Polygenix White Paper on Object Substitution
Mock objects are a powerful and flexible mechanism for substituting an imposter as a parameter to the class under test. In many cases, however, the collaborations with the class under test are not parameterized — for example: an attribute that is not supplied to the constructor; objects that are created or referenced via static factories; or new instances of collaborations that are created by the class.
Object Substitution is a technique developed by Polygenix to enable the developer to replace such collaborations with the class under test without modifying the original source code.
The Polygenix staff
Polygenix
March 10, 2003
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