issame.java

不管是测试驱动开发或者是其它的开发模式

/*  Copyright (c) 2000-2004 jMock.org
 */
package org.jmock.core.constraint;

import org.jmock.core.Constraint;


/**
 * Is the value the same object as another value?
 */
public class IsSame implements Constraint
{
    private Object object;

    /**
     * Creates a new instance of IsSame
     *
     * @param object The predicate evaluates to true only when the argument is
     *               this object.
     */
    public IsSame( Object object ) {
        this.object = object;
    }

    public boolean eval( Object arg ) {
        return arg == object;
    }

    public StringBuffer describeTo( StringBuffer buffer ) {
        buffer.append("same(");
        if (object == null) {
            buffer.append("null");
        } else {
            buffer.append("<");
            buffer.append(object);
            buffer.append(">");
        }
        buffer.append(")");

        return buffer;
    }
}