public void RRandomElement__SourceHasMoreThanOneElement_And_AllElementsSatisfyPredicate__ReturnsAnElementFromTheSource()
{
var source = new[] { 1, 2, 3 };
// ReSharper disable PossibleInvalidOperationException
CollectionAssert.Contains(source, source.RandomElement(o => true).Value);
// ReSharper restore PossibleInvalidOperationException
}
public void RandomElement__SourceHasOneElement_And_ElementSatisfiesPredicate__ReturnsThatElement()
{
var source = new[] { 1 };
// ReSharper disable PossibleInvalidOperationException
Assert.That(source.RandomElement(o => true).Value, Is.EqualTo(source[0]));
// ReSharper restore PossibleInvalidOperationException
}
public void RandomElement__SourceHasMoreThanOneElement_And_SomeElementsSatisfyPredicate__ReturnsAnElementFromTheSourceThatSatisfyPredicate()
{
var source = new[] { 1, 2, 3 };
var elementsThatSatisfyPredicate = new[] { source[0], source[2] };
// ReSharper disable PossibleInvalidOperationException
CollectionAssert.Contains(elementsThatSatisfyPredicate, source.RandomElement(elementsThatSatisfyPredicate.Contains).Value);
// ReSharper restore PossibleInvalidOperationException
}
public void RandomElement__SourceHasOneElement_And_ElementDoesNotSatisfyPredicate__ReturnsNone()
{
var source = new[] { 1 };
Assert.That(source.RandomElement(o => false).HasValue, Is.False);
}
public void RandomElement__SourceHasMoreThanOneElement_And_AllElementsDoNotSatisfyPredicate__ReturnsNone()
{
var source = new[] { 1, 2, 3 };
Assert.That(source.RandomElement(o => false).HasValue, Is.False);
}
