mcs/class/System.ComponentModel.Composition/Tests/ComponentModelUnitTest/Microsoft/Internal/Collections/ReadOnlyDictionaryDebuggerProxyTests.cs

   1 // -----------------------------------------------------------------------\r
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.\r
   3 // -----------------------------------------------------------------------\r
   4 using System;\r
   5 using System.Collections.Generic;\r
   6 using System.ComponentModel.Composition;\r
   7 using System.UnitTesting;\r
   8 using Microsoft.VisualStudio.TestTools.UnitTesting;\r
   9 \r
  10 namespace Microsoft.Internal.Collections\r
  11 {\r
  12     [TestClass]\r
  13     public class ReadOnlyDictionaryDebuggerProxyTests\r
  14     {\r
  15         [TestMethod]\r
  16         public void Constructor_NullAsDictionaryArgument_ShouldThrowArgumentNull()\r
  17         {\r
  18             ExceptionAssert.ThrowsArgument<ArgumentNullException>("dictionary", () =>\r
  19             {\r
  20                 new ReadOnlyDictionaryDebuggerProxy<string, object>((ReadOnlyDictionary<string, object>)null);\r
  21             });\r
  22         }\r
  23 \r
  24         [TestMethod]\r
  25         public void Constructor_EmptyDictionaryAsDictionaryArgument_ShouldSetItemsPropertyToEmptyEnumerable()\r
  26         {\r
  27             var dictionary = CreateReadOnlyDictionary<string, object>();\r
  28 \r
  29             var proxy = new ReadOnlyDictionaryDebuggerProxy<string, object>(dictionary);\r
  30 \r
  31             EnumerableAssert.IsEmpty(proxy.Items);\r
  32         }\r
  33 \r
  34         [TestMethod]\r
  35         public void Constructor_ValueAsDictionaryArgument_ShouldSetItemsProperty()\r
  36         {\r
  37             var expectations = Expectations.GetMetadata();\r
  38 \r
  39             foreach (var e in expectations)\r
  40             {\r
  41                 var proxy = new ReadOnlyDictionaryDebuggerProxy<string, object>(CreateReadOnlyDictionary(e));\r
  42 \r
  43                 EnumerableAssert.AreEqual(e, proxy.Items);\r
  44             }\r
  45         }\r
  46 \r
  47         [TestMethod]\r
  48         public void Items_ShouldNotCacheUnderlyingItems()\r
  49         {\r
  50             var dictionary = new Dictionary<string, object>();\r
  51             dictionary.Add("Name", "Value");\r
  52 \r
  53             var proxy = new ReadOnlyDictionaryDebuggerProxy<string, object>(CreateReadOnlyDictionary(dictionary));\r
  54 \r
  55             EnumerableAssert.AreEqual(dictionary, proxy.Items);\r
  56 \r
  57             dictionary.Add("AnotherName", "Value");\r
  58 \r
  59             EnumerableAssert.AreEqual(dictionary, proxy.Items);\r
  60 \r
  61             dictionary.Add("AndAnotherName", "Value");\r
  62 \r
  63             EnumerableAssert.AreEqual(dictionary, proxy.Items);\r
  64         }\r
  65 \r
  66         private static ReadOnlyDictionary<TKey, TValue> CreateReadOnlyDictionary<TKey, TValue>()\r
  67         {\r
  68             return CreateReadOnlyDictionary<TKey, TValue>(null);\r
  69         }\r
  70 \r
  71         private static ReadOnlyDictionary<TKey, TValue> CreateReadOnlyDictionary<TKey, TValue>(IDictionary<TKey, TValue> dictionary)\r
  72         {\r
  73             return new ReadOnlyDictionary<TKey, TValue>(dictionary);\r
  74         }\r
  75     }\r
  76 }