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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().

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()

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

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(...)"