BothAreNull.java

/**
 * Copyright 2011-2017 Asakusa Framework Team.
 *
 * 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 com.asakusafw.testdriver.rule;

/**
 * Accepts iff both expected and actual value are null.
 * @since 0.2.0
 */
public class BothAreNull implements ValuePredicate<Object> {

    @Override
    public boolean accepts(Object expected, Object actual) {
        return expected == null && actual == null;
    }

    @Override
    public String describeExpected(Object expected, Object actual) {
        if (expected != null) {
            return null;
        }
        return Messages.getString("BothAreNull.message"); //$NON-NLS-1$
    }
}