diff -r b632733724a8 -r a2e90b86638a samples/erasure/src-impl/test/ErasureTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/samples/erasure/src-impl/test/ErasureTest.java	Tue Oct 18 07:10:23 2011 +0200
@@ -0,0 +1,20 @@
+package test;
+
+import api.Erasure;
+import java.util.Set;
+import java.util.TreeSet;
+
+public class ErasureTest {
+    // BEGIN: variance.erasure.test
+    public static void main(String[] args) {
+        Set<Integer> oneToTen = new TreeSet<Integer>();
+        for (int i = 1; i <= 10; i++) {
+            oneToTen.add(i);
+        }
+        
+        boolean positive = Erasure.arePositive(oneToTen);
+        System.err.println("positive = " + positive);
+        assert positive : "The nubmers are positive: " + oneToTen;
+    }
+    // END: variance.erasure.test
+}