Add test case for VELOCITY-285 (forgot to check that in).

git-svn-id: https://svn.apache.org/repos/asf/jakarta/velocity/engine/trunk@476788 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/org/apache/velocity/test/issues/Velocity285TestCase.java b/src/test/org/apache/velocity/test/issues/Velocity285TestCase.java
new file mode 100644
index 0000000..322c719
--- /dev/null
+++ b/src/test/org/apache/velocity/test/issues/Velocity285TestCase.java
@@ -0,0 +1,122 @@
+package org.apache.velocity.test.issues;
+
+/*
+ * 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 java.io.BufferedWriter;
+import java.io.FileOutputStream;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+
+import junit.framework.Test;
+import junit.framework.TestSuite;
+
+import org.apache.velocity.Template;
+import org.apache.velocity.VelocityContext;
+import org.apache.velocity.app.Velocity;
+import org.apache.velocity.runtime.RuntimeSingleton;
+import org.apache.velocity.test.BaseTestCase;
+
+/**
+ * Test Case for <a href="http://issues.apache.org/jira/browse/VELOCITY-285">Velocity Issue 285</a>.
+ */
+public class Velocity285TestCase
+        extends BaseTestCase
+{
+    /**
+     * Comparison file extension.
+     */
+    private static final String CMP_FILE_EXT = "cmp";
+
+    /**
+     * Comparison file extension.
+     */
+    private static final String RESULT_FILE_EXT = "res";
+
+    /**
+     * Results relative to the build directory.
+     */
+    private static final String RESULTS_DIR = TEST_RESULT_DIR + "/issues/velocity-285";
+
+    /**
+     * Template Directory
+     */
+    private static final String TEMPLATE_DIR = TEST_COMPARE_DIR + "/issues/velocity-285/templates";
+
+    /**
+     * Results relative to the build directory.
+     */
+    private static final String COMPARE_DIR = TEST_COMPARE_DIR + "/issues/velocity-285/compare";
+
+
+    public Velocity285TestCase(final String name)
+    	throws Exception
+    {
+        super(name);
+    }
+
+    public static Test suite()
+    {
+        return new TestSuite(Velocity285TestCase.class);
+    }
+
+    public void setUp()
+            throws Exception
+    {
+
+        assureResultsDirectoryExists(RESULTS_DIR);
+
+        Velocity.addProperty(
+                Velocity.FILE_RESOURCE_LOADER_PATH, TEMPLATE_DIR);
+
+        Velocity.init();
+    }
+
+    public void testVelocity285()
+            throws Exception
+    {
+        Template t = executeTest("velocity285.vm");
+    }
+
+    protected Template executeTest(final String templateName)
+    	throws Exception
+    {
+        Template template = RuntimeSingleton.getTemplate(templateName);
+
+        FileOutputStream fos =
+                new FileOutputStream (
+                        getFileName(RESULTS_DIR, templateName, RESULT_FILE_EXT));
+
+        Writer writer = new BufferedWriter(new OutputStreamWriter(fos));
+
+        VelocityContext context = new VelocityContext();
+
+        template.merge(context, writer);
+        writer.flush();
+        writer.close();
+
+        if (!isMatch(RESULTS_DIR, COMPARE_DIR, templateName,
+                        RESULT_FILE_EXT, CMP_FILE_EXT))
+        {
+            fail("Output incorrect for Template: " + templateName);
+        }
+
+        return template;
+    }
+}
diff --git a/test/issues/velocity-285/compare/velocity285.vm.cmp b/test/issues/velocity-285/compare/velocity285.vm.cmp
new file mode 100644
index 0000000..459a03a
--- /dev/null
+++ b/test/issues/velocity-285/compare/velocity285.vm.cmp
@@ -0,0 +1,23 @@
+<pre>
+
+call to test_loop ([[a, b], [a, b]])
+    in the loop the param should not be changed : ([[a, b], [a, b]])
+call to test_loop ([a, b])
+    in the loop the param should not be changed : ([a, b])
+call to test_loop (a)
+return
+    in the loop the param should not be changed : ([a, b])
+call to test_loop (b)
+return
+return
+    in the loop the param should not be changed : ([[a, b], [a, b]])
+call to test_loop ([a, b])
+    in the loop the param should not be changed : ([a, b])
+call to test_loop (a)
+return
+    in the loop the param should not be changed : ([a, b])
+call to test_loop (b)
+return
+return
+return
+</pre>
diff --git a/test/issues/velocity-285/templates/velocity285.vm b/test/issues/velocity-285/templates/velocity285.vm
new file mode 100644
index 0000000..64b1d52
--- /dev/null
+++ b/test/issues/velocity-285/templates/velocity285.vm
@@ -0,0 +1,14 @@
+<pre>
+#macro (test_loop $p)
+call to test_loop ($p)
+#foreach($child in $p)
+    in the loop the param should not be changed : ($p)
+#test_loop($child)
+#end
+return
+#end
+
+#set($l1=["a","b"])
+#set($l = [$l1,$l1])
+#test_loop($l)
+</pre>