public void FirstOrDefault_With_ValidData_Must_Succeed(int[] source)
{
// Arrange
var wrapped = Wrap
.AsValueEnumerable(source);
var expected =
System.Linq.Enumerable.FirstOrDefault(source);
// Act
var result = ValueEnumerable
.FirstOrDefault <Wrap.ValueEnumerable <int>, Wrap.Enumerator <int>, int>(wrapped);
// Assert
_ = result.Must()
.BeEqualTo(expected);
}