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For clarity, this is a fork of #98, once that's merged this diff should be clearer.
When using the heuristic to optimise the objective function it was doing
so in ignorance of the constraints.
This add the ability to pass a
acceptance_criteria
to both heuristicswhich gives a bound on some measure. In practice it's used in
schedule.heuristic
when an objective function is passed. In this caseit passes the violation counts as an
acceptance_criteria
to ensurethat as each heuristic goes through the search space optimising the
objective function it will only accept a solution if this does not add
any constraint violations.
The modified tests show a good example of this. The objective function
optimisation was giving a schedule that was in fact invalid. This has
now been fixed.