public void When_creating_a_completed_task_from_null_value()
        {
            const string SOURCE = null;

            var task = SOURCE.ToCompletedValueTask();

            task.IsCompleted.ShouldBeTrue();
            task.IsCompletedSuccessfully.ShouldBeTrue();

            task.Result.ShouldBe(SOURCE);
        }
        public void When_creating_a_completed_task_from_reference_type()
        {
            const string SOURCE = "some-text";

            var task = SOURCE.ToCompletedValueTask();

            task.IsCompleted.ShouldBeTrue();
            task.IsCompletedSuccessfully.ShouldBeTrue();

            task.Result.ShouldBe(SOURCE);
        }