add utility methods for maven

maven-plugin/src/test/java/hudson/maven/MavenUtilTest.java

+package hudson.maven;
+
+/*
+ * Copyright 2013 Olivier Lamy
+ *
+ * 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.
+ */
+
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author Olivier Lamy
+ */
+public class MavenUtilTest
+{
+    @Test
+    public void testMaven2(){
+        Assert.assertEquals( MavenUtil.MavenVersion.MAVEN_2, MavenUtil.getMavenVersion( "2.2.1" ) );
+    }
+
+    @Test
+    public void testMaven301(){
+        Assert.assertEquals( MavenUtil.MavenVersion.MAVEN_3_0_X, MavenUtil.getMavenVersion( "3.0.1" ) );
+    }
+
+    @Test
+    public void testMaven31(){
+        Assert.assertEquals( MavenUtil.MavenVersion.MAVEN_3_1, MavenUtil.getMavenVersion( "3.1.0" ) );
+    }
+
+    @Test
+    public void eventSpy2x(){
+        Assert.assertFalse( MavenUtil.supportEventSpy( "2.2.1" ) );
+    }
+
+    @Test
+    public void eventSpy301(){
+        Assert.assertFalse( MavenUtil.supportEventSpy( "3.0.1" ) );
+    }
+
+    @Test
+    public void eventSpy302(){
+        Assert.assertTrue( MavenUtil.supportEventSpy( "3.0.2" ) );
+    }
+
+    @Test
+    public void eventSpy31x(){
+        Assert.assertTrue( MavenUtil.supportEventSpy( "3.1.0" ) );
+    }
+}