Index: /trunk/java-utils-test/src/test/java/de/ugoe/cs/util/StopWatchTest.java
===================================================================
--- /trunk/java-utils-test/src/test/java/de/ugoe/cs/util/StopWatchTest.java	(revision 1130)
+++ /trunk/java-utils-test/src/test/java/de/ugoe/cs/util/StopWatchTest.java	(revision 1130)
@@ -0,0 +1,199 @@
+//   Copyright 2012 Georg-August-Universität Göttingen, Germany
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+
+package de.ugoe.cs.util;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+/**
+ *
+ */
+public class StopWatchTest {
+
+    /**
+     * 
+     */
+    @Test
+    public void test_01() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        String id = "id1";
+        stopWatch.start(id);
+        Thread.sleep(100);
+        stopWatch.stop(id);
+        
+        assertTrue((98 < stopWatch.getDuration(id)) && (stopWatch.getDuration(id) < 102));
+    }
+
+    /**
+     * 
+     */
+    @Test
+    public void test_02() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        String id;
+        for (int i = 0; i < 10; i++) {
+            id = "id" + i;
+            stopWatch.start(id);
+        }
+        
+        for (int i = 0; i < 10; i++) {
+            id = "id" + i;
+            stopWatch.stop(id);
+        }
+        
+        for (int i = 0; i < 10; i++) {
+            id = "id" + i;
+            assertTrue(stopWatch.getDuration(id) >= 0);
+        }
+    }
+
+    /**
+     * 
+     */
+    @Test(expected=IllegalArgumentException.class)
+    public void test_03() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        stopWatch.stop("id1");
+    }
+
+    /**
+     * 
+     */
+    @Test(expected=IllegalArgumentException.class)
+    public void test_04() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        stopWatch.getDuration("id1");
+    }
+
+    /**
+     * 
+     */
+    @Test(expected=IllegalStateException.class)
+    public void test_05() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        String id = "id1";
+        stopWatch.start(id);
+        stopWatch.stop(id);
+        
+        stopWatch.stop(id);
+    }
+
+    /**
+     * 
+     */
+    @Test(expected=IllegalStateException.class)
+    public void test_06() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        String id = "id1";
+        stopWatch.start(id);
+        stopWatch.getDuration(id);
+        
+        stopWatch.stop(id);
+    }
+
+    /**
+     * 
+     */
+    @Test(expected=IllegalStateException.class)
+    public void test_07() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        String id = "id1";
+        stopWatch.start(id);
+        
+        stopWatch.start(id);
+    }
+
+
+    /**
+     * 
+     */
+    @Test
+    public void test_08() throws Exception {
+        StopWatch stopWatch = new StopWatch();
+        
+        String id;
+        // start 0 - 4
+        for (int i = 0; i < 5; i++) {
+            id = "id" + i;
+            stopWatch.start(id);
+        }
+        
+        Thread.sleep(10);
+        
+        // stop 0 - 2
+        for (int i = 0; i < 3; i++) {
+            id = "id" + i;
+            stopWatch.stop(id);
+        }
+        
+        // start 5 - 7
+        for (int i = 5; i < 8; i++) {
+            id = "id" + i;
+            stopWatch.start(id);
+        }
+        
+        Thread.sleep(10);
+        
+        // stop 3 - 6
+        for (int i = 3; i < 7; i++) {
+            id = "id" + i;
+            stopWatch.stop(id);
+        }
+        
+        // start 8 - 9
+        for (int i = 8; i < 10; i++) {
+            id = "id" + i;
+            stopWatch.start(id);
+        }
+        
+        Thread.sleep(10);
+        
+        // start 0 - 6
+        for (int i = 0; i < 7; i++) {
+            id = "id" + i;
+            stopWatch.start(id);
+        }
+
+        Thread.sleep(10);
+        
+        // stop all
+        for (int i = 2; i < 7; i++) {
+            id = "id" + i;
+            stopWatch.stop(id);
+        }
+
+        // start all
+        for (int i = 2; i < 7; i++) {
+            id = "id" + i;
+            stopWatch.start(id);
+        }
+        
+        Thread.sleep(10);
+        
+        // stop all and ensure, that durations are returned
+        for (int i = 2; i < 7; i++) {
+            id = "id" + i;
+            assertTrue(stopWatch.getDuration(id) >= 10);
+        }
+    }
+}