Test_Filter()
{
int count = 0;
IFilter< int, int > f
= new Filter< int, int >(
null,
(GetState,Get,Put) => {
if( GetState() == FilterState.NotStarted ) {
return FilterState.Want;
} else if( GetState() == FilterState.Want ) {
Put( Get() );
count++;
return FilterState.Have;
} else if( GetState() == FilterState.Have ) {
if( count >= 3 ) return FilterState.Closed;
return FilterState.Want;
} else {
return FilterState.Closed;
} },
() => {;} );
Assert( f.State == FilterState.Want );
f.Give( 1 );
Assert( f.State == FilterState.Have );
Assert( f.Take() == 1 );
Assert( f.State == FilterState.Want );
f.Give( 2 );
Assert( f.State == FilterState.Have );
Assert( f.Take() == 2 );
Assert( f.State == FilterState.Want );
f.Give( 3 );
Assert( f.State == FilterState.Have );
Assert( f.Take() == 3 );
Assert( f.State == FilterState.Closed );
}