A couple of tests added

testdata/dot-ref/RunnableRef.dot

@@ -0,0 +1,17 @@
+#!/usr/local/bin/dot
+#
+# Class diagram 
+# Generated by UmlGraph version 4.1 (http://www.spinellis.gr/sw/umlgraph)
+#
+
+digraph G {
+	edge [fontname="Helvetica",fontsize=10,labelfontname="Helvetica",labelfontsize=10];
+	node [fontname="Helvetica",fontsize=10,shape=plaintext];
+	// test.RunnableRef
+	c99 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td> RunnableRef </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+	// test.RunnableRef depend java.lang.Runnable
+	c99:p -> c100:p [taillabel="", label="", headlabel="", fontname="Helvetica", fontcolor="black", fontsize=10.0, color="black", arrowhead=open, style=dashed];
+	// java.lang.Runnable
+	c100 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td> &laquo;interface&raquo; </td></tr><tr><td> Runnable </td></tr></table></td></tr></table>>, fontname="Helvetica", fontcolor="black", fontsize=10.0];
+}
+

testdata/dot-ref/Style.dot

@@ -0,0 +1,25 @@
+#!/usr/local/bin/dot
+#
+# Class diagram 
+# Generated by UmlGraph version 4.1 (http://www.spinellis.gr/sw/umlgraph)
+#
+
+digraph G {
+	edge [fontname="arialbd",fontsize=10,labelfontname="arialbd",labelfontsize=10];
+	node [fontname="arial",fontsize=10,shape=plaintext];
+	// test.AbstractBase
+	c113 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td> &laquo;base&raquo; </td></tr><tr><td><font face="arialbi"> AbstractBase </font></td></tr><tr><td><font point-size="8.0"> test </font></td></tr><tr><td align="right"><font face="ariali" point-size="6.0"> {since = forever} </font></td></tr></table></td></tr><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="left">  field </td></tr><tr><td align="right"><font face="ariali" point-size="6.0"> {recent = addition} </font></td></tr></table></td></tr><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td align="left"><font face="Helvetica-Oblique" point-size="9.0">  abstractMethod() </font></td></tr><tr><td align="left">  concreteMethod() </td></tr></table></td></tr></table>>, fontname="arial", fontcolor="black", fontsize=9.0];
+	// test.Composite
+	c114 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td><font face="arialbd"> Composite </font></td></tr><tr><td><font point-size="8.0"> test </font></td></tr></table></td></tr></table>>, fontname="arial", fontcolor="black", fontsize=9.0];
+	// test.Style
+	c115 [label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td><font face="arialbd"> Style </font></td></tr><tr><td><font point-size="8.0"> test </font></td></tr></table></td></tr></table>>, fontname="arial", fontcolor="black", fontsize=9.0];
+	//test.Composite extends test.AbstractBase
+	c113:p -> c114:p [dir=back,arrowtail=empty];
+	// test.Composite composed from.Outer.Space.AlienClass
+	c114:p -> c116:p [taillabel="1", label="has", headlabel="*", fontname="arialbd", fontcolor="black", fontsize=10.0, color="black", arrowhead=none, arrowtail=diamond];
+	//test.Style extends test.AbstractBase
+	c113:p -> c115:p [dir=back,arrowtail=empty];
+	// from.Outer.Space.AlienClass
+	c116[label=<<table border="0" cellborder="1" cellspacing="0" cellpadding="2" port="p"><tr><td><table border="0" cellspacing="0" cellpadding="1"><tr><td><font face="arialbd"> AlienClass </font></td></tr><tr><td><font point-size="8.0"> from.Outer.Space </font></td></tr></table></td></tr></table>>, fontname="arial", fontcolor="black", fontsize=9.0];
+}
+

testdata/java/RunnableRef.java

@@ -0,0 +1,14 @@
+// $Id$
+package test;
+
+/**
+ * @hidden
+ * @opt inferrel
+ * @opt inferdep
+ */
+class UMLOptions{}
+
+public class RunnableRef {
+    public int method(Runnable r);
+}
+

testdata/java/Style.java

@@ -0,0 +1,39 @@
+// $Id$
+package net.sf.whatever.test;
+
+/**
+ * @hidden
+ * @opt postfixpackage
+ * @opt edgefontname arialbd
+ * @opt nodefontname arial
+ * @opt nodefontsize 9
+ * @opt nodefontabstract ariali
+ * @opt nodefontclassname arialbd
+ * @opt nodefontclassabstractname arialbi
+ * @opt nodefonttagsize 6
+ * @opt nodefonttagname ariali
+ * @opt nodefontpackagesize 8
+ * @opt operations
+ * @opt attributes
+ * @opt qualify
+ * @opt types
+ */
+class UMLOptions{}
+
+/**
+ * @stereotype base
+ * @tagvalue since 1.0
+ */
+abstract class AbstractBase {
+    /** @tagvalue since 1.5 */
+    private int field;
+    public abstract void abstractMethod();
+    public int concreteMethod() { return 1; }
+}
+
+/**
+ * @composed 1 has * from.Outer.Space.AlienClass
+ */
+class Composite extends AbstractBase {}
+
+public class Style extends AbstractBase {}