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Unitils provides utilities to further simplify unit-testing with JUnit, DBUnit, EasyMock Hibernate and Spring. The goal is to make unit-testing easy and maintainable by offering utilities such as automatic DB-schema maintainance and equality assertion through reflection.

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/*
 * Copyright 2006-2007,  Unitils.org
 *
 * 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.unitils.easymock.util;

import org.easymock.internal.matchers.Equals;
import org.unitils.reflectionassert.ReflectionComparator;
import org.unitils.reflectionassert.ReflectionComparatorFactory;
import org.unitils.reflectionassert.ReflectionComparatorMode;


/**
 * An easy mock argument matcher to check whether 2 objects are equal by comparing all fields of the objects using
 * reflection.
 * 
 * The (combination of) comparator modes specify how strict the comparison must be:

 * ignore defaults: compare only arguments (and inner values) that have a non default value (eg null) as exepected value
 * lenient dates: do not compare actual date values, just that they both have a value or not
 * lenient order: order is not important when comparing collections or arrays
 * 
 *
 * @author Tim Ducheyne
 * @author Filip Neven
 * @see ReflectionComparator
 * @see ReflectionComparatorMode
 */
public class ReflectionArgumentMatcher extends Equals {


    /* The comparator for lenient comparing expected and actual argument values */
    private ReflectionComparator reflectionComparator;


    /**
     * Creates a matcher for the expected argument value.
     * The modes specify how to compare the expected value with the actual value.
     *
     * @param expected the argument value, not null
     * @param modes    the comparator modes
     */
    public ReflectionArgumentMatcher(T expected, ReflectionComparatorMode... modes) {
        super(expected);
        this.reflectionComparator = ReflectionComparatorFactory.createRefectionComparator(modes);
    }


    /**
     * Checks whether the given actual value is equal to the expected value.
     * A reflection comparator is used to compare both values. The modes determine how
     * strict this comparison will be.
     * 
     * An assertion error is thrown if expected and actual did not match. This way, a more
     * detailed message can be provided.
     *
     * @param actual the actual argument value
     * @return true
     * @throws AssertionError in case expected and actual did not match
     */
    @Override
    public boolean matches(Object actual) {
        return reflectionComparator.isEqual(getExpected(), actual);
    }


}