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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.Collections;
using System.Collections.Generic;
using System.UnitTesting;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace Microsoft.Internal.Collections
{
[TestClass]
public class ReadOnlyDictionaryTests
{
[TestMethod]
public void Constructor_NullAsDictionaryArgument_ShouldCreateEmptyDictionary()
{
var dictionary = new ReadOnlyDictionary<string, object>(null);
EnumerableAssert.IsEmpty(dictionary);
}
[TestMethod]
public void Constructor_WritableDictionaryAsDictionaryArgument_ShouldPopulateCollection()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = new ReadOnlyDictionary<string, object>(dictionary);
EnumerableAssert.AreEqual(dictionary, readOnlyDictionary);
}
[TestMethod]
public void Add1_ShouldThrowNotSupported()
{
var dictionary = GetReadOnlyDictionaryWithData();
ExceptionAssert.Throws<NotSupportedException>(() =>
{
dictionary.Add(new KeyValuePair<string, object>("Key", "Value"));
});
}
[TestMethod]
public void Add2_ShouldThrowNotSupported()
{
var dictionary = GetReadOnlyDictionaryWithData();
ExceptionAssert.Throws<NotSupportedException>(() =>
{
dictionary.Add("Key", "Value");
});
}
[TestMethod]
public void Clear_ShouldThrowNotSupported()
{
var dictionary = GetReadOnlyDictionaryWithData();
ExceptionAssert.Throws<NotSupportedException>(() =>
{
dictionary.Clear();
});
}
[TestMethod]
public void Remove1_ShouldThrowNotSupported()
{
var dictionary = GetReadOnlyDictionaryWithData();
ExceptionAssert.Throws<NotSupportedException>(() =>
{
dictionary.Remove("Value");
});
}
[TestMethod]
public void Remove2_ShouldThrowNotSupported()
{
var dictionary = GetReadOnlyDictionaryWithData();
ExceptionAssert.Throws<NotSupportedException>(() =>
{
dictionary.Remove(new KeyValuePair<string, object>("Key", "Value"));
});
}
[TestMethod]
public void ItemSet_ShouldThrowNotSupported()
{
var dictionary = GetReadOnlyDictionaryWithData();
ExceptionAssert.Throws<NotSupportedException>(() =>
{
dictionary["Key"] = "Value";
});
}
[TestMethod]
public void Keys_ShouldReturnWrappedDictionaryKeys()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
EnumerableAssert.AreEqual(readOnlyDictionary.Keys, dictionary.Keys);
}
[TestMethod]
public void Values_ShouldReturnWrappedDictionaryValues()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
EnumerableAssert.AreEqual(readOnlyDictionary.Values, readOnlyDictionary.Values);
}
[TestMethod]
public void IsReadOnly_ShouldAlwaysBeTrue()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
Assert.IsFalse(dictionary.IsReadOnly);
Assert.IsTrue(readOnlyDictionary.IsReadOnly);
}
[TestMethod]
public void Count_ShouldReturnWrappedDictionaryCount()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
Assert.AreEqual(dictionary.Count, readOnlyDictionary.Count);
}
[TestMethod]
public void ContainsKey()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
Assert.IsTrue(readOnlyDictionary.ContainsKey("Key1"));
Assert.IsFalse(readOnlyDictionary.ContainsKey("InvalidKey"));
}
[TestMethod]
public void Contains()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
Assert.IsTrue(readOnlyDictionary.Contains(new KeyValuePair<string,object>("Key1", "Value1")));
Assert.IsFalse(readOnlyDictionary.Contains(new KeyValuePair<string,object>("InvalidKey", "Value1")));
Assert.IsFalse(readOnlyDictionary.Contains(new KeyValuePair<string,object>("Key1", "InvalidValue")));
}
[TestMethod]
public void CopyTo()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
KeyValuePair<string, object>[] destination = new KeyValuePair<string, object> [readOnlyDictionary.Count];
readOnlyDictionary.CopyTo(destination, 0);
EnumerableAssert.AreEqual(readOnlyDictionary, destination);
}
[TestMethod]
public void GetEnumerator()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
IEnumerable<KeyValuePair<string, object>> genericEnumerable = readOnlyDictionary;
EnumerableAssert.AreEqual(genericEnumerable, dictionary);
IEnumerable weakEnumerable = (IEnumerable)readOnlyDictionary;
EnumerableAssert.AreEqual(weakEnumerable, dictionary);
}
[TestMethod]
public void Item()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
Assert.AreEqual("Value1", readOnlyDictionary["Key1"], "Expecting to read wrapped value");
}
[TestMethod]
public void TryGetValue()
{
var dictionary = GetWritableDictionaryWithData();
var readOnlyDictionary = GetReadOnlyDictionary(dictionary);
object result;
bool ret = readOnlyDictionary.TryGetValue("Key1", out result);
Assert.IsTrue(ret, "Expecting TryGetExportedValue to return true for wrapped key");
Assert.AreEqual("Value1", result, "Expecting TryGetExportedValue to return wrapped value");
}
private static IDictionary<String, object> GetReadOnlyDictionaryWithData()
{
return GetReadOnlyDictionary(GetWritableDictionaryWithData());
}
private static IDictionary<TKey, TValue> GetReadOnlyDictionary<TKey, TValue>(IDictionary<TKey, TValue> dictionary)
{
return new ReadOnlyDictionary<TKey, TValue>(dictionary);
}
private static IDictionary<String, object> GetWritableDictionaryWithData()
{
IDictionary<String, object> dictionary = new Dictionary<String, object>();
dictionary.Add("Key1", "Value1");
dictionary.Add("Key2", 42);
return dictionary;
}
}
}
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