--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/org/tmatesoft/hg/test/TestRevisionSet.java	Tue Jun 25 20:48:37 2013 +0200
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2013 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.test;
+
+import java.util.Arrays;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.tmatesoft.hg.core.Nodeid;
+import org.tmatesoft.hg.internal.RevisionSet;
+
+/**
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class TestRevisionSet {
+	
+	@Rule
+	public ErrorCollectorExt errorCollector = new ErrorCollectorExt();
+	
+	@Test
+	public void testRegularSetOperations() {
+		Nodeid n1 = Nodeid.fromAscii("c75297c1786734589175c673db40e8ecaa032b09");
+		Nodeid n2 = Nodeid.fromAscii("3b7d51ed4c65082f9235e3459e282d7ff723aa97");
+		Nodeid n3 = Nodeid.fromAscii("14dac192aa262feb8ff6645a102648498483a188");
+		Nodeid n4 = Nodeid.fromAscii("1deea2f332183c947937f6df988c2c6417efc217");
+		RevisionSet a = f(n1, n2, n3);
+		RevisionSet b = f(n3, n4);
+		RevisionSet union_ab = f(n1, n2, n3, n4);
+		RevisionSet intersect_ab = f(n3);
+		RevisionSet subtract_ab = f(n1, n2);
+		RevisionSet subtract_ba = f(n4);
+		RevisionSet symDiff_ab = f(n1, n2, n4);
+		
+		errorCollector.assertEquals(union_ab, a.union(b));
+		errorCollector.assertEquals(union_ab, b.union(a));
+		errorCollector.assertEquals(intersect_ab, a.intersect(b));
+		errorCollector.assertEquals(intersect_ab, b.intersect(a));
+		errorCollector.assertEquals(subtract_ab, a.subtract(b));
+		errorCollector.assertEquals(subtract_ba, b.subtract(a));
+		errorCollector.assertEquals(symDiff_ab, a.symmetricDifference(b));
+		errorCollector.assertEquals(symDiff_ab, b.symmetricDifference(a));
+	}
+
+	
+	private static RevisionSet f(Nodeid... nodes) {
+		return new RevisionSet(Arrays.asList(nodes));
+	}
+}