DRY models

[andrezero]

Why

Our code is verbose because it needs to ensure both typesafe APIs and runtime resolution of values and handling of incomplete inputs

Now that inputs, models, decisions, values, primitives are consolidated we can finally abstract repetition so that

• less tests to maintain (test once, mock elsewhere)
• smaller payload

What

Create abstraction for sets

• explicit set
• range set
• bounded set

Cover abstraction with eaxhaustive tests
Simplify tests for models using it: assert it is called and produced value returned