/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.web.servlet.mvc.method.annotation;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.springframework.core.MethodParameter;
import org.springframework.mock.web.test.MockHttpServletRequest;
import org.springframework.tests.sample.beans.TestBean;
import org.springframework.ui.ExtendedModelMap;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.method.support.ModelAndViewContainer;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.annotation.ModelAndViewResolver;
import static org.junit.Assert.*;
/**
* Test fixture with {@link ModelAndViewResolverMethodReturnValueHandler}.
*
* @author Rossen Stoyanchev
*/
public class ModelAndViewResolverMethodReturnValueHandlerTests {
private ModelAndViewResolverMethodReturnValueHandler handler;
private List<ModelAndViewResolver> mavResolvers;
private ModelAndViewContainer mavContainer;
private ServletWebRequest request;
@Before
public void setUp() {
mavResolvers = new ArrayList<ModelAndViewResolver>();
handler = new ModelAndViewResolverMethodReturnValueHandler(mavResolvers);
mavContainer = new ModelAndViewContainer();
request = new ServletWebRequest(new MockHttpServletRequest());
}
@Test
public void modelAndViewResolver() throws Exception {
MethodParameter returnType = new MethodParameter(getClass().getDeclaredMethod("testBeanReturnValue"), -1);
mavResolvers.add(new TestModelAndViewResolver(TestBean.class));
TestBean testBean = new TestBean("name");
handler.handleReturnValue(testBean, returnType, mavContainer, request);
assertEquals("viewName", mavContainer.getViewName());
assertSame(testBean, mavContainer.getModel().get("modelAttrName"));
assertFalse(mavContainer.isRequestHandled());
}
@Test(expected=UnsupportedOperationException.class)
public void modelAndViewResolverUnresolved() throws Exception {
MethodParameter returnType = new MethodParameter(getClass().getDeclaredMethod("intReturnValue"), -1);
mavResolvers.add(new TestModelAndViewResolver(TestBean.class));
handler.handleReturnValue(99, returnType, mavContainer, request);
}
@Test
public void handleNull() throws Exception {
MethodParameter returnType = new MethodParameter(getClass().getDeclaredMethod("testBeanReturnValue"), -1);
handler.handleReturnValue(null, returnType, mavContainer, request);
assertNull(mavContainer.getView());
assertNull(mavContainer.getViewName());
assertTrue(mavContainer.getModel().isEmpty());
}
@Test(expected=UnsupportedOperationException.class)
public void handleSimpleType() throws Exception {
MethodParameter returnType = new MethodParameter(getClass().getDeclaredMethod("intReturnValue"), -1);
handler.handleReturnValue(55, returnType, mavContainer, request);
}
@Test
public void handleNonSimpleType() throws Exception{
MethodParameter returnType = new MethodParameter(getClass().getDeclaredMethod("testBeanReturnValue"), -1);
handler.handleReturnValue(new TestBean(), returnType, mavContainer, request);
assertTrue(mavContainer.containsAttribute("testBean"));
}
@SuppressWarnings("unused")
private int intReturnValue() {
return 0;
}
@SuppressWarnings("unused")
private TestBean testBeanReturnValue() {
return null;
}
private static class TestModelAndViewResolver implements ModelAndViewResolver {
private Class<?> returnValueType;
public TestModelAndViewResolver(Class<?> returnValueType) {
this.returnValueType = returnValueType;
}
@Override
@SuppressWarnings("rawtypes")
public ModelAndView resolveModelAndView(Method method, Class handlerType, Object returnValue,
ExtendedModelMap model, NativeWebRequest request) {
if (returnValue != null && returnValue.getClass().equals(returnValueType)) {
return new ModelAndView("viewName", "modelAttrName", returnValue);
}
else {
return ModelAndViewResolver.UNRESOLVED;
}
}
}
}