public static void IsNullOrEmpty_NonGeneric_Returns_False_If_Source_Is_Not_Empty()
{
IEnumerable source = XEnumerable.Unit(42).ForbidMultipleEnumeration();
bool result = source.IsNullOrEmpty();
result.Should().BeFalse();
}
public void Unit_Returns_Sequence_With_Single_Element()
{
var result = XEnumerable.Unit(42);
(result as ICollection).Should().BeNull("Sequence should not be a collection");
result.Should().HaveCount(1);
}
public void SingleOrDefault_Returns_Single_Element_If_Sequence_Has_One_Element()
{
var source = XEnumerable.Unit(1).ForbidMultipleEnumeration();
source.SingleOrDefault(42).Should().Be(1);
}
public void None_Returns_False_If_Source_Is_Not_Empty()
{
IEnumerable <int> source = XEnumerable.Unit(42).ForbidMultipleEnumeration();
source.None().Should().BeFalse();
}
