quant1729
55 lines
1.9 KiB
C#
55 lines
1.9 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System.Collections.Generic;
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using System.Linq;
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using NUnit.Framework;
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using QuantConnect.Util;
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namespace QuantConnect.Tests.Common.Util
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{
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[TestFixture]
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public class MemoizingEnumerableTests
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{
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[Test]
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public void EnumeratesList()
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{
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var list = new List<int> {1, 2, 3, 4, 5};
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var memoized = new MemoizingEnumerable<int>(list);
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CollectionAssert.AreEqual(list, memoized);
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}
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[Test]
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public void ChainedMemoizingEnumerables()
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{
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var list = new int [] { 1, 2, 3, 4, 5 };
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var memoized = new MemoizingEnumerable<int>(list);
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var memoized2 = new MemoizingEnumerable<int>(memoized);
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var memoized3 = new MemoizingEnumerable<int>(memoized2);
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CollectionAssert.AreEqual(list, memoized3);
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}
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[Test]
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public void EnumeratesOnce()
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{
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int i = 0;
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var enumerable = Enumerable.Range(0, 10).Select(x => i++);
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var memoized = new MemoizingEnumerable<int>(enumerable);
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// enumerating memoized twice shouldn't matter
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CollectionAssert.AreEqual(memoized.ToList(), memoized.ToList());
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}
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}
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}
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