First of all, your detailed blog post on porting mock frameworks to F# looks really nice. Also, the good news is that we have managed to add the F# style func support to JustMock just as you do it using Rhino or NSubstitute. To consider an example, let's take the following:
let monkey = Mock.Create<IMonkey>()
Mock.Arrange(monkey, fun ignore -> monkey.Echo()).Returns(10).MustBeCalled()
let result = monkey.Echo()
It turns out that you no longer have to do the extra func to lambda conversation for F# while mocking with JustMock.
P.S. This feature is scheduled to be shipped in the next public build to be released soon (this week).
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