chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
5008 changed files with 910633 additions and 0 deletions
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+/*
+ * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+ * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); 
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+using System.Collections.Generic;
+using System.Threading;
+using NUnit.Framework;
+using QuantConnect.Util;
+
+namespace QuantConnect.Tests.Common.Util
+{
+    [TestFixture]
+    public class BusyBlockingCollectionTests
+    {
+        [Test]
+        public void IsNotBusyWithZeroItemsWaiting()
+        {
+            using var collection = new BusyBlockingCollection<int>();
+            Assert.IsTrue(collection.WaitHandle.WaitOne(0));
+        }
+
+        [Test]
+        public void IsBusyWithItemsWaiting()
+        {
+            using var collection = new BusyBlockingCollection<int>();
+            collection.Add(1);
+            Assert.IsFalse(collection.WaitHandle.WaitOne(0));
+        }
+
+        [Test]
+        public void GetConsumingEnumerableReturnsItemsInOrder()
+        {
+            using var collection = new BusyBlockingCollection<int>();
+            collection.Add(1);
+            collection.Add(2);
+            collection.Add(3);
+            collection.CompleteAdding();
+            CollectionAssert.AreEquivalent(new[]{1,2,3}, collection.GetConsumingEnumerable());
+        }
+
+        [Test]
+        public void WaitForProcessingCompletedDuringGetConsumingEnumerable()
+        {
+            using var collection = new BusyBlockingCollection<int>();
+            collection.Add(1);
+            collection.Add(2);
+            collection.Add(3);
+            collection.CompleteAdding();
+            Assert.IsFalse(collection.WaitHandle.WaitOne(0));
+            foreach (var item in collection.GetConsumingEnumerable())
+            {
+                Assert.IsFalse(collection.WaitHandle.WaitOne(0));
+            }
+            Assert.IsTrue(collection.WaitHandle.WaitOne(0));
+        }
+    }
+}