We love the unit tests bay-bee!

git-svn-id: https://samskivert.googlecode.com/svn/trunk@745 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/tests/src/java/com/samskivert/util/ObserverListTest.java

@@ -0,0 +1,101 @@
+//
+// $Id: ObserverListTest.java,v 1.1 2002/05/16 22:00:07 mdb Exp $
+
+package com.samskivert.util;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+
+import com.samskivert.Log;
+
+/**
+ * Tests the {@link ObserverList} class.
+ */
+public class ObserverListTest extends TestCase
+{
+    public ObserverListTest ()
+    {
+        super(ObserverListTest.class.getName());
+    }
+
+    public void runTest ()
+    {
+//         Log.info("Testing safe list.");
+        testList(new ObserverList(ObserverList.SAFE_IN_ORDER_NOTIFY));
+
+//         Log.info("Testing unsafe list.");
+        testList(new ObserverList(ObserverList.FAST_UNSAFE_NOTIFY));
+    }
+
+    public void testList (final ObserverList list)
+    {
+        final int[] notifies = new int[1];
+
+        for (int i = 0; i < 1000; i++) {
+            // add some test observers
+            list.add(new TestObserver(1));
+            list.add(new TestObserver(2));
+            list.add(new TestObserver(3));
+            list.add(new TestObserver(4));
+
+            int ocount = list.size();
+            notifies[0] = 0;
+
+            list.apply(new ObserverList.ObserverOp() {
+                public boolean apply (Object obs) {
+                    notifies[0]++;
+                    ((TestObserver)obs).foozle();
+
+                    // 1/3 of the time, remove the observer; 1/3 of the
+                    // time append a new observer; 1/3 of the time do
+                    // nothing
+                    double rando = Math.random();
+                    if (rando < 0.33) {
+                        return false;
+
+                    } else if (rando > 0.66) {
+                        list.add(new TestObserver(5));
+                    }
+                    return true;
+                }
+            });
+
+//             Log.info("had " + ocount + "; notified " + notifies[0] +
+//                      "; size " + list.size() + ".");
+
+            assertTrue("had " + ocount + "; notified " + notifies[0],
+                       ocount == notifies[0]);
+            list.clear();
+        }
+    }
+
+    public static Test suite ()
+    {
+        return new ObserverListTest();
+    }
+
+    public static void main (String[] args)
+    {
+        ObserverListTest test = new ObserverListTest();
+        test.runTest();
+    }
+
+    protected static class TestObserver
+    {
+        public TestObserver (int index)
+        {
+            _index = index;
+        }
+
+        public void foozle ()
+        {
+//             Log.info("foozle! " + _index);
+        }
+
+        public String toString ()
+        {
+            return Integer.toString(_index);
+        }
+        protected int _index;
+    }
+}