Add attribute to serialize strings as base64 encoded

Octokit.Tests/SimpleJsonSerializerTests.cs

@@ -1,4 +1,4 @@
-using System;
+using Octokit.Helpers;
 using Octokit.Internal;
 using Xunit;
 
@@ -63,6 +63,21 @@ namespace Octokit.Tests
 
                 Assert.Equal("{\"int\":42,\"bool\":true}", json);
             }
+
+            [Fact]
+            public void HandlesBase64EncodedStrings()
+            {
+                var item = new SomeObject
+                {
+                    Name = "Ferris Bueller",
+                    Content = "Day off",
+                    Description = "stuff"
+                };
+
+                var json = new SimpleJsonSerializer().Serialize(item);
+
+                Assert.Equal("{\"name\":\"RmVycmlzIEJ1ZWxsZXI=\",\"description\":\"stuff\",\"content\":\"RGF5IG9mZg==\"}", json);
+            }
         }
 
         public class TheDeserializeMethod
@@ -80,6 +95,18 @@ namespace Octokit.Tests
                 Assert.True(sample.Private);
             }
 
+            [Fact]
+            public void UnencodesBase64Strings()
+            {
+                const string json = "{\"name\":\"RmVycmlzIEJ1ZWxsZXI=\",\"description\":\"stuff\",\"content\":\"RGF5IG9mZg==\"}";
+                
+                var someObject = new SimpleJsonSerializer().Deserialize<SomeObject>(json);
+
+                Assert.Equal("Ferris Bueller", someObject.Name);
+                Assert.Equal("Day off", someObject.Content);
+                Assert.Equal("stuff", someObject.Description);
+            }
+
             [Fact]
             public void CanDeserializeOrganization()
             {
@@ -154,5 +181,16 @@ namespace Octokit.Tests
             [Parameter(Key = "_links")]
             public string Links { get; set; }
         }
+
+        public class SomeObject
+        {
+            [SerializeAsBase64]
+            public string Name { get; set; }
+
+            [SerializeAsBase64]
+            public string Content;
+
+            public string Description { get; set; }
+        }
     }
 }