With ReSharper installed, there is an extension called "TestCop" which allows you to generate (or else navigate to) a test class by hitting Ctrl-G Ctrl-T
. The naming conventions for your test assembly and test class are configurable. So, for example, you can have your test assembly be the name of your assembly under test plus ".Test" and your test classes be the name of your class under test plus a "Spec" suffix.
I can highly recommend it!