Unit test patterns.

Developers who have incorporated unit testing into their development process already know its advantages: cleaner code, courage to refactor, and improved productivity. Writing unit tests is easy; it is writing good tests that makes automated unit testing and test driven development powerful tools. This article provides some basic testing patterns that help write good tests.

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Test doubles.

In automated unit testing, it may be necessary to use objects or procedures that look and behave like their release-intended counterparts, but are actually simplified versions that reduce the complexity and facilitate testing. A test double is a generic (meta) term used for these objects or procedures. Types of test doubles Dummy objects are passed […]

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Mock object.

In object-oriented programming, mock objects are simulated objects that mimic the behavior of real objects in controlled ways. A programmer typically creates a mock object to test the behavior of some other object, in much the same way that a car designer uses a crash test dummy to simulate the dynamic behavior of a human in vehicle impacts.

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