[swift-evolution] Potential Bug with Compiler in 2.1.1 and UnitTests

[James Campbell]

I have a class that specifies a initialiser taking any class that
implements the protocol "ChatDatastore"

I can use this fine in the functions for my test cases.

However if I try to initialise it in a member either statically, lazily or
even via a computed variable it shows an error stating "Instance member
'chatDatastore' cannot be used on type 'ChatSessionRowViewModelTests'

Not only is this confusing its plain wrong. I am passing in a Mock which
implements this protocol for the purposes of testing.

This should work yet it seems to think that the initializer takes a totally
different type than specified in the code. It should accept my Mock class
since it implements this protocol yet it complains that I need to give it
an instance of my testing class. Which makes no sense :S

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