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diff --git a/watchmaker/examples/src/java/test/org/uncommons/watchmaker/examples/biomorphs/BiomorphTest.java b/watchmaker/examples/src/java/test/org/uncommons/watchmaker/examples/biomorphs/BiomorphTest.java
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+//=============================================================================
+// Copyright 2006-2010 Daniel W. Dyer
+//
+// 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 org.uncommons.watchmaker.examples.biomorphs;
+
+import java.util.Arrays;
+import org.testng.annotations.Test;
+
+/**
+ * Some basic sanity checks for the {@link Biomorph} type used in the
+ * interactive evolution example program.
+ * @author Daniel Dyer
+ */
+public class BiomorphTest
+{
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testInsufficientGenes()
+    {
+        new Biomorph(new int[Biomorph.GENE_COUNT - 1]);
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testTooManyGenes()
+    {
+        new Biomorph(new int[Biomorph.GENE_COUNT + 1]);
+    }
+
+
+    @Test
+    public void testEquality()
+    {
+        Biomorph biomorph1 = new Biomorph(new int[Biomorph.GENE_COUNT]);
+        Biomorph biomorph2 = new Biomorph(new int[Biomorph.GENE_COUNT]);
+        int[] genes = new int[Biomorph.GENE_COUNT];
+        Arrays.fill(genes, 2);
+        Biomorph biomorph3 = new Biomorph(genes);
+
+        assert biomorph1.equals(biomorph1) : "Equality must be reflexive.";
+        assert biomorph1.equals(biomorph2) : "Biomorphs with identical genes should be considered equal.";
+        assert biomorph2.equals(biomorph1) : "Equality must be reflective.";
+        assert biomorph1.hashCode() == biomorph2.hashCode() : "Equal objects must have identical hash codes.";
+        assert !biomorph1.equals(biomorph3) : "Biomorphs with different genes should not be considered equal.";
+
+        assert !biomorph1.equals(null) : "No object should be considered equal to a null reference.";
+        assert !biomorph3.equals(genes) : "Biomorphs should not be considered equal to objects of different types.";
+    }
+}