Support net3.5 in RdFramework.Tests

[ulex]

#374 (comment)

It looks like it was removed accidentally.

[ulex]

Compilation fixed in net35-test.rdframework branch, but tests fail with weird exception

Async test method must return an awaitable with a void result when no result is expected

Though the signature of the test method doesn't contain async void.

...
[Test]
public async Task TestAsync()
...

[ForNeVeR]

I'd guess that the problem is that there's no Task type in the .NET Framework 3.5 standard library. So, NUnit is unable to figure out that we use that separate Tasks package, and thus any Task-returning tests fail.

Do we have a lot of such tests in our code?

[ulex]

We have 33 such tests and all located in Reflection part.
The issue is caused by the absence of the GetAwaiter method in the Task type from TPL which we use. I found a workaround to this problem using a type from AsyncBridge , but it smells and makes writing async tests harder db8b20f

I would rather prefer not to include tests for net3.5 for reflection at all (0a8bdb1)

The branch is ready to merge. If you don't have objections I will create a PR.

[ForNeVeR]

I would rather prefer not to include tests for net3.5 for reflection at all

AFAIK, Rd.Reflection is not used in Rd for .NET 3.5. So, this suggestion makes sense.