Package org.jmock.core.constraint

Class IsNull

java.lang.Object

org.jmock.core.constraint.IsNull

All Implemented Interfaces:

Constraint, SelfDescribing

public class IsNull
extends java.lang.Object
implements Constraint

Is the value null?

Constructor Summary

Constructors

Constructor	Description
IsNull()

Method Summary

Modifier and Type	Method	Description
java.lang.StringBuffer	describeTo(java.lang.StringBuffer buffer)	Appends the description of this object to the buffer.
boolean	eval(java.lang.Object o)	Evaluates the constraint for argument o.

Methods inherited from class java.lang.Object

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

Constructor Detail

IsNull

public IsNull()

Method Detail

eval

public boolean eval(java.lang.Object o)

Description copied from interface: Constraint

Evaluates the constraint for argument o.

Specified by:

eval in interface Constraint

Parameters:

o - the object against which the constraint is evaluated.

Returns:

true if o meets the constraint, false if it does not.

describeTo

public java.lang.StringBuffer describeTo(java.lang.StringBuffer buffer)

Description copied from interface: SelfDescribing

Appends the description of this object to the buffer.

Specified by:

describeTo in interface SelfDescribing

Parameters:

buffer - The buffer that the description is appended to.

Returns:

The buffer passed to the invokedMethod.