public void Reset_MustNotSupportedException_Ok()
{
// Данные для теста
var items = TreeItemHelper.Generate_ForDisposeTest();
// Подсчёт вызовов
var counter = new Counter();
// Тестовые итераторы
var head = new CustomEnumerable(items.Where(a => a.ParentId == 0), counter); // 1 call = 1 disposing
IEnumerable <TreeItem> GetChildren(TreeItem item) => new CustomEnumerable(items.Where(a => a.ParentId == item.Id).OrderBy(a => a.Id), counter); // 4 elements = 5 calls = 5 disposing (try get subelements at Id=5)
// Шаблон формирования дерева с использованием итератора с контекстом
using (var enumerator = new TreeEnumerator <TreeItem>(head, GetChildren))
{
int i = 0;
while (enumerator.MoveNext())
{
// i = 0 - current=head
// i = 1 - current=sub 1 head 1
// i = 2 - current=sub 1 head 2
// i = 3 - current=sub 1 head 3
// i = 4 - current=sub 1 head 4
if (i == 4)
{
// enumerator has stack with 5 elements
Assert.Throws <NotSupportedException>(() => enumerator.Reset());
break;
}
i++;
}
}
}
public void Dispose_MustBeExecuting_Ok()
{
// Данные для теста
var items = TreeItemHelper.Generate_ForDisposeTest();
// Подсчёт вызовов
var counter = new Counter();
// Тестовые итераторы
var head = new CustomEnumerable(items.Where(a => a.ParentId == 0), counter); // 1 call = 1 disposing
IEnumerable <TreeItem> GetChildren(TreeItem item) => new CustomEnumerable(items.Where(a => a.ParentId == item.Id).OrderBy(a => a.Id), counter); // 4 elements = 5 calls = 5 disposing (try get subelements at Id=5)
// Шаблон формирования дерева с использованием итератора с контекстом
using (var enumerator = new TreeEnumerator <TreeItem>(head, GetChildren))
{
while (enumerator.MoveNext())
{
}
}
// total 6 calls
Assert.Equal(6, counter.DisposeCount);
}
public override async Task MatchAsync(HttpContext httpContext, IEndpointFeature feature)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (feature == null)
{
throw new ArgumentNullException(nameof(feature));
}
var values = new RouteValueDictionary();
feature.Values = values;
var cache = _cache.Value;
for (var i = 0; i < cache.Length; i++)
{
var tree = cache[i];
var tokenizer = new PathTokenizer(httpContext.Request.Path);
var treenumerator = new TreeEnumerator(tree.Root, tokenizer);
while (treenumerator.MoveNext())
{
var node = treenumerator.Current;
foreach (var item in node.Matches)
{
var entry = item.Entry;
var matcher = item.TemplateMatcher;
values.Clear();
if (!matcher.TryMatch(httpContext.Request.Path, values))
{
continue;
}
Log.MatchedTemplate(_logger, httpContext, entry.RouteTemplate);
if (!MatchConstraints(httpContext, values, entry.Constraints))
{
continue;
}
await SelectEndpointAsync(httpContext, feature, (MatcherEndpoint[])entry.Tag);
if (feature.Endpoint != null)
{
if (feature.Endpoint is MatcherEndpoint endpoint)
{
foreach (var kvp in endpoint.Values)
{
if (!feature.Values.ContainsKey(kvp.Key))
{
feature.Values[kvp.Key] = kvp.Value;
}
}
}
return;
}
}
}
}
}
public async Task RouteAsync(RouteContext context)
{
foreach (var tree in _trees)
{
var tokenizer = new PathTokenizer(context.HttpContext.Request.Path);
var root = tree.Root;
var treeEnumerator = new TreeEnumerator(root, tokenizer);
// Create a snapshot before processing the route. We'll restore this snapshot before running each
// to restore the state. This is likely an "empty" snapshot, which doesn't allocate.
var snapshot = context.RouteData.PushState(router: null, values: null, dataTokens: null);
while (treeEnumerator.MoveNext())
{
var node = treeEnumerator.Current;
foreach (var item in node.Matches)
{
var entry = item.Entry;
var matcher = item.TemplateMatcher;
try
{
if (!matcher.TryMatch(context.HttpContext.Request.Path, context.RouteData.Values))
{
continue;
}
if (!RouteConstraintMatcher.Match(
entry.Constraints,
context.RouteData.Values,
context.HttpContext,
this,
RouteDirection.IncomingRequest,
_constraintLogger))
{
continue;
}
Log.RequestMatchedRoute(_logger, entry.RouteName, entry.RouteTemplate.TemplateText);
context.RouteData.Routers.Add(entry.Handler);
await entry.Handler.RouteAsync(context);
if (context.Handler != null)
{
return;
}
}
finally
{
if (context.Handler == null)
{
// Restore the original values to prevent polluting the route data.
snapshot.Restore();
}
}
}
}
}
}