public void ToArray_With_ValidData_Collections_Must_Succeed(int[] source)
        {
            // Arrange
            var wrapped = Wrap
                          .AsValueCollection(source);
            var expected =
                System.Linq.Enumerable.ToArray(source);

            // Act
            var result = ValueEnumerable
                         .ToArray <Wrap.ValueCollection <int>, Wrap.Enumerator <int>, int>(wrapped);

            // Assert
            _ = result.Must()
                .BeArrayOf <int>()
                .BeEqualTo(expected);
        }