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
@@ -0,0 +1,94 @@
+/*
+ * 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.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using NUnit.Framework;
+using QuantConnect.Util;
+
+namespace QuantConnect.Tests.Common.Util
+{
+    [TestFixture]
+    public class StreamReaderEnumerableTests
+    {
+        [Test]
+        public void EnumeratesLines()
+        {
+            var lines = Enumerable.Range(0, 10).Select(i => $"line {i}").ToArray();
+            var content = string.Join(Environment.NewLine, lines);
+            using (var streamReader = new StreamReader(new MemoryStream(Encoding.Default.GetBytes(content))))
+            {
+                using var enumerable = new StreamReaderEnumerable(streamReader);
+                var actualLines = enumerable.ToList();
+                CollectionAssert.AreEqual(lines, actualLines);
+            }
+        }
+
+        [Test]
+        public void DisposesWhenEnumerationIsCompleted()
+        {
+            var disposable = new TestDisposable();
+            using var memoryStream = new TestMemoryStream(Encoding.Default.GetBytes("line1\r\nline2\r\nline3"));
+            using var streamReader = new TestStreamReader(memoryStream);
+            using var enumerable = new StreamReaderEnumerable(streamReader, disposable);
+
+            // complete enumeration
+            var lines = enumerable.ToList();
+
+            Assert.IsTrue(streamReader.DisposeCalled);
+            Assert.IsTrue(streamReader.DisposeCalledDisposingValue);
+
+            Assert.IsTrue(memoryStream.DisposeCalled);
+            Assert.IsTrue(memoryStream.DisposeCalledDisposingValue);
+
+            Assert.IsTrue(disposable.DisposeCalled);
+        }
+
+        class TestMemoryStream : MemoryStream
+        {
+            public bool DisposeCalled { get; private set; }
+            public bool DisposeCalledDisposingValue { get; private set; }
+            public TestMemoryStream(byte[] bytes) : base(bytes) { }
+            protected override void Dispose(bool disposing)
+            {
+                base.Dispose(disposing);
+                DisposeCalled = true;
+                DisposeCalledDisposingValue = disposing;
+            }
+        }
+
+        class TestStreamReader : StreamReader
+        {
+            public bool DisposeCalled { get; private set; }
+            public bool DisposeCalledDisposingValue { get; private set; }
+            public TestStreamReader(Stream stream) : base(stream) { }
+            protected override void Dispose(bool disposing)
+            {
+                base.Dispose(disposing);
+                DisposeCalled = true;
+                DisposeCalledDisposingValue = disposing;
+            }
+        }
+
+        class TestDisposable : IDisposable
+        {
+            public bool DisposeCalled { get; private set; }
+            public void Dispose() { DisposeCalled = true; }
+        }
+    }
+}