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/*
* Copyright 2002-2007 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.test.web;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import junit.framework.TestCase;
import org.springframework.web.servlet.ModelAndView;
/**
* Convenient base class for tests dealing with Spring web MVC
* {@link org.springframework.web.servlet.ModelAndView} objects.
*
* @author Alef Arendsen
* @author Bram Smeets
* @since 2.0
* @see org.springframework.web.servlet.ModelAndView
*/
public abstract class AbstractModelAndViewTests extends TestCase {
/**
* Assert whether or not a model attribute is available.
*/
protected void assertModelAttributeAvailable(ModelAndView mav, Object key) {
assertNotNull("Model is null", mav.getModel());
assertTrue("Model attribute with name '" + key + "' is not available",
mav.getModel().containsKey(key));
}
/**
* Compare each individual entry in a list, not sorting the lists first.
*/
protected void assertCompareListModelAttribute(ModelAndView mav, Object key, List assertionList) {
List modelList = (List)assertAndReturnModelAttributeOfType(mav, key, List.class);
assertEquals("Size of model list is '" + modelList.size() +
"' while size of assertion list is '" + assertionList.size() + "'",
assertionList.size(), modelList.size());
assertEquals("List in model under key '" + key + "' is not equals to given list", assertionList, modelList);
}
/**
* Compare each individual entry in a list after having sorted both lists
* (optionally using a comparator).
* @param comp the comparator to use. If not specifying the comparator,
* both lists will be sorted not using any comparator.
*/
protected void assertSortAndCompareListModelAttribute(
ModelAndView mav, Object key, List assertionList, Comparator comp) {
List modelList = (List)assertAndReturnModelAttributeOfType(mav, key, List.class);
assertEquals("Size of model list is '" + modelList.size() +
"' while size of assertion list is '" + assertionList.size() + "'",
assertionList.size(), modelList.size());
if (comp != null) {
Collections.sort(modelList, comp);
Collections.sort(assertionList, comp);
}
else {
Collections.sort(modelList);
Collections.sort(assertionList);
}
assertEquals("List in model under key '" + key + "' is not equals to given list", assertionList, modelList);
}
/**
* Checks whether the given model key exists and checks it type, based
* on the given type. If the model entry exists and the type matches,
* the given model value is returned.
*/
protected Object assertAndReturnModelAttributeOfType(ModelAndView mav, Object key, Class type) {
assertNotNull("Model is null", mav.getModel());
assertNotNull("Model attribute with key '" + key + "' is null", mav.getModel().get(key));
Object obj = mav.getModel().get(key);
assertTrue("Model attribute is not of type '" + type.getName() + "' but is a '" +
obj.getClass().getName() + "'", type.isAssignableFrom(obj.getClass()));
return obj;
}
/**
* Check to see if the view name in the ModelAndView matches the given String.
*/
protected void assertViewName(ModelAndView mav, String name) {
assertEquals("View name is not equal to '" + name + "' but was '" + mav.getViewName() + "'",
name, mav.getViewName());
}
/**
* Compare a given Object to the value from the model bound under the given key.
*/
protected void assertModelAttributeValue(ModelAndView mav, Object key, Object value) {
Object modelValue = assertAndReturnModelAttributeOfType(mav, key, Object.class);
assertEquals("Model value with key '" + key + "' is not the same as given value which was '" + value + "'",
value, modelValue);
}
/**
* Inspect the given model to see if all elements in the model appear and are equal
*/
protected void assertModelAttributeValues(ModelAndView mav, Map assertionModel) {
assertNotNull(mav.getModel());
if (!mav.getModel().keySet().equals(assertionModel.keySet())) {
StringBuffer buf = new StringBuffer("Keyset of given model does not match.\n");
appendNonMatchingSetsErrorMessage(assertionModel.keySet(), mav.getModel().keySet(), buf);
fail(buf.toString());
}
StringBuffer buf = new StringBuffer();
Iterator it = mav.getModel().keySet().iterator();
while (it.hasNext()) {
Object key = (Object) it.next();
Object assertionValue = assertionModel.get(key);
Object mavValue = mav.getModel().get(key);
if (!assertionValue.equals(mavValue)) {
buf.append("Value under key '" + key + "' differs, should have been '" +
assertionValue + "' but was '" + mavValue +"'\n");
}
}
if (buf.length() != 0) {
buf.insert(0, "Values of given model do not match.\n");
fail(buf.toString());
}
}
private void appendNonMatchingSetsErrorMessage(Set assertionSet, Set incorrectSet, StringBuffer buf) {
Set tempSet = new HashSet();
tempSet.addAll(incorrectSet);
tempSet.removeAll(assertionSet);
if (tempSet.size() > 0) {
buf.append("Set has too many elements:\n");
Iterator it = tempSet.iterator();
while (it.hasNext()) {
Object o = (Object) it.next();
buf.append('-');
buf.append(o.toString());
buf.append('\n');
}
}
tempSet = new HashSet();
tempSet.addAll(assertionSet);
tempSet.removeAll(incorrectSet);
if (tempSet.size() > 0) {
buf.append("Set is missing elements:\n");
Iterator it = tempSet.iterator();
while (it.hasNext()) {
Object o = (Object) it.next();
buf.append('-');
buf.append(o.toString());
buf.append('\n');
}
}
}
}
