#8 - The execution of the versions plugin now cleans up after itself.

Tweaked the expansion of the Maven plugins to only map the plugin so that e.g. versions:set gets expanded to the fully qualified version of the versions plugin as registered in application.properties.

Tweaked the expansion to inspect all arguments given but ignore properties not containing a colon or staring with a dash.

src/test/java/org/springframework/data/release/build/MavenPropertiesUnitTests.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed 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.springframework.data.release.build;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import java.util.Collections;
+
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Unit tests for {@link MavenProperties}.
+ * 
+ * @author Oliver Gierke
+ */
+public class MavenPropertiesUnitTests {
+
+	MavenProperties properties;
+
+	@Before
+	public void setUp() {
+
+		this.properties = new MavenProperties();
+		this.properties.setPlugins(Collections.singletonMap("versions", "org.codehaus.mojo:versions-maven-plugin:2.2"));
+	}
+
+	/**
+	 * @see #8
+	 */
+	@Test
+	public void expandsGoalsCorrectly() {
+
+		assertThat(properties.getFullyQualifiedPlugin("versions:set"),
+				is("org.codehaus.mojo:versions-maven-plugin:2.2:set"));
+	}
+
+	/**
+	 * @see #8
+	 */
+	@Test
+	public void doesNotExpandGoalStartingWithDash() {
+		assertThat(properties.getFullyQualifiedPlugin("-versions:set"), is("-versions:set"));
+	}
+
+	/**
+	 * @see #8
+	 */
+	@Test
+	public void doesNotExpandGoalWithoutColon() {
+		assertThat(properties.getFullyQualifiedPlugin("versions-set"), is("versions-set"));
+	}
+}