public void Value()
{
{
var actual = new OrderControlElement <string?>();
actual.Value.IsNull();
actual.Value = "hello world";
actual.Value.Is("hello world");
actual.Value = "tokeiya3";
actual.Value.Is("tokeiya3");
actual.Value = default;
actual.Value.IsNull();
}
{
var actual = new OrderControlElement <string>();
actual.Value.IsNull();
actual.Value = "42";
actual.Value.Is("42");
actual.Value = "114514";
actual.Value.Is("114514");
}
}
public void InitialState()
{
var actual = new OrderControlElement <string>();
actual.Value.Is(default(string));
actual.AheadElement.IsNull();
actual.BehindElement.IsNull();
}
public void MoveToAhead(OrderControlElement <T> pivot)
{
//Remove
AheadElement !.BehindElement = BehindElement;
if (!(BehindElement is null))
{
BehindElement.AheadElement = AheadElement;
}
//Insert
if (!(pivot.AheadElement is null))
{
pivot.AheadElement.BehindElement = this;
}
AheadElement = pivot.AheadElement;
BehindElement = pivot;
pivot.AheadElement = this;
}
public void AddToBehind()
{
var actual = new OrderControlElement <string> {
Value = "42"
};
var pivot = new OrderControlElement <string> {
Value = "114514"
};
actual.AddToBehind(pivot);
pivot.BehindElement.IsSameReferenceAs(actual);
pivot.AheadElement.IsNull();
actual.BehindElement.IsNull();
actual.AheadElement.IsSameReferenceAs(pivot);
var ary = Enumerable.Range(1, 4).Select(i => new OrderControlElement <string> {
Value = i.ToString()
})
.ToArray();
for (int i = 0; i < ary.Length - 1; i++)
{
ary[i].AddToBehind(ary[i + 1]);
}
for (int i = 1; i < ary.Length - 1; i++)
{
ary[i].AheadElement.IsSameReferenceAs(ary[i + 1]);
ary[i].BehindElement.IsSameReferenceAs(ary[i - 1]);
}
ary[0].AheadElement.IsSameReferenceAs(ary[1]);
ary[0].BehindElement.IsNull();
ary[3].AheadElement.IsNull();
ary[3].BehindElement.IsSameReferenceAs(ary[2]);
}
public void AddToBehind(OrderControlElement <T> pivot)
{
pivot.BehindElement = this;
AheadElement = pivot;
}
static void Verify <T>(OrderControlElement <T> ahead, OrderControlElement <T> behind) where T : class
{
ahead.BehindElement.IsSameReferenceAs(behind);
behind.AheadElement.IsSameReferenceAs(ahead);
}