add test for version comparison

wise-webapp/src/test/java/com/wisemapping/test/importer/VersionComparisonTest.java

@@ -0,0 +1,27 @@
+package com.wisemapping.test.importer;
+
+import com.wisemapping.importer.ImporterException;
+import com.wisemapping.importer.VersionNumber;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+@Test
+public class VersionComparisonTest {
+
+    @Test
+    public void testVersionComparison() throws ImporterException {
+
+        final VersionNumber greatest = new VersionNumber("1.0.1");
+        final VersionNumber smaller = new VersionNumber("0.9.0");
+        final VersionNumber intermediate = new VersionNumber("1.0.0");
+
+        Assert.assertTrue(smaller.isSmallerThan(intermediate));
+        Assert.assertFalse(greatest.isSmallerThan(intermediate));
+        Assert.assertTrue(greatest.isGreaterThan(smaller));
+        Assert.assertFalse(intermediate.isGreaterThan(greatest));
+        Assert.assertTrue(intermediate.equals(intermediate));
+        Assert.assertFalse(greatest.equals(smaller));
+
+    }
+
+}