added code to handle macro expansion.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@1166 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/test/java/hudson/UtilTest.java

@@ -0,0 +1,24 @@
+package hudson;
+
+import junit.framework.TestCase;
+
+import java.util.Map;
+import java.util.HashMap;
+
+/**
+ * @author Kohsuke Kawaguchi
+ */
+public class UtilTest extends TestCase {
+    public void testReplaceMacro() {
+        Map<String,String> m = new HashMap<String,String>();
+        m.put("A","a");
+        m.put("AA","aa");
+        m.put("B","B");
+
+        // longest match
+        assertEquals("aa",Util.replaceMacro("$AA",m));
+
+        // invalid keys are ignored
+        assertEquals("$AAB",Util.replaceMacro("$AAB",m));
+    }
+}