Nah, it was some corporate project. But if you are interested, I could rewrite it. It would be a fun weekend project.

It's also worth figuring out for yourself though! They're suprisingly easy to use (look up Expression<>).

It's incredibly useful once you know how, and encourages you to stop using reflection, passing magic strings as arguments, or having to use nameof().

FWIW, in Python, this is pytest’s entire thing (although it ends up grovelling into bytecode to achieve that).

Not quite the same, but available on nuget- 'fluentAssertions' gives you something akin to this. I've had decent success with having our juniors use it vs less verbose assertion libraries. I don't know about evaluating individual expressions in a line separately, but it does give you clean syntax and similar error messages that are very readable-

"GetProductPage().GetProductPrice().Should().Be().LessThan(...)"

https://stackoverflow.com/a/700325 to write out the internal structure of a LambdaExpression.

If you just want the assignments then it's simpler:

Add to the Evaluate method a test for MemberExpression and then:

The variable name is:

((MemberExpression)expr).Member.Name

The value is:

Expression.Lambda(expr).Compile().DynamicInvoke()