Converts content to a proper CSS

core/src/test/java/org/apache/struts2/dispatcher/StaticContentLoaderTest.java

@@ -57,7 +57,7 @@ public class StaticContentLoaderTest extends TestCase {
 
     public void testValidRersources() throws IOException {
         contentLoader.findStaticResource("/struts/resource.css", req, res);
-        assertTrue(res.getContentAsString().contains("heya!"));
+        assertTrue(res.getContentAsString().contains("color: red;"));
     }
 
     public void testInvalidRersources1() throws IOException {

core/src/test/resources/org/apache/struts2/static/resource.css

@@ -1 +1,21 @@
-heya!
+/*
+ * 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.
+ */
+p {
+    color: red;
+}