386 lines
13 KiB
C#
386 lines
13 KiB
C#
#region Apache License 2.0
|
|
/*
|
|
Nuclex .NET Framework
|
|
Copyright (C) 2002-2024 Markus Ewald / Nuclex Development Labs
|
|
|
|
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.
|
|
*/
|
|
#endregion // Apache License 2.0
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
|
|
using NUnit.Framework;
|
|
|
|
namespace Nuclex.Support.Collections {
|
|
|
|
/// <summary>Unit tests for the multi dictionary</summary>
|
|
[TestFixture]
|
|
internal class MultiDictionaryTest {
|
|
|
|
/// <summary>
|
|
/// Verifies that new instances of the multi dictionary can be created
|
|
/// </summary>
|
|
[Test]
|
|
public void CanConstructNewDictionary() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
Assert.IsNotNull(dictionary); // nonsense, prevents compiler warning
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the count is initialized correctly when building
|
|
/// a multi dictionary from a dictionary of value collections.
|
|
/// </summary>
|
|
[Test]
|
|
public void CountIsCalculatedIfInitializedFromDictionary() {
|
|
var contents = new Dictionary<int, ICollection<string>>();
|
|
contents.Add(1, new List<string>(new string[] { "one", "eins" }));
|
|
contents.Add(2, new List<string>(new string[] { "two", "zwei" }));
|
|
|
|
var multiDictionary = new MultiDictionary<int, string>(contents);
|
|
Assert.AreEqual(4, multiDictionary.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that a new multi dictionary based on a read-only dictionary is
|
|
/// also read-only
|
|
/// </summary>
|
|
[Test]
|
|
public void IsReadOnlyWhenBasedOnReadOnlyContainer() {
|
|
var readOnly = new ReadOnlyDictionary<int, ICollection<string>>(
|
|
new Dictionary<int, ICollection<string>>()
|
|
);
|
|
var dictionary = new MultiDictionary<int, string>(readOnly);
|
|
|
|
Assert.IsTrue(dictionary.IsReadOnly);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Ensures that the multi dictionary can contain the same key multiple times
|
|
/// (or in other words, multiple values on the same key)
|
|
/// </summary>
|
|
[Test]
|
|
public void CanContainKeyMultipleTimes() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(123, "one two three");
|
|
dictionary.Add(123, "eins zwei drei");
|
|
|
|
Assert.AreEqual(2, dictionary.Count);
|
|
|
|
CollectionAssert.AreEquivalent(
|
|
new KeyValuePair<int, string>[] {
|
|
new KeyValuePair<int, string>(123, "one two three"),
|
|
new KeyValuePair<int, string>(123, "eins zwei drei")
|
|
},
|
|
dictionary
|
|
);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that adding values through the indexer still updates the item count
|
|
/// </summary>
|
|
[Test]
|
|
public void AddingValuesFromIndexerUpdatesCount() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(42, "the answer to everything");
|
|
dictionary[42].Add("21x2");
|
|
|
|
Assert.AreEqual(2, dictionary.Count);
|
|
|
|
CollectionAssert.AreEquivalent(
|
|
new KeyValuePair<int, string>[] {
|
|
new KeyValuePair<int, string>(42, "the answer to everything"),
|
|
new KeyValuePair<int, string>(42, "21x2")
|
|
},
|
|
dictionary
|
|
);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Tests whether the collection can count the number of values stored
|
|
/// under a key
|
|
/// </summary>
|
|
[Test]
|
|
public void ValuesWithSameKeyCanBeCounted() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(20, "twenty");
|
|
dictionary.Add(30, "thirty");
|
|
dictionary.Add(10, "zehn");
|
|
dictionary.Add(20, "zwanzig");
|
|
dictionary.Add(10, "dix");
|
|
|
|
Assert.AreEqual(6, dictionary.Count);
|
|
Assert.AreEqual(3, dictionary.CountValues(10));
|
|
Assert.AreEqual(2, dictionary.CountValues(20));
|
|
Assert.AreEqual(1, dictionary.CountValues(30));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that counting the values of a non-existing key returns 0
|
|
/// </summary>
|
|
[Test]
|
|
public void CountingValuesOfNonExistentKeyReturnsNull() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
Assert.AreEqual(0, dictionary.CountValues(1));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Ensures that its possible to remove values individually without affecting
|
|
/// other values stored under the same key
|
|
/// </summary>
|
|
[Test]
|
|
public void ValuesCanBeRemovedIndividually() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
dictionary.Add(10, "dix");
|
|
|
|
dictionary.Remove(10, "zehn");
|
|
|
|
Assert.AreEqual(2, dictionary.Count);
|
|
CollectionAssert.AreEquivalent(
|
|
new KeyValuePair<int, string>[] {
|
|
new KeyValuePair<int, string>(10, "ten"),
|
|
new KeyValuePair<int, string>(10, "dix")
|
|
},
|
|
dictionary
|
|
);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the Count property returns the number of unique keys if it is called
|
|
/// on the collection-of-collections interface implemented by the multi dictionary
|
|
/// </summary>
|
|
[Test]
|
|
public void CollectionOfCollectionCountIsUniqueKeyCount() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
|
|
Assert.AreEqual(2, dictionary.Count);
|
|
var collectionOfCollections =
|
|
(ICollection<KeyValuePair<int, ICollection<string>>>)dictionary;
|
|
Assert.AreEqual(1, collectionOfCollections.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the multi dictionary can be tested for containment of a specific value
|
|
/// </summary>
|
|
[Test]
|
|
public void ContainmentCanBeTested() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
|
|
Assert.IsTrue(dictionary.Contains(new KeyValuePair<int, string>(10, "ten")));
|
|
Assert.IsTrue(dictionary.Contains(new KeyValuePair<int, string>(10, "zehn")));
|
|
Assert.IsFalse(dictionary.Contains(new KeyValuePair<int, string>(10, "dix")));
|
|
Assert.IsFalse(dictionary.Contains(new KeyValuePair<int, string>(20, "ten")));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the multi dictionary can be tested for containment of a specific key
|
|
/// </summary>
|
|
[Test]
|
|
public void KeyContainmentCanBeTested() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
|
|
Assert.IsTrue(dictionary.ContainsKey(10));
|
|
Assert.IsFalse(dictionary.ContainsKey(20));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the key collection can be retrieved from the dictionary
|
|
/// </summary>
|
|
[Test]
|
|
public void KeyCollectionCanBeRetrieved() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
|
|
ICollection<int> keys = dictionary.Keys;
|
|
Assert.IsNotNull(keys);
|
|
Assert.AreEqual(1, keys.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the key collection can be retrieved from the dictionary
|
|
/// </summary>
|
|
[Test]
|
|
public void ValueCollectionCanBeRetrieved() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
dictionary.Add(20, "twenty");
|
|
|
|
ICollection<string> values = dictionary.Values;
|
|
Assert.IsNotNull(values);
|
|
Assert.AreEqual(3, values.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that TryGetValue() returns false and doesn't throw if a key
|
|
/// is not found in the collection
|
|
/// </summary>
|
|
[Test]
|
|
public void TryGetValueReturnsFalseOnMissingKey() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
ICollection<string> values;
|
|
Assert.IsFalse(dictionary.TryGetValue(123, out values));
|
|
}
|
|
|
|
/// <summary>Verifies that keys can be looked up via TryGetValue()</summary>
|
|
[Test]
|
|
public void TryGetValueCanLookUpValues() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
ICollection<string> values;
|
|
Assert.IsTrue(dictionary.TryGetValue(10, out values));
|
|
Assert.AreEqual(2, values.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that assigning null to a key deletes all the values stored
|
|
/// under it
|
|
/// </summary>
|
|
[Test]
|
|
public void AssigningNullToKeyRemovesAllValues() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
dictionary.Add(20, "twenty");
|
|
|
|
Assert.AreEqual(3, dictionary.Count);
|
|
dictionary[10] = null;
|
|
Assert.AreEqual(1, dictionary.Count);
|
|
Assert.IsFalse(dictionary.ContainsKey(10));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that assigning null to a key deletes all the values stored
|
|
/// under it
|
|
/// </summary>
|
|
[Test]
|
|
public void ValueListCanBeAssignedToNewKey() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary[3] = new List<string>() { "three", "drei" };
|
|
|
|
Assert.AreEqual(2, dictionary.Count);
|
|
Assert.IsTrue(dictionary.Contains(new KeyValuePair<int, string>(3, "three")));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that assigning null to a key deletes all the values stored
|
|
/// under it
|
|
/// </summary>
|
|
[Test]
|
|
public void ValueListCanOverwriteExistingKey() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "dix");
|
|
|
|
Assert.AreEqual(1, dictionary.Count);
|
|
|
|
dictionary[10] = new List<string>() { "ten", "zehn" };
|
|
|
|
Assert.AreEqual(2, dictionary.Count);
|
|
Assert.IsFalse(dictionary.Contains(new KeyValuePair<int, string>(10, "dix")));
|
|
Assert.IsTrue(dictionary.Contains(new KeyValuePair<int, string>(10, "ten")));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that nothing bad happens when a key is removed from the dictionary
|
|
/// that it doesn't contain
|
|
/// </summary>
|
|
[Test]
|
|
public void NonExistingKeyCanBeRemoved() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
Assert.AreEqual(0, dictionary.RemoveKey(123));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the remove method returns the number of values that have
|
|
/// been removed from the dictionary
|
|
/// </summary>
|
|
[Test]
|
|
public void RemoveReturnsNumberOfValuesRemoved() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
Assert.AreEqual(2, dictionary.RemoveKey(10));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the dictionary becomes empty after clearing it
|
|
/// </summary>
|
|
[Test]
|
|
public void DictionaryIsEmptyAfterClear() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(10, "ten");
|
|
dictionary.Add(10, "zehn");
|
|
dictionary.Add(20, "twenty");
|
|
Assert.AreEqual(3, dictionary.Count);
|
|
dictionary.Clear();
|
|
Assert.AreEqual(0, dictionary.Count);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that non-existing values can be removed from the dictionary
|
|
/// </summary>
|
|
[Test]
|
|
public void NonExistingValueCanBeRemoved() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
Assert.IsFalse(dictionary.Remove(123, "test"));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that nothing bad happens when the last value under a key is removed
|
|
/// </summary>
|
|
[Test]
|
|
public void LastValueOfKeyCanBeRemoved() {
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
dictionary.Add(123, "test");
|
|
dictionary.Remove(123, "test");
|
|
Assert.AreEqual(0, dictionary.CountValues(123));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the dictionary can be copied into an array
|
|
/// </summary>
|
|
[Test]
|
|
public void DictionaryCanBeCopiedIntoArray() {
|
|
var expected = new List<KeyValuePair<int, string>>() {
|
|
new KeyValuePair<int, string>(1, "one"),
|
|
new KeyValuePair<int, string>(1, "eins"),
|
|
new KeyValuePair<int, string>(2, "two"),
|
|
new KeyValuePair<int, string>(2, "zwei")
|
|
};
|
|
|
|
var dictionary = new MultiDictionary<int, string>();
|
|
foreach(KeyValuePair<int, string> entry in expected) {
|
|
dictionary.Add(entry.Key, entry.Value);
|
|
}
|
|
|
|
var actual = new KeyValuePair<int, string>[4];
|
|
dictionary.CopyTo(actual, 0);
|
|
|
|
CollectionAssert.AreEquivalent(expected, actual);
|
|
}
|
|
|
|
}
|
|
|
|
} // namespace Nuclex.Support.Collections
|