How Pex Will Help You

If you want to ...

• ... write parameterized unit tests
• you can use Pex in Visual Studio,
• ... test an existing code base,
• The Pex Wizard gets you started by generating a set of parameterized unit tests templates and parameterized mocks. Parameterized tests are not executable by themselves, but Pex will generate traditional tests from them. You can refine the templates by adding customer scenarios and validation code.
• ... leverage an existing test suite,
• You can let Pex run your unit tests and inject faults at various places and times.

Writing Parameterized Unit Tests

When you are ready to write your own parameterized unit tests, we will show you how depending on the code you want to test:

• Algorithms over primitive data, arrays of primitive data
• Write parameterized unit tests. more...
• Algorithms over interfaces
• Use Pex' automatic mock object generation. more...
• Algorithms over complex data, e.g. compiler
• Let Pex generate an abstract representation of the data first, then feed it to the algorithm. more...
• Let Pex build instances via custom object creation and data invariants, then invoke algorithm. more...
• Data containers
• Write parameterized unit tests. more...
• Let Pex build instances via custom object creation and data invariants, then invoke a method of the container, and check invariants afterwards again. more...
• Write parameterized unit tests which call different methods of the implementation depending on the parameter values. more...
• Client / Server Architectures in a public environment, e.g. web service client, web service server
• Generate interfaces for web services. more...
• Use Pex' mock objects to simulate other side. more...