1 files changed, 101 insertions, 0 deletions
diff --git a/jpa/tests/org.eclipse.jpt.utility.tests/src/org/eclipse/jpt/utility/tests/internal/ReverseComparatorTests.java b/jpa/tests/org.eclipse.jpt.utility.tests/src/org/eclipse/jpt/utility/tests/internal/ReverseComparatorTests.java
new file mode 100644
index 0000000000..7ae00fdc2e
--- /dev/null
+++ b/jpa/tests/org.eclipse.jpt.utility.tests/src/org/eclipse/jpt/utility/tests/internal/ReverseComparatorTests.java
@@ -0,0 +1,101 @@
+/*******************************************************************************
+ * Copyright (c) 2005, 2007 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ * 
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.utility.tests.internal;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import junit.framework.TestCase;
+import org.eclipse.jpt.utility.internal.ReverseComparator;
+
+public class ReverseComparatorTests extends TestCase {
+	private Comparator<String> naturalReverseComparator;
+	private Comparator<String> customComparator;
+	private Comparator<String> customReverseComparator;
+
+	public ReverseComparatorTests(String name) {
+		super(name);
+	}
+
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+		this.naturalReverseComparator = new ReverseComparator<String>();
+		this.customComparator = this.buildCustomComparator();
+		this.customReverseComparator = new ReverseComparator<String>(this.customComparator);
+	}
+
+	private Comparator<String> buildCustomComparator() {
+		return new Comparator<String>() {
+			public int compare(String s1, String s2) {
+				String lower1 = s1.toLowerCase();
+				String lower2 = s2.toLowerCase();
+				int result = lower1.compareTo(lower2);
+				if (result == 0) {
+					return s1.compareTo(s2); // use case to differentiate "equal" strings
+				}
+				return result;
+			}
+		};
+	}
+
+	private List<String> buildUnsortedList() {
+		List<String> result = new ArrayList<String>();
+		result.add("T");
+		result.add("Z");
+		result.add("Y");
+		result.add("M");
+		result.add("m");
+		result.add("a");
+		result.add("B");
+		result.add("b");
+		result.add("A");
+		return result;
+	}
+
+	private List<String> buildNaturallySortedList() {
+		List<String> result = new ArrayList<String>(this.buildUnsortedList());
+		Collections.sort(result);
+		return result;
+	}
+
+	private List<String> buildCustomSortedList() {
+		List<String> result = new ArrayList<String>(this.buildUnsortedList());
+		Collections.sort(result, this.customComparator);
+		return result;
+	}
+
+	@Override
+	protected void tearDown() throws Exception {
+		TestTools.clear(this);
+		super.tearDown();
+	}
+
+	public void testNatural() {
+		List<String> list = this.buildUnsortedList();
+		Collections.sort(list, this.naturalReverseComparator);
+		this.verifyList(this.buildNaturallySortedList(), list);
+	}
+
+	public void testCustom() {
+		List<String> list = this.buildUnsortedList();
+		Collections.sort(list, this.customReverseComparator);
+		this.verifyList(this.buildCustomSortedList(), list);
+	}
+
+	private void verifyList(List<String> normal, List<String> reverse) {
+		int size = normal.size();
+		int max = size - 1;
+		for (int i = 0; i < size; i++) {
+			assertEquals(normal.get(i), reverse.get(max - i));
+		}
+	}
+}