Adding a basic NullComparatorTest

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1159023 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/commons/lang3/compare/NullComparatorTest.java

@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.commons.lang3.compare;
+
+import static org.junit.Assert.*;
+
+import java.util.Comparator;
+
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * <p>
+ * Tests the methods in the {@link org.apache.commons.lang3.compare.NullComparator} class.
+ * </p>
+ * 
+ * @version $Id: RangeTest.java 1147537 2011-07-17 06:10:37Z mbenson $
+ */
+public class NullComparatorTest {
+
+    @Before
+    public void setUp() {
+    }
+
+    //-----------------------------------------------------------------------
+    @Test
+    public void testNullHigh() {
+        Comparator c = new NullComparator(true);
+        assertEquals("Null was not treated as high", -1, c.compare(new Object(), null) );
+        assertEquals("Null was not treated as high", 1, c.compare(null, new Object()) );
+    }
+
+    @Test
+    public void testNullLow() {
+        Comparator c = new NullComparator(false);
+        assertEquals("Null was not treated as low", 1, c.compare(new Object(), null) );
+        assertEquals("Null was not treated as low", -1, c.compare(null, new Object()) );
+    }
+
+}