Bug 470781: test default values can be overridden
diff --git a/org.eclipse.sisu.plexus.tests/src/org/eclipse/sisu/plexus/DefaultValuesTest.java b/org.eclipse.sisu.plexus.tests/src/org/eclipse/sisu/plexus/DefaultValuesTest.java
new file mode 100644
index 0000000..ec446fa
--- /dev/null
+++ b/org.eclipse.sisu.plexus.tests/src/org/eclipse/sisu/plexus/DefaultValuesTest.java
@@ -0,0 +1,87 @@
+/*******************************************************************************
+ * Copyright (c) 2010, 2015 Sonatype, Inc.
+ * 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:
+ *    Stuart McCulloch (Sonatype, Inc.) - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sisu.plexus;
+
+import java.util.Arrays;
+import java.util.List;
+
+import junit.framework.TestCase;
+
+import org.codehaus.plexus.component.configurator.BasicComponentConfigurator;
+import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
+import org.codehaus.plexus.configuration.PlexusConfiguration;
+import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;
+
+public class DefaultValuesTest
+    extends TestCase
+{
+    public void testDefaultBasicValue()
+        throws ComponentConfigurationException
+    {
+        final ComponentWithInt componentWithString = new ComponentWithInt();
+
+        final PlexusConfiguration config = new XmlPlexusConfiguration( "config" );
+        final PlexusConfiguration target = new XmlPlexusConfiguration( "target" );
+        target.setAttribute( "default-value", "TEST" );
+        config.addChild( target );
+
+        new BasicComponentConfigurator().configureComponent( componentWithString, config, null );
+        assertEquals( "TEST", componentWithString.target );
+
+        target.setValue( "OVERRIDE" );
+
+        new BasicComponentConfigurator().configureComponent( componentWithString, config, null );
+        assertEquals( "OVERRIDE", componentWithString.target );
+    }
+
+    public void testDefaultCollection()
+        throws ComponentConfigurationException
+    {
+        final ComponentWithArray componentWithArray = new ComponentWithArray();
+        final ComponentWithList componentWithList = new ComponentWithList();
+
+        final PlexusConfiguration config = new XmlPlexusConfiguration( "config" );
+        final PlexusConfiguration target = new XmlPlexusConfiguration( "target" );
+        target.setAttribute( "default-value", "one,two,three" );
+        config.addChild( target );
+
+        new BasicComponentConfigurator().configureComponent( componentWithArray, config, null );
+        assertTrue( Arrays.equals( new String[] { "one", "two", "three" }, componentWithArray.target ) );
+
+        new BasicComponentConfigurator().configureComponent( componentWithList, config, null );
+        assertEquals( Arrays.asList( "one", "two", "three" ), componentWithList.target );
+
+        final PlexusConfiguration element = new XmlPlexusConfiguration( "element" );
+        element.setValue( "OVERRIDE" );
+        target.addChild( element );
+
+        new BasicComponentConfigurator().configureComponent( componentWithArray, config, null );
+        assertTrue( Arrays.equals( new String[] { "OVERRIDE" }, componentWithArray.target ) );
+
+        new BasicComponentConfigurator().configureComponent( componentWithList, config, null );
+        assertEquals( Arrays.asList( "OVERRIDE" ), componentWithList.target );
+    }
+
+    static class ComponentWithInt
+    {
+        String target;
+    }
+
+    static class ComponentWithArray
+    {
+        String[] target;
+    }
+
+    static class ComponentWithList
+    {
+        List<String> target;
+    }
+}