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;
+using System.Linq;
+using NUnit.Framework;
+using QuantConnect.Lean.Engine.DataFeeds;
+
+namespace QuantConnect.Tests.Engine.DataFeeds
+{
+    [TestFixture]
+    public class CompositeTimeProviderTests
+    {
+        [Test]
+        public void NoProviderGiven()
+        {
+            var compositeTimeProvider = new CompositeTimeProvider(Enumerable.Empty<ITimeProvider>());
+
+            var utcNow = DateTime.UtcNow;
+
+            Assert.LessOrEqual(utcNow, compositeTimeProvider.GetUtcNow());
+        }
+
+        [Test]
+        public void SmallestTime()
+        {
+            var time = new DateTime(1999, 1, 1);
+
+            var timeProvider1 = new ManualTimeProvider();
+            timeProvider1.SetCurrentTimeUtc(time.AddYears(1));
+            var timeProvider2 = new ManualTimeProvider();
+            timeProvider2.SetCurrentTimeUtc(time);
+            var timeProvider3 = new ManualTimeProvider();
+            timeProvider3.SetCurrentTimeUtc(time.AddYears(2));
+
+            var compositeTimeProvider = new CompositeTimeProvider(new[] { timeProvider1 , timeProvider2, timeProvider3 });
+
+            Assert.LessOrEqual(time, compositeTimeProvider.GetUtcNow());
+        }
+    }
+}