attempt at incrementally refreshing the wind estimation cache instead of entirely removing interval's contents

java/com.sap.sailing.domain.test/src/com/sap/sailing/domain/test/ArrayListNavigableSetTest.java

@@ -0,0 +1,45 @@
+package com.sap.sailing.domain.test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotSame;
+import static org.junit.Assert.assertSame;
+
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.junit.Test;
+
+import com.sap.sailing.util.impl.ArrayListNavigableSet;
+
+public class ArrayListNavigableSetTest {
+    @Test
+    public void testReplacementInHashSet() {
+        Set<Integer> hashSet = new HashSet<Integer>();
+        testSet(hashSet);
+    }
+
+    @Test
+    public void testReplacementInArrayListNavigableSet() {
+        Set<Integer> arrayListNavigableSet = new ArrayListNavigableSet<Integer>(new Comparator<Integer>() {
+            @Override
+            public int compare(Integer o1, Integer o2) {
+                return o1.compareTo(o2);
+            }
+        });
+        testSet(arrayListNavigableSet);
+    }
+
+    private void testSet(Set<Integer> hashSet) {
+        Integer i1 = new Integer(1);
+        Integer i2 = new Integer(1);
+        assertNotSame(i1, i2);
+        assertEquals(i1, i2);
+        hashSet.add(i1);
+        boolean replaced = hashSet.add(i2);
+        assertFalse(replaced); // because s1 and s2 are equal
+        Integer integerFromSet = hashSet.iterator().next();
+        assertSame(i1, integerFromSet); // supposedly not replaced
+    }
+}