Make testing of evaluation easier by providing testing helpers that load up the IR from resource files and on disk.

[DamianReeves]

Feature Request

Description of Problem:

...what problem are you trying to solve that the project doesn't currently solve?

...please resist the temptation to describe your request in terms of a solution. Job Story form ("When [triggering condition], I want to [motivation/goal], so I can [outcome].") can help ensure you're expressing a problem statement.

Potential Solutions:

...clearly and concisely describe what you want to happen. Add any considered drawbacks.

... if you've considered alternatives, clearly and concisely describe those too.