In summary, someone please fix NUnit to support async task methods.
Pros: Best IDE experience for VS2010 and earlier (VS 2012 supports MSTest and other frameworks equally).
Cons: It requires an expensive product to develop and run. ExpectedExceptionAttribute considered harmful.
Pros: Supports Fluent syntax. Attributes can specify that tests require STA, MTA, etc.
Cons: No support for “async Task”. Reuses test class instance for all tests within that class.
Pros: Very few attributes keeps it simple. Straightforward use of constructors and Dispose methods to wrap tests.
Cons: Assert.Equals doesn’t allow accepting a formattable message to provide a more useful failure message. No Assert.Inconclusive.