protected override TestFailure ShouldCore(IEnumerable <object> items, ITestMatcher <object> baseMatcher)
{
if (ShouldVerify)
{
if (_max < _min)
{
throw SpecFailure.CardinalityMinGreaterThanMax();
}
if (_min < 0 || _max < 0)
{
throw SpecFailure.NegativeCardinality();
}
}
if (!_min.HasValue && !_max.HasValue)
{
return(null);
}
Predicate <Tally> stopper = null;
if (_max.HasValue)
{
stopper = t => t.Successes > _max;
}
var tally = Tally.New(items, baseMatcher, stopper);
bool outOfRange = (_max.HasValue && tally.Successes > _max.Value) ||
(_min.HasValue && tally.Successes < _min.Value);
if (_outer)
{
outOfRange = !outOfRange;
}
if (outOfRange)
{
string message = Message();
tally.AFailure = TestMatcherLocalizer.FailurePredicate(baseMatcher);
if (tally.AFailure.Message == "")
{
tally.AFailure = null;
message = message.Replace("to:", "items");
}
return(tally.Lift("cardinality", message, true));
}
return(null);
}
