMessages extends BrokerTestCase {
+    public void testAlreadyClosedExceptionMessageWithChannelError() throws IOException {
+        String uuid = UUID.randomUUID().toString();
+        try {
+            channel.queueDeclarePassive(uuid);
+            fail("expected queueDeclarePassive to throw");
+        } catch (IOException e) {
+            // ignored
+        }
+
+        try {
+            channel.queueDeclarePassive(uuid);
+            fail("expected queueDeclarePassive to throw");
+        } catch (AlreadyClosedException ace) {
+            assertTrue(ace.getMessage().startsWith("channel is already closed due to channel error"));
+        }
+    }
+
+    public void testAlreadyClosedExceptionMessageWithCleanClose() throws IOException {
+        String uuid = UUID.randomUUID().toString();
+
+        try {
+            channel.close();
+            channel.queueDeclare(uuid, false, false, false, null);
+        } catch (AlreadyClosedException ace) {
+            assertTrue(ace.getMessage().startsWith("channel is already closed due to clean channel shutdown"));
+        }
+    }
+}