fix: make tests work

Author: Harro van der Kroft

src/Examples/GettingStarted/GettingStarted.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <Folder Include="Properties\" />
     <Folder Include="wwwroot\" />
   </ItemGroup>
 

src/Examples/JsonApiDotNetCoreExample/Models/TodoItem.cs

@@ -30,7 +30,7 @@ public TodoItem()
         [Attr("updated-date")]
         public DateTime? UpdatedDate { get; set; }
 
-        [Attr("calculated-value")]
+        [Attr("calculated-value", isImmutable: true)]
         public string CalculatedValue
         {
             get => "joe";

src/JsonApiDotNetCore/Formatters/IJsonApiReader.cs

@@ -3,8 +3,12 @@
 
 namespace JsonApiDotNetCore.Formatters
 {
+    /// <summary>
+    /// The deserializer of the body, used in .NET core internally
+    /// to process `FromBody`
+    /// </summary>
     public interface IJsonApiReader
     {
         Task<InputFormatterResult> ReadAsync(InputFormatterContext context);
     }
-}
+}

src/JsonApiDotNetCore/Formatters/JsonApiReader.cs

@@ -10,13 +10,13 @@
 
 namespace JsonApiDotNetCore.Formatters
 {
+    /// <inheritdoc />
     public class JsonApiReader : IJsonApiReader
     {
         private readonly IJsonApiDeSerializer _deSerializer;
         private readonly IJsonApiContext _jsonApiContext;
         private readonly ILogger<JsonApiReader> _logger;
 
-
         public JsonApiReader(IJsonApiDeSerializer deSerializer, IJsonApiContext jsonApiContext, ILoggerFactory loggerFactory)
         {
             _deSerializer = deSerializer;
@@ -37,13 +37,21 @@ public Task<InputFormatterResult> ReadAsync(InputFormatterContext context)
             {
                 var body = GetRequestBody(context.HttpContext.Request.Body);
 
-                var model = _jsonApiContext.IsRelationshipPath ?
-                    _deSerializer.DeserializeRelationship(body) :
-                    _deSerializer.Deserialize(body);
+                object model =null;
+
+                if (_jsonApiContext.IsRelationshipPath)
+                {
+                    model = _deSerializer.DeserializeRelationship(body);
+                }
+                else
+                {
+                    model = _deSerializer.Deserialize(body);
+                }
 
                 if (model == null)
+                {
                     _logger?.LogError("An error occurred while de-serializing the payload");
-
+                }
                 return InputFormatterResult.SuccessAsync(model);
             }
             catch (Exception ex)

test/JsonApiDotNetCoreExampleTests/Acceptance/Spec/UpdatingDataTests.cs

@@ -70,6 +70,7 @@ public async Task Response400IfUpdatingNotSettableAttribute()
             var response = await client.SendAsync(request);
 
             // Assert
+            var body = await response.Content.ReadAsStringAsync();
             Assert.Equal(422, Convert.ToInt32(response.StatusCode));
         }