C# 3.0 Implementation of Delay Assignment Example

///<summary>
///Laziestheexpressiontest.
///</summary>
[TestCase]
publicvoidLazyExpressionTest()
{
varlme1=newLazyExpression<int>(()=>2+1);
varlme2=newLazyExpression<int>(()=>1);
(4,Add(lme1,lme2));
}

///<summary>
///Addsthespecifiedx.
///</summary>
///<paramname="x">Thex.</param>
///<paramname="y">They.</param>
///<returns>result</returns>
privateintAdd(LazyExpression<int>x,LazyExpression<int>y)
{
()+();
}

///<summary>
///Laziestheexpressionwithlogic.
///</summary>
[TestCase]
publicvoidLazyExpressionWithLogic()
{
varexp1=newLazyExpression<bool>(()=>true);
varexp2=newLazyExpression<bool>(()=>true||false);
if((exp1,exp2))
{
("lazyand");
}
if((exp1,exp2))
{
("lazyor");
}
}

///<summary>
///Laziesthememoizedexpressiontest.
///</summary>
[TestCase]
publicvoidLazyMemoizedExpressionTest()
{
varlme1=newLazyMemoizedExpression<int>(()=>GetIntResult());
(943,());
(943,());
//output:
//1passed,0failed,0skipped,took2.80seconds(NUnit2.5).
}

///<summary>
///Comparestolazyexpressiontest.
///</summary>
[TestCase]
publicvoidCompareToLazyExpressionTest()
{
varlme1=newLazyExpression<int>(()=>GetIntResult());
(943,());
(943,());
//output:
//1passed,0failed,0skipped,took4.80seconds(NUnit2.5).
}

///<summary>
///Getstheintresult.
///</summary>
///<returns></returns>
privateintGetIntResult()
{
//currentthreadsleeptwosecond.
(2000);
return943;
}