org.mockito.internal.stubbing.defaultanswers

Class ReturnsSmartNulls

java.lang.Object

org.mockito.internal.stubbing.defaultanswers.ReturnsSmartNulls

All Implemented Interfaces:

Serializable, Answer<Object>

public class ReturnsSmartNulls
extends Object
implements Answer<Object>, Serializable

Optional Answer that can be used with 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 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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ReturnsSmartNulls()

Method Summary

Methods

Modifier and Type	Method and Description
Object	answer(InvocationOnMock invocation)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReturnsSmartNulls

public ReturnsSmartNulls()

Method Detail

answer

public Object answer(InvocationOnMock invocation)
              throws Throwable

Specified by:

answer in interface Answer<Object>

Parameters:

invocation - the invocation on the mock.

Returns:

the value to be returned

Throws:

Throwable - the throwable to be thrown