use href key for link templates

Author: Chris Santero

JSONAPI.Tests/Data/LinkTemplateTest.json

@@ -0,0 +1,11 @@
+{
+    "posts": {
+        "id": "2",
+        "title": "How to fry an egg",
+        "links": {
+            "author": {
+                "href": "/users/5"
+            }
+        }
+    }
+}

JSONAPI.Tests/JSONAPI.Tests.csproj

@@ -69,6 +69,8 @@
   <ItemGroup>
     <Compile Include="Core\MetadataManagerTests.cs" />
     <Compile Include="Json\JsonApiMediaFormaterTests.cs" />
+    <Compile Include="Json\JsonHelpers.cs" />
+    <Compile Include="Json\LinkTemplateTests.cs" />
     <Compile Include="Models\Author.cs" />
     <Compile Include="Models\Comment.cs" />
     <Compile Include="Models\Post.cs" />
@@ -82,6 +84,9 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
+    <None Include="Data\LinkTemplateTest.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Include="Data\SerializerIntegrationTest.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>

JSONAPI.Tests/Json/LinkTemplateTests.cs

@@ -0,0 +1,67 @@
+using JSONAPI.Attributes;
+using JSONAPI.Json;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Diagnostics;
+using System.IO;
+using System.Text;
+
+namespace JSONAPI.Tests.Json
+{
+    [TestClass]
+    public class LinkTemplateTests
+    {
+        private class Post
+        {
+            public string Id { get; set; }
+
+            public string Title { get; set; }
+
+            [SerializeAs(SerializeAsOptions.Link)]
+            [LinkTemplate("/users/{0}")]
+            public virtual User Author { get; set; }
+        }
+
+        private class User
+        {
+            public string Id { get; set; }
+
+            public string Name { get; set; }
+        }
+
+        private Post ThePost { get; set; }
+
+        [TestInitialize]
+        public void SetupModels()
+        {
+            ThePost = new Post
+            {
+                Id = "2",
+                Title = "How to fry an egg",
+                Author = new User
+                {
+                    Id = "5",
+                    Name = "Bob"
+                }
+            };
+        }
+
+        [TestMethod]
+        [DeploymentItem(@"Data\LinkTemplateTest.json")]
+        public void GetResourceWithLinkTemplateRelationship()
+        {
+            var formatter = new JsonApiFormatter
+            {
+                PluralizationService = new JSONAPI.Core.PluralizationService()
+            };
+            var stream = new MemoryStream();
+
+            formatter.WriteToStreamAsync(typeof(Post), ThePost, stream, null, null);
+
+            // Assert
+            var expected = JsonHelpers.MinifyJson(File.ReadAllText("LinkTemplateTest.json"));
+            var output = Encoding.ASCII.GetString(stream.ToArray());
+            Trace.WriteLine(output);
+            Assert.AreEqual(output.Trim(), expected);
+        }
+    }
+}

JSONAPI/Json/JsonApiFormatter.cs

@@ -281,7 +281,10 @@ protected void Serialize(object value, Stream writeStream, JsonWriter writer, Js
                                 string link = String.Format(lt, objId,
                                     value.GetType().GetProperty("Id").GetValue(value, null));
                                 //writer.WritePropertyName(ContractResolver.FormatPropertyName(prop.Name));
+                                writer.WriteStartObject();
+                                writer.WritePropertyName("href");
                                 writer.WriteValue(link);
+                                writer.WriteEndObject();
                                 break;
                             case SerializeAsOptions.Embedded:
                                 // Not really supported by Ember Data yet, incidentally...but easy to implement here.