Struts example source code file (ContentTypeHandlerManagerTest.java)

This example Struts source code file (ContentTypeHandlerManagerTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

contenttypehandler, contenttypehandler, defaultcontenttypehandlermanager, io, ioexception, ioexception, mock, mock, mockhttpservletrequest, mockhttpservletresponse, object, override, string, string, testcase, util

The Struts ContentTypeHandlerManagerTest.java source code

/*
 * $Id: ContentTypeHandlerManagerTest.java 676195 2008-07-12 15:55:58Z mrdon $
 *
 * 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.
 */

package org.apache.struts2.rest;

import com.mockobjects.dynamic.C;
import com.mockobjects.dynamic.Mock;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.config.entities.ActionConfig;
import com.opensymphony.xwork2.inject.Container;
import junit.framework.TestCase;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.rest.handler.ContentTypeHandler;
import org.apache.struts2.rest.handler.FormUrlEncodedHandler;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;

import static javax.servlet.http.HttpServletResponse.SC_NOT_MODIFIED;
import static javax.servlet.http.HttpServletResponse.SC_OK;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;

public class ContentTypeHandlerManagerTest extends TestCase {

    private DefaultContentTypeHandlerManager mgr;
    private MockHttpServletResponse mockResponse;
    private MockHttpServletRequest mockRequest;

    @Override
    public void setUp() {
        mgr = new DefaultContentTypeHandlerManager();
        mockResponse = new MockHttpServletResponse();
        mockRequest = new MockHttpServletRequest();
        mockRequest.setMethod("GET");
        ActionContext.setContext(new ActionContext(new HashMap()));
        ServletActionContext.setRequest(mockRequest);
        ServletActionContext.setResponse(mockResponse);
    }

    @Override
    public void tearDown() {
        mockRequest = null;
        mockRequest = null;
        mgr = null;
    }

    public void testHandleResultOK() throws IOException {

        String obj = "mystring";
        ContentTypeHandler handler = new ContentTypeHandler() {
            public void toObject(Reader in, Object target) {}
            public String fromObject(Object obj, String resultCode, Writer stream) throws IOException {
                stream.write(obj.toString());
                return resultCode;
            }
            public String getContentType() { return "foo"; }
            public String getExtension() { return "foo"; }
        };
        mgr.handlersByExtension.put("xml", handler);
        mgr.defaultExtension = "xml";
        mgr.handleResult(new ActionConfig.Builder("", "", "").build(), new DefaultHttpHeaders().withStatus(SC_OK), obj);

        assertEquals(obj.getBytes().length, mockResponse.getContentLength());
    }

    public void testHandleResultNotModified() throws IOException {

        Mock mockHandlerXml = new Mock(ContentTypeHandler.class);
        mockHandlerXml.matchAndReturn("getExtension", "xml");
        mgr.handlersByExtension.put("xml", (ContentTypeHandler) mockHandlerXml.proxy());
        mgr.handleResult(null, new DefaultHttpHeaders().withStatus(SC_NOT_MODIFIED), new Object());

        assertEquals(0, mockResponse.getContentLength());
    }

    public void testHandlerOverride() {
        Mock mockHandlerXml = new Mock(ContentTypeHandler.class);
        mockHandlerXml.matchAndReturn("getExtension", "xml");
        mockHandlerXml.matchAndReturn("getContentType", "application/xml");
        mockHandlerXml.matchAndReturn("toString", "xml");
        Mock mockHandlerJson = new Mock(ContentTypeHandler.class);
        mockHandlerJson.matchAndReturn("getExtension", "json");
        mockHandlerJson.matchAndReturn("getContentType", "application/javascript");
        mockHandlerJson.matchAndReturn("toString", "json");
        Mock mockHandlerXmlOverride = new Mock(ContentTypeHandler.class);
        mockHandlerXmlOverride.matchAndReturn("getExtension", "xml");
        mockHandlerXmlOverride.matchAndReturn("toString", "xmlOverride");
        mockHandlerXmlOverride.matchAndReturn("getContentType", "application/xml");

        Mock mockContainer = new Mock(Container.class);
        mockContainer.matchAndReturn("getInstance", C.args(C.eq(ContentTypeHandler.class), C.eq("xmlOverride")), mockHandlerXmlOverride.proxy());
        mockContainer.matchAndReturn("getInstance", C.args(C.eq(ContentTypeHandler.class), C.eq("xml")), mockHandlerXml.proxy());
        mockContainer.matchAndReturn("getInstance", C.args(C.eq(ContentTypeHandler.class), C.eq("json")), mockHandlerJson.proxy());
        mockContainer.expectAndReturn("getInstanceNames", C.args(C.eq(ContentTypeHandler.class)), new HashSet(Arrays.asList("xml", "xmlOverride", "json")));

        mockContainer.matchAndReturn("getInstance", C.args(C.eq(String.class),
                C.eq(ContentTypeHandlerManager.STRUTS_REST_HANDLER_OVERRIDE_PREFIX+"xml")), "xmlOverride");
        mockContainer.expectAndReturn("getInstance", C.args(C.eq(String.class),
                C.eq(ContentTypeHandlerManager.STRUTS_REST_HANDLER_OVERRIDE_PREFIX+"json")), null);
        
        DefaultContentTypeHandlerManager mgr = new DefaultContentTypeHandlerManager();
        mgr.setContainer((Container) mockContainer.proxy());

        Map<String,ContentTypeHandler> handlers = mgr.handlersByExtension;
        assertNotNull(handlers);
        assertEquals(2, handlers.size());
        assertEquals(mockHandlerXmlOverride.proxy(), handlers.get("xml"));
        assertEquals(mockHandlerJson.proxy(), handlers.get("json"));
    }

    /** Assert that the request content-type and differ from the response content type */
    public void HandleRequestContentType() throws IOException {

        Mock mockHandlerForm = new Mock(ContentTypeHandler.class);
        mockHandlerForm.matchAndReturn("getExtension", null);
        mockHandlerForm.matchAndReturn("getContentType", "application/x-www-form-urlencoded");
        mockHandlerForm.matchAndReturn("toString", "x-www-form-urlencoded");

        Mock mockHandlerJson = new Mock(ContentTypeHandler.class);
        mockHandlerJson.matchAndReturn("getExtension", "json");
        mockHandlerJson.matchAndReturn("getContentType", "application/javascript");
        mockHandlerJson.matchAndReturn("toString", "json");

        Mock mockContainer = new Mock(Container.class);
        mockContainer.matchAndReturn("getInstance", C.args(C.eq(ContentTypeHandler.class), C.eq("x-www-form-urlencoded")), mockHandlerForm.proxy());
        mockContainer.expectAndReturn("getInstanceNames", C.args(C.eq(ContentTypeHandler.class)), new HashSet(Arrays.asList("x-www-form-urlencoded", "json")));

        mockRequest.setContentType(FormUrlEncodedHandler.CONTENT_TYPE);
        mockRequest.setContent("a=1&b=2".getBytes("UTF-8"));
        ContentTypeHandler handler = mgr.getHandlerForRequest(mockRequest);

        assertEquals("x-www-form-urlencoded", toString());
    }
}