diff -r 000000000000 -r a0f15cb8c730 chat/client/src/test/java/org/apidesign/demo/chat/ChatClientTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/chat/client/src/test/java/org/apidesign/demo/chat/ChatClientTest.java	Fri Apr 22 05:56:47 2016 +0200
@@ -0,0 +1,50 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2013 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package org.apidesign.demo.chat;
+
+import static org.testng.Assert.*;
+import org.testng.annotations.Test;
+
+/**
+ *
+ * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ */
+public class ChatClientTest {
+    public ChatClientTest() {
+    }
+    
+    @Test public void hasSendEnabled() {
+        ChatModel m = new ChatModel();
+        assertFalse(m.isSendEnabled(), "By default disabled");
+        m.setComment("some msg");
+        m.setUser("by me");
+        assertTrue(m.isSendEnabled(), "Now it is enabled");
+        m.setUser(null);
+        assertFalse(m.isSendEnabled(), "No user means disabled");
+        m.setUser("by him");
+        assertTrue(m.isSendEnabled(), "Again enabled");
+        m.setComment("");
+        assertFalse(m.isSendEnabled(), "Empty text means disabled");
+    }
+}