Move Invoke.Execute's body to new method Case.Execute.  Invoke defers to Case.Execute.
Rename/move/simplify InvokeTests so that it directly tests Case.Execute(...).
Rename test classes under Fixie.Tests/TestClasses to better describe their role and to distinguish Fixie.Tests/TestClasses/CaseTests from Fixie.Tests/CaseTests.
Case objects can be constructed with an optional object[] representing the parameters to be passed to the underlying method.
Support parameterized methods by allowing conventions to yield any number of object[] inputs per discovered MethodInfo.
Rename Fixie.Tests/TestClasses folder to Fixie.Tests/TestMethods because the tests within that folder describe the behavior of different kinds of test methods.
Add "Parameterized" sample convention and test class, using a custom attribute as the source of test method parameters.
Rename test for accuracy.