Added file dictionaries from mockaroo and briandunning.com

Author: mwhelan

NTestDataBuilder.Tests/DataSources/Dictionaries/CacheTests.cs

@@ -1,15 +1,62 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
+using NTestDataBuilder.DataSources.Dictionaries;
+using Shouldly;
+using Xunit;
 
 namespace NTestDataBuilder.Tests.DataSources.Dictionaries
 {
-    public class CacheTests
+    public class CacheTests : IDisposable
     {
         public CacheTests()
         {
-            Cache.Clear()
+            Cache.Clear();
+        }
+
+        [Fact]
+        public void WhenRequestingAnItemNotInTheCache_ThenReturnsNull()
+        {
+            Cache.Get("SomethingThatDoesNotExist").ShouldBe(null);
+        }
+
+        [Fact]
+        public void WhenAddingAnItemToTheCache_ThenTheItemIsPersistedInTheCache()
+        {
+            var collection = new List<string>{"item1", "item2"};
+            Cache.Set("myCollection", collection);
+            Cache.Get("myCollection").ShouldBeSameAs(collection);
+        }
+
+        [Fact]
+        public void WhenAddingAnItemToTheCacheWithTheSameKeyAsAnExistingItem_ThenTheOriginalItemIsReplacedWithTheNewItem()
+        {
+            var collection = new List<string> { "item1", "item2" };
+            var collection2 = new List<string> { "item3" };
+            Cache.Set("myCollection", collection);
+
+            Cache.Set("myCollection", collection2);
+
+            Cache.Get("myCollection").ShouldBeSameAs(collection2);
+        }
+
+        [Fact]
+        public void WhenCheckingCacheContainesAnItemThatIsInCache_ThenShouldReturnTrue()
+        {
+            var collection = new List<string> {"item1", "item2"};
+            Cache.Set("myCollection", collection);
+            Cache.Contains("myCollection").ShouldBe(true);
+        }
+
+        [Fact]
+        public void WhenCheckingCacheContainesAnItemThatIsNotInCache_ThenShouldReturnFalse()
+        {
+            Cache.Contains("SomethingThatDoesNotExist").ShouldBe(false);
+        }
+
+
+        public void Dispose()
+        {
+            Cache.Clear();
         }
     }
 }