fdf4442163
git-svn-id: file:///srv/devel/repo-conversion/nusu@329 d2e56fa2-650e-0410-a79f-9358c0239efd
670 lines
23 KiB
C#
670 lines
23 KiB
C#
#region CPL License
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/*
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Nuclex Framework
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Copyright (C) 2002-2017 Nuclex Development Labs
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This library is free software; you can redistribute it and/or
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modify it under the terms of the IBM Common Public License as
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published by the IBM Corporation; either version 1.0 of the
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License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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IBM Common Public License for more details.
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You should have received a copy of the IBM Common Public
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License along with this library
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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#if UNITTEST
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using NUnit.Framework;
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namespace Nuclex.Support.Collections {
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/// <summary>Unit Test for the weak collection wrapper</summary>
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[TestFixture]
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internal class WeakCollectionTest {
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#region class Dummy
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/// <summary>Dummy class used to test the weakly referencing collection</summary>
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private class Dummy {
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/// <summary>Initializes a new dummy</summary>
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/// <param name="value">Value that will be stored by the dummy</param>
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public Dummy(int value) {
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this.Value = value;
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}
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/// <summary>
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/// Determines whether the specified System.Object is equal to
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/// the current Dummy object.
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/// </summary>
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/// <param name="otherAsObject">
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/// The System.Object to compare with the current Dummy object
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/// </param>
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/// <returns>
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/// True if the specified System.Object is equal to the current Dummy object;
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/// otherwise, false.
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/// </returns>
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public override bool Equals(object otherAsObject) {
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Dummy other = otherAsObject as Dummy;
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if(other == null) {
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return false;
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}
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return this.Value.Equals(other.Value);
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}
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/// <summary>Serves as a hash function for a particular type.</summary>
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/// <returns>A hash code for the current System.Object.</returns>
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public override int GetHashCode() {
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return this.Value.GetHashCode();
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}
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/// <summary>Some value that can be used for testing</summary>
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public int Value;
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}
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#endregion // class Dummy
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#region class ListWithoutICollection
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private class ListWithoutICollection : IList<WeakReference<Dummy>> {
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public int IndexOf(WeakReference<Dummy> item) { throw new NotImplementedException(); }
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public void Insert(int index, WeakReference<Dummy> item) {
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throw new NotImplementedException();
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}
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public void RemoveAt(int index) { throw new NotImplementedException(); }
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public WeakReference<Dummy> this[int index] {
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get { throw new NotImplementedException(); }
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set { throw new NotImplementedException(); }
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}
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public void Add(WeakReference<Dummy> item) { throw new NotImplementedException(); }
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public void Clear() { throw new NotImplementedException(); }
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public bool Contains(WeakReference<Dummy> item) { throw new NotImplementedException(); }
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public void CopyTo(WeakReference<Dummy>[] array, int arrayIndex) {
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throw new NotImplementedException();
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}
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public int Count { get { return 12345; } }
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public bool IsReadOnly { get { throw new NotImplementedException(); } }
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public bool Remove(WeakReference<Dummy> item) { throw new NotImplementedException(); }
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public IEnumerator<WeakReference<Dummy>> GetEnumerator() {
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throw new NotImplementedException();
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}
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IEnumerator IEnumerable.GetEnumerator() { throw new NotImplementedException(); }
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}
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#endregion // class ListWithoutICollection
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/// <summary>Verifies that the constructor of the weak collection is working</summary>
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[Test]
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public void TestConstructor() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Assert.IsNotNull(dummies);
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}
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/// <summary>
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/// Test whether the non-typesafe Add() method of the weak collection works
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/// </summary>
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[Test]
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public void TestAddAsObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(12345);
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(dummies as IList).Add((object)oneTwoThreeDummy);
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CollectionAssert.Contains(dummies, oneTwoThreeDummy);
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}
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/// <summary>
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/// Test whether the non-typesafe Add() method throws an exception if an object is
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/// added that is not compatible to the collection's item type
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/// </summary>
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[Test]
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public void TestThrowOnAddIncompatibleObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Assert.Throws<ArgumentException>(
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delegate() { (dummies as IList).Add(new object()); }
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);
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}
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/// <summary>
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/// Test whether the generic Add() method of the weak collection works
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/// </summary>
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[Test]
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public void TestAdd() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(12345);
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dummies.Add(oneTwoThreeDummy);
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CollectionAssert.Contains(dummies, oneTwoThreeDummy);
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}
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/// <summary>Tests whether the Clear() method works</summary>
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[Test]
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public void TestClear() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(12345);
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dummies.Add(oneTwoThreeDummy);
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Dummy threeTwoOneDummy = new Dummy(54321);
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dummies.Add(threeTwoOneDummy);
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Assert.AreEqual(2, dummies.Count);
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dummies.Clear();
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Assert.AreEqual(0, dummies.Count);
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}
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/// <summary>Tests whether the Contains() method works</summary>
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[Test]
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public void TestContains() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(12345);
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dummies.Add(oneTwoThreeDummy);
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Dummy threeTwoOneDummy = new Dummy(54321);
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Assert.IsTrue(dummies.Contains(oneTwoThreeDummy));
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Assert.IsFalse(dummies.Contains(threeTwoOneDummy));
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}
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/// <summary>Tests whether the non-typesafe Contains() method works</summary>
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[Test]
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public void TestContainsWithObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(12345);
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dummies.Add(oneTwoThreeDummy);
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Dummy threeTwoOneDummy = new Dummy(54321);
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Assert.IsTrue((dummies as IList).Contains((object)oneTwoThreeDummy));
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Assert.IsFalse((dummies as IList).Contains((object)threeTwoOneDummy));
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}
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/// <summary>
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/// Verifies that the Enumerator of the dummy collection correctly
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/// implements the Reset() method
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/// </summary>
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[Test]
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public void TestEnumeratorReset() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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IEnumerator<Dummy> dummyEnumerator = dummies.GetEnumerator();
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Assert.IsTrue(dummyEnumerator.MoveNext());
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Assert.IsTrue(dummyEnumerator.MoveNext());
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Assert.IsFalse(dummyEnumerator.MoveNext());
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dummyEnumerator.Reset();
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Assert.IsTrue(dummyEnumerator.MoveNext());
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Assert.IsTrue(dummyEnumerator.MoveNext());
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Assert.IsFalse(dummyEnumerator.MoveNext());
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}
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/// <summary>Verifies that the IndexOf() method is working as intended</summary>
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[Test]
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public void TestIndexOf() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Dummy sevenEightNineDummy = new Dummy(789);
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Assert.AreEqual(0, dummies.IndexOf(oneTwoThreeDummy));
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Assert.AreEqual(1, dummies.IndexOf(fourFiveSixDummy));
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Assert.AreEqual(-1, dummies.IndexOf(sevenEightNineDummy));
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}
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/// <summary>
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/// Verifies that the non-typesafe IndexOf() method is working as intended
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/// </summary>
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[Test]
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public void TestIndexOfWithObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Dummy sevenEightNineDummy = new Dummy(789);
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Assert.AreEqual(0, (dummies as IList).IndexOf((object)oneTwoThreeDummy));
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Assert.AreEqual(1, (dummies as IList).IndexOf((object)fourFiveSixDummy));
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Assert.AreEqual(-1, (dummies as IList).IndexOf((object)sevenEightNineDummy));
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}
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/// <summary>
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/// Verifies that an exception is thrown if an incompatible object is passed to
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/// the non-typesafe variant of the IndexOf() method
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/// </summary>
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[Test]
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public void TestThrowOnIndexOfWithIncompatibleObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Assert.Throws<ArgumentException>(
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delegate() { Assert.IsNull((dummies as IList).IndexOf(new object())); }
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);
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}
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/// <summary>Test whether the IndexOf() method can cope with null references</summary>
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[Test]
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public void TestIndexOfNull() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Assert.AreEqual(-1, dummies.IndexOf(null));
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dummies.Add(null);
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Assert.AreEqual(0, dummies.IndexOf(null));
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}
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/// <summary>
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/// Verifies that the CopyTo() method of the weak collection works
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/// </summary>
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[Test]
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public void TestCopyToArray() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Dummy[] inputDummies = new Dummy[] { oneTwoThreeDummy, fourFiveSixDummy };
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Dummy[] outputDummies = new Dummy[dummies.Count];
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dummies.CopyTo(outputDummies, 0);
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CollectionAssert.AreEqual(inputDummies, outputDummies);
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}
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/// <summary>
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/// Verifies that the CopyTo() method of the weak collection throws an exception
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/// if the target array is too small to hold the collection's contents
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/// </summary>
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[Test]
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public void TestThrowOnCopyToTooSmallArray() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Dummy[] outputStrings = new Dummy[dummies.Count - 1];
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Assert.Throws<ArgumentException>(
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delegate() { dummies.CopyTo(outputStrings, 0); }
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);
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}
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/// <summary>
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/// Verifies that the CopyTo() method of the transforming read only collection
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/// works if invoked via the ICollection interface
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/// </summary>
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[Test]
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public void TestCopyToArrayViaICollection() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Dummy[] inputDummies = new Dummy[] { oneTwoThreeDummy, fourFiveSixDummy };
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Dummy[] outputDummies = new Dummy[dummies.Count];
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(dummies as ICollection).CopyTo(outputDummies, 0);
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CollectionAssert.AreEqual(inputDummies, outputDummies);
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}
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/// <summary>
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/// Verifies that the Insert() method correctly shifts items in the collection
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/// </summary>
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[Test]
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public void TestInsert() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Insert(0, fourFiveSixDummy);
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Assert.AreEqual(2, dummies.Count);
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Assert.AreSame(fourFiveSixDummy, dummies[0]);
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Assert.AreSame(oneTwoThreeDummy, dummies[1]);
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}
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/// <summary>
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/// Verifies that the non-typesafe Insert() method correctly shifts items in
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/// the collection
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/// </summary>
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[Test]
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public void TestInsertObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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(dummies as IList).Insert(0, (object)fourFiveSixDummy);
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Assert.AreEqual(2, dummies.Count);
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Assert.AreSame(fourFiveSixDummy, dummies[0]);
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Assert.AreSame(oneTwoThreeDummy, dummies[1]);
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}
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/// <summary>
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/// Verifies that the non-typesafe Insert() method correctly shifts items in
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/// the collection
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/// </summary>
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[Test]
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public void TestThrowOnInsertIncompatibleObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Assert.Throws<ArgumentException>(
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delegate() { (dummies as IList).Insert(0, new object()); }
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);
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}
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/// <summary>
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/// Checks whether the IsFixedSize property of the weak collection returns
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/// the expected result for a weak collection based on a fixed array
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/// </summary>
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[Test]
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public void TestIsFixedSizeViaIList() {
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Dummy oneTwoThreeDummy = new Dummy(123);
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Dummy fourFiveSixDummy = new Dummy(456);
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WeakReference<Dummy>[] dummyReferences = new WeakReference<Dummy>[] {
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new WeakReference<Dummy>(oneTwoThreeDummy),
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new WeakReference<Dummy>(fourFiveSixDummy)
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};
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(dummyReferences);
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Assert.IsTrue((dummies as IList).IsFixedSize);
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}
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/// <summary>
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/// Tests whether the IsReadOnly property of the weak collection works
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/// </summary>
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[Test]
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public void TestIsReadOnly() {
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Dummy oneTwoThreeDummy = new Dummy(123);
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Dummy fourFiveSixDummy = new Dummy(456);
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List<WeakReference<Dummy>> dummyReferences = new List<WeakReference<Dummy>>();
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dummyReferences.Add(new WeakReference<Dummy>(oneTwoThreeDummy));
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dummyReferences.Add(new WeakReference<Dummy>(fourFiveSixDummy));
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ReadOnlyList<WeakReference<Dummy>> readOnlyDummyReferences =
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new ReadOnlyList<WeakReference<Dummy>>(dummyReferences);
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(dummyReferences);
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WeakCollection<Dummy> readOnlydummies = new WeakCollection<Dummy>(
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readOnlyDummyReferences
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);
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Assert.IsFalse(dummies.IsReadOnly);
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Assert.IsTrue(readOnlydummies.IsReadOnly);
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}
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/// <summary>
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/// Tests whether the IsSynchronized property of the weak collection works
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/// </summary>
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[Test]
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public void TestIsSynchronized() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Assert.IsFalse((dummies as IList).IsSynchronized);
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}
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/// <summary>Tests the indexer of the weak collection</summary>
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[Test]
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public void TestIndexer() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Assert.AreSame(oneTwoThreeDummy, dummies[0]);
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Assert.AreSame(fourFiveSixDummy, dummies[1]);
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dummies[0] = fourFiveSixDummy;
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Assert.AreSame(fourFiveSixDummy, dummies[0]);
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}
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/// <summary>Tests the non-typesafe indexer of the weak collection</summary>
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[Test]
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public void TestIndexerWithObject() {
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WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
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new List<WeakReference<Dummy>>()
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);
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Dummy oneTwoThreeDummy = new Dummy(123);
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dummies.Add(oneTwoThreeDummy);
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Dummy fourFiveSixDummy = new Dummy(456);
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dummies.Add(fourFiveSixDummy);
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Assert.AreSame((object)oneTwoThreeDummy, (dummies as IList)[0]);
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Assert.AreSame((object)fourFiveSixDummy, (dummies as IList)[1]);
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(dummies as IList)[0] = (object)fourFiveSixDummy;
|
|
|
|
Assert.AreSame((object)fourFiveSixDummy, (dummies as IList)[0]);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Tests whether the non-typesafe indexer of the weak collection throws
|
|
/// the correct exception if an incompatible object is assigned
|
|
/// </summary>
|
|
[Test]
|
|
public void TestThrowOnIndexerWithIncompatibleObject() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
Dummy oneTwoThreeDummy = new Dummy(123);
|
|
dummies.Add(oneTwoThreeDummy);
|
|
|
|
Assert.Throws<ArgumentException>(
|
|
delegate() { (dummies as IList)[0] = new object(); }
|
|
);
|
|
}
|
|
|
|
/// <summary>Tests the Remove() method of the weak collection</summary>
|
|
[Test]
|
|
public void TestRemove() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
Dummy oneTwoThreeDummy = new Dummy(123);
|
|
dummies.Add(oneTwoThreeDummy);
|
|
Dummy fourFiveSixDummy = new Dummy(456);
|
|
dummies.Add(fourFiveSixDummy);
|
|
|
|
Assert.AreEqual(2, dummies.Count);
|
|
Assert.IsTrue(dummies.Remove(oneTwoThreeDummy));
|
|
Assert.AreEqual(1, dummies.Count);
|
|
Assert.IsFalse(dummies.Remove(oneTwoThreeDummy));
|
|
}
|
|
|
|
/// <summary>Tests the non-typesafe Remove() method of the weak collection</summary>
|
|
[Test]
|
|
public void TestRemoveObject() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
Dummy oneTwoThreeDummy = new Dummy(123);
|
|
dummies.Add(oneTwoThreeDummy);
|
|
Dummy fourFiveSixDummy = new Dummy(456);
|
|
dummies.Add(fourFiveSixDummy);
|
|
|
|
Assert.AreEqual(2, dummies.Count);
|
|
(dummies as IList).Remove((object)oneTwoThreeDummy);
|
|
Assert.AreEqual(1, dummies.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Tests whether a null object can be managed by and removed from the weak collection
|
|
/// </summary>
|
|
[Test]
|
|
public void TestRemoveNull() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
dummies.Add(null);
|
|
|
|
Assert.AreEqual(1, dummies.Count);
|
|
Assert.IsTrue(dummies.Remove(null));
|
|
Assert.AreEqual(0, dummies.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Tests whether the non-typesafe Remove() method of the weak collection throws
|
|
/// an exception if an object is tried to be removed that is incompatible with
|
|
/// the collection's item type
|
|
/// </summary>
|
|
[Test]
|
|
public void TestThrowOnRemoveIncompatibleObject() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
Assert.Throws<ArgumentException>(
|
|
delegate() { (dummies as IList).Remove(new object()); }
|
|
);
|
|
}
|
|
|
|
/// <summary>Tests the RemoveAt() method of the weak collection</summary>
|
|
[Test]
|
|
public void TestRemoveAt() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
Dummy oneTwoThreeDummy = new Dummy(123);
|
|
dummies.Add(oneTwoThreeDummy);
|
|
Dummy fourFiveSixDummy = new Dummy(456);
|
|
dummies.Add(fourFiveSixDummy);
|
|
|
|
Assert.AreSame(oneTwoThreeDummy, dummies[0]);
|
|
dummies.RemoveAt(0);
|
|
Assert.AreSame(fourFiveSixDummy, dummies[0]);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the IsSynchronized property and the SyncRoot property are working
|
|
/// </summary>
|
|
[Test]
|
|
public void TestSynchronization() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new List<WeakReference<Dummy>>()
|
|
);
|
|
|
|
if(!(dummies as ICollection).IsSynchronized) {
|
|
lock((dummies as ICollection).SyncRoot) {
|
|
Assert.AreEqual(0, dummies.Count);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the IsSynchronized property and the SyncRoot property are working
|
|
/// on transforming read only collections based on IList<>s that do not
|
|
/// implement the ICollection interface
|
|
/// </summary>
|
|
[Test]
|
|
public void TestSynchronizationOfIListWithoutICollection() {
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(
|
|
new ListWithoutICollection()
|
|
);
|
|
|
|
if(!(dummies as ICollection).IsSynchronized) {
|
|
lock((dummies as ICollection).SyncRoot) {
|
|
int count = dummies.Count;
|
|
Assert.AreEqual(12345, count); // ;-)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>Tests the RemoveDeadItems() method</summary>
|
|
[Test]
|
|
public void TestRemoveDeadItems() {
|
|
List<WeakReference<Dummy>> dummyReferences = new List<WeakReference<Dummy>>();
|
|
|
|
Dummy oneTwoThreeDummy = new Dummy(123);
|
|
dummyReferences.Add(new WeakReference<Dummy>(oneTwoThreeDummy));
|
|
|
|
dummyReferences.Add(new WeakReference<Dummy>(null));
|
|
|
|
Dummy fourFiveSixDummy = new Dummy(456);
|
|
dummyReferences.Add(new WeakReference<Dummy>(fourFiveSixDummy));
|
|
|
|
WeakCollection<Dummy> dummies = new WeakCollection<Dummy>(dummyReferences);
|
|
|
|
Assert.AreEqual(3, dummies.Count);
|
|
|
|
dummies.RemoveDeadItems();
|
|
|
|
Assert.AreEqual(2, dummies.Count);
|
|
Assert.AreSame(oneTwoThreeDummy, dummies[0]);
|
|
Assert.AreSame(fourFiveSixDummy, dummies[1]);
|
|
}
|
|
|
|
}
|
|
|
|
} // namespace Nuclex.Support.Collections
|
|
|
|
#endif // UNITTEST
|