private static ShrinkFunc <List <IExampleSpace <T> > > ShrinkTowardsLength(int length)
{
// If the value type is a collection, that is, this generator is building a "collection of collections",
// it is "less complex" to order the inner collections by descending length. It also lets us find the
// minimal shrink a lot more efficiently in some examples,
// e.g. https://github.com/jlink/shrinking-challenge/blob/main/challenges/large_union_list.md
return(ShrinkFunc.TowardsCountOptimized <IExampleSpace <T>, decimal>(length, exampleSpace =>
{
return -exampleSpace.Current.Distance;
}));
}
public void Snapshots_TowardsCountOptimized()
{
var result = _fixture
.Scenarios
.Select(scenario =>
{
var func = ShrinkFunc.TowardsCountOptimized <int, int>(scenario.MinLength, x => x);
var shrinks = func(scenario.List);
return(new
{
Input = scenario,
Output = shrinks
});
})
.ToList();
Snapshot.Match(result);
}