public NebulaCheck.IGen <Test> ItProducesValuesLikeInt32() =>
from min in Gen.Int16()
from max in Gen.Int16().GreaterThanEqual(min)
from origin in Gen.Int16().Between(min, max)
from bias in DomainGen.Bias()
from seed in DomainGen.Seed()
from size in DomainGen.Size()
select Property.ForThese(() =>
{
public NebulaCheck.IGen <Test> ItShrinksToTheOrigin() =>
from bias in DomainGen.Bias()
from origin in Gen.Int64()
from seed in DomainGen.Seed()
select Property.ForThese(() =>
{
var gen = GalaxyCheck.Gen.Int64().WithBias(bias).ShrinkTowards(origin);
var minimum = gen.Minimum(seed: seed);
minimum.Should().Be(origin);
});
public NebulaCheck.IGen <Test> ItShrinksToTheSinglePredicatedElement() =>
from bias in DomainGen.Bias()
from elementMinimum in Gen.Int32().Between(0, 100)
from seed in DomainGen.Seed()
select Property.ForThese(() =>
{
var gen = GalaxyCheck.Gen.Int32().Between(0, 100).ListOf();
var minimum = gen.Minimum(seed: seed, pred: list => list.Any(element => element >= elementMinimum));
minimum.Should().BeEquivalentTo(elementMinimum);
});
public NebulaCheck.IGen <Test> ItShrinksToTheLocalMinimum_ForANegativeRange() =>
from bias in DomainGen.Bias()
from origin in Gen.Int64().Between(0, -100)
from localMin in Gen.Int64().Between(origin, -200)
from seed in DomainGen.Seed()
select Property.ForThese(() =>
{
var gen = GalaxyCheck.Gen.Int64().WithBias(bias).ShrinkTowards(origin);
var minimum = gen.Minimum(seed: seed, pred: value => value <= localMin);
minimum.Should().Be(localMin);
});
public NebulaCheck.IGen <Test> ItShrinksTheCountToTheLocalMinimumCount() =>
from bias in DomainGen.Bias()
from elementGen in DomainGen.Gen()
from localMinCount in Gen.Int32().Between(0, 5)
from seed in DomainGen.Seed()
select Property.ForThese(() =>
{
var gen = GalaxyCheck.Gen.List(elementGen);
var minimum = gen.Minimum(seed: seed, pred: list => list.Count >= localMinCount);
minimum.Should().HaveCount(localMinCount);
});
public NebulaCheck.IGen <Test> ItShrinksAnyScenarioWithin128Attempts_ForANegativeRange() =>
from bias in DomainGen.Bias().NoShrink()
from localMin in Gen.Int64().Between(0, long.MinValue / 2).NoShrink()
from seed in DomainGen.Seed()
select Property.ForThese(() =>
{
var gen = GalaxyCheck.Gen.Int64().LessThanEqual(0).WithBias(bias);
var minimum = gen.Advanced.MinimumWithMetrics(
seed: seed,
deepMinimum: false,
pred: value => value <= localMin);
minimum.Shrinks.Should().BeLessOrEqualTo(128);
});
public NebulaCheck.IGen <Test> ItShrinksTheCountToTheMinimumCountWhilstShrinkingTheElementsToTheirMinimums() =>
from bias in DomainGen.Bias()
from elementGen in DomainGen.Gen()
from minCount in Gen.Int32().Between(0, 20)
from seed in DomainGen.Seed()
select Property.ForThese(() =>
{
var elementMinimum = elementGen.Minimum(seed: seed);
var gen = GalaxyCheck.Gen.List(elementGen).WithCountGreaterThanEqual(minCount);
var minimum = gen.Minimum(seed: seed);
minimum.Should()
.HaveCount(minCount).And
.AllBeEquivalentTo(elementMinimum);
});