Setup with interpolated strings

[Llujoo]

The following code does not work
moq.Setup(m => m.Get("something[{i}].Name")).Returns($"foo {i}");
I had to use this instead.
moq.Setup(m => m.Get("something[" + i + "].Name")).Returns($"foo {i}");

[stakx]

Are you sure you didn't just miss a $ (see above, you have a regular "..." string instead of $"..." so obviously interpolation wouldn't happen).

[stakx]

The above being said, yes, it seems entirely likely that the workaround might still be needed since you're in an expression tree context. Generally speaking, you shouldn't be including computations in setup expressions that aren't necessary / strictly relevant for that setup.

[stakx]

Yes, m.Get($"something[{i}].Name") is really equivalent to m.Get(string.Format("something[{0}].Name", i)). Unlike m.Get("something[" + i + "].Name"), the former will be lazily evaluated because it involves a function call as the argument. While using $"..." string interpolation should be supported, it'll lead to lazy evaluation, so if i is an iteration variable, for example, by the time your setups get invoked, i will have the final iteration value and that's what the setup(s) will use.

[Llujoo]

Interesting. Thank you for your response.