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/*
* Copyright (c) 2007 Mockito contributors
* This program is made available under the terms of the MIT License.
*/
package org.mockito.internal.stubbing.defaultanswers;
import java.io.Serializable;
import java.lang.reflect.Modifier;
import org.mockito.Mockito;
import org.mockito.exceptions.Reporter;
import org.mockito.internal.debugging.LocationImpl;
import org.mockito.invocation.Location;
import org.mockito.internal.util.ObjectMethodsGuru;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/**
* Optional Answer that can be used with
* {@link Mockito#mock(Class, Answer)}
*
* This implementation can be helpful when working with legacy code. Unstubbed
* methods often return null. If your code uses the object returned by an
* unstubbed call you get a NullPointerException. This implementation of
* Answer returns SmartNulls instead of nulls.
* SmartNull gives nicer exception message than NPE because it points out the
* line where unstubbed method was called. You just click on the stack trace.
*
* ReturnsSmartNulls first tries to return ordinary return values (see
* {@link ReturnsMoreEmptyValues}) then it tries to return SmartNull. If the
* return type is not mockable (e.g. final) then ordinary null is returned.
*
* ReturnsSmartNulls will be probably the default return values strategy in
* Mockito 2.0
*/
public class ReturnsSmartNulls implements Answer