dynamic Add(ChainStep name)
{
return new Check(subject, chain, name);
}
static bool StepIndex(Result result, ChainStep step, object[] container, out object next, ref string pathHere)
{
next = null;
if (step.SingleIndex < 0 || step.SingleIndex >= container.Length)
{
result.FailBecause(pathHere + " has length of " + container.Length + ", tried to access index " + step.SingleIndex);
return false;
}
pathHere += "[" + step.SingleIndex + "]";
next = container[step.SingleIndex];
return true;
}
Check(object subject, IEnumerable<ChainStep> oldChain, ChainStep nextItem)
{
this.subject = subject;
chain = new List<ChainStep>(oldChain) { nextItem };
}
static object[] FilterWithNamedPredicate(IEnumerable source, ChainStep step, out string message)
{
string stepMsg = "";
var container = source.Cast<object>().Where(o => step.FilterPredicate.Matches(o, out stepMsg)).ToArray();
message = (string.IsNullOrEmpty(stepMsg))
? ""
: "(Matching: " + stepMsg + ")";
return container;
}
static void ApplyPredicatesToTerminalEnumerable(string path, Result result, IList<INamedPredicate> predicates, ChainStep step)
{
string stepMsg;
var container = FilterWithNamedPredicate((IEnumerable)result.Target, step, out stepMsg);
path += stepMsg;
object target;
switch (step.ListAssertionType)
{
case ListAssertion.Simple:
ApplyPredicatesToSimpleTerminal(path, result, predicates);
break;
case ListAssertion.Single:
if (!StepSingle(result, path, container, out target)) return;
var singleResult = new Result{Target = target};
ApplyPredicatesToSimpleTerminal(path, singleResult, predicates);
result.Merge(singleResult);
break;
case ListAssertion.Index:
if (!StepIndex(result, step, container, out target, ref path)) return;
var indexResult = new Result{Target = target};
ApplyPredicatesToSimpleTerminal(path, indexResult, predicates);
result.Merge(indexResult);
break;
case ListAssertion.All:
CheckAll(result, predicates, path, container);
return;
case ListAssertion.Any:
CheckAny(result, predicates, path, container);
return;
default:
throw new Exception("Unexpected list assertion type");
}
}