| using NUnit.Framework; |
| using System; |
| using Assert = Lucene.Net.TestFramework.Assert; |
| |
| namespace Lucene.Net.Util |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| /// <summary> |
| /// Check large and special graphs. |
| /// </summary> |
| [TestFixture] |
| public class TestRamUsageEstimatorOnWildAnimals : LuceneTestCase |
| { |
| #if FEATURE_STACKOVERFLOWEXCEPTION__ISCATCHABLE // StackOverflowException cannot be caught in .NET Core. This test does not apply. |
| public class ListElement |
| { |
| internal ListElement Next; |
| } |
| |
| [Test] |
| public virtual void TestOverflowMaxChainLength() |
| { |
| int UPPERLIMIT = 100000; |
| int lower = 0; |
| int upper = UPPERLIMIT; |
| |
| while (lower + 1 < upper) |
| { |
| int mid = (lower + upper) / 2; |
| try |
| { |
| ListElement first = new ListElement(); |
| ListElement last = first; |
| for (int i = 0; i < mid; i++) |
| { |
| last = (last.Next = new ListElement()); |
| } |
| RamUsageEstimator.SizeOf(first); // cause SOE or pass. |
| lower = mid; |
| } |
| #pragma warning disable 168 |
| catch (StackOverflowException e) |
| #pragma warning restore 168 |
| { |
| upper = mid; |
| } |
| } |
| |
| if (lower + 1 < UPPERLIMIT) |
| { |
| Assert.Fail("Max object chain length till stack overflow: " + lower); |
| } |
| } |
| #endif |
| } |
| } |