public async Task ChangesTo_SerializerSettings_AffectSerialization()
{
// Arrange
var person = new User()
{
FullName = "John", age = 35
};
var outputFormatterContext = GetOutputFormatterContext(person, typeof(User));
var settings = new JsonSerializerSettings
{
ContractResolver = new CamelCasePropertyNamesContractResolver(),
Formatting = Formatting.Indented,
};
var expectedOutput = JsonConvert.SerializeObject(person, settings);
var jsonFormatter = new NewtonsoftJsonOutputFormatter(settings, ArrayPool <char> .Shared);
// Act
await jsonFormatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.UTF8);
// Assert
var body = outputFormatterContext.HttpContext.Response.Body;
Assert.NotNull(body);
body.Position = 0;
var content = new StreamReader(body, Encoding.UTF8).ReadToEnd();
Assert.Equal(expectedOutput, content);
}
public void CanWriteResult_ReturnsExpectedValueForMediaType(
string mediaType,
bool isServerDefined,
string expectedResult)
{
// Arrange
var formatter = new NewtonsoftJsonOutputFormatter(new JsonSerializerSettings(), ArrayPool <char> .Shared);
var body = new MemoryStream();
var actionContext = GetActionContext(MediaTypeHeaderValue.Parse(mediaType), body);
var outputFormatterContext = new OutputFormatterWriteContext(
actionContext.HttpContext,
new TestHttpResponseStreamWriterFactory().CreateWriter,
typeof(string),
new object())
{
ContentType = new StringSegment(mediaType),
ContentTypeIsServerDefined = isServerDefined,
};
// Act
var actualCanWriteValue = formatter.CanWriteResult(outputFormatterContext);
// Assert
var expectedContentType = expectedResult ?? mediaType;
Assert.Equal(expectedResult != null, actualCanWriteValue);
Assert.Equal(new StringSegment(expectedContentType), outputFormatterContext.ContentType);
}
public async Task WriteToStreamAsync_UsesCorrectCharacterEncoding(
string content,
string encodingAsString,
bool isDefaultEncoding)
{
// Arrange
var formatter = new NewtonsoftJsonOutputFormatter(new JsonSerializerSettings(), ArrayPool <char> .Shared);
var formattedContent = "\"" + content + "\"";
var mediaType = MediaTypeHeaderValue.Parse(string.Format("application/json; charset={0}", encodingAsString));
var encoding = CreateOrGetSupportedEncoding(formatter, encodingAsString, isDefaultEncoding);
var expectedData = encoding.GetBytes(formattedContent);
var body = new MemoryStream();
var actionContext = GetActionContext(mediaType, body);
var outputFormatterContext = new OutputFormatterWriteContext(
actionContext.HttpContext,
new TestHttpResponseStreamWriterFactory().CreateWriter,
typeof(string),
content)
{
ContentType = new StringSegment(mediaType.ToString()),
};
// Act
await formatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.GetEncoding(encodingAsString));
// Assert
var actualData = body.ToArray();
Assert.Equal(expectedData, actualData);
}
public async Task ErrorDuringSerialization_DoesNotCloseTheBrackets()
{
// Arrange
var expectedOutput = "{\"name\":\"Robert\"";
var outputFormatterContext = GetOutputFormatterContext(
new ModelWithSerializationError(),
typeof(ModelWithSerializationError));
var serializerSettings = JsonSerializerSettingsProvider.CreateSerializerSettings();
var jsonFormatter = new NewtonsoftJsonOutputFormatter(serializerSettings, ArrayPool <char> .Shared);
// Act
try
{
await jsonFormatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.UTF8);
}
catch (JsonSerializationException serializerException)
{
var expectedException = Assert.IsType <NotImplementedException>(serializerException.InnerException);
Assert.Equal("Property Age has not been implemented", expectedException.Message);
}
// Assert
var body = outputFormatterContext.HttpContext.Response.Body;
Assert.NotNull(body);
body.Position = 0;
var content = new StreamReader(body, Encoding.UTF8).ReadToEnd();
Assert.Equal(expectedOutput, content);
}
public async Task WriteToStreamAsync_LargePayload_DoesNotPerformSynchronousWrites()
{
// Arrange
var model = Enumerable.Range(0, 1000).Select(p => new User {
FullName = new string('a', 5000)
});
var stream = new Mock <Stream> {
CallBase = true
};
stream.Setup(v => v.WriteAsync(It.IsAny <byte[]>(), It.IsAny <int>(), It.IsAny <int>(), It.IsAny <CancellationToken>()))
.Returns(Task.CompletedTask);
stream.SetupGet(s => s.CanWrite).Returns(true);
var formatter = new NewtonsoftJsonOutputFormatter(new JsonSerializerSettings(), ArrayPool <char> .Shared, new MvcOptions());
var outputFormatterContext = GetOutputFormatterContext(
model,
typeof(string),
"application/json; charset=utf-8",
stream.Object);
// Act
await formatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.UTF8);
// Assert
stream.Verify(v => v.WriteAsync(It.IsAny <byte[]>(), It.IsAny <int>(), It.IsAny <int>(), It.IsAny <CancellationToken>()), Times.AtLeastOnce());
stream.Verify(v => v.Write(It.IsAny <byte[]>(), It.IsAny <int>(), It.IsAny <int>()), Times.Never());
stream.Verify(v => v.Flush(), Times.Never());
}
public async Task MvcJsonOptionsAreUsedToSetBufferThreshold()
{
// Arrange
var person = new User()
{
FullName = "John", age = 35
};
Stream writeStream = null;
var outputFormatterContext = GetOutputFormatterContext(person, typeof(User), writerFactory: (stream, encoding) =>
{
writeStream = stream;
return(StreamWriter.Null);
});
var settings = new JsonSerializerSettings
{
ContractResolver = new CamelCasePropertyNamesContractResolver(),
Formatting = Formatting.Indented,
};
var expectedOutput = JsonConvert.SerializeObject(person, settings);
var jsonFormatter = new NewtonsoftJsonOutputFormatter(settings, ArrayPool <char> .Shared, new MvcOptions(), new MvcNewtonsoftJsonOptions()
{
OutputFormatterMemoryBufferThreshold = 2
});
// Act
await jsonFormatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.UTF8);
// Assert
Assert.IsType <FileBufferingWriteStream>(writeStream);
Assert.Equal(2, ((FileBufferingWriteStream)writeStream).MemoryThreshold);
}
public async Task MvcJsonOptionsAreUsedToSetBufferThresholdFromServices()
{
// Arrange
var person = new User()
{
FullName = "John", age = 35
};
Stream writeStream = null;
var outputFormatterContext = GetOutputFormatterContext(person, typeof(User), writerFactory: (stream, encoding) =>
{
writeStream = stream;
return(StreamWriter.Null);
});
var services = new ServiceCollection()
.AddOptions()
.Configure <MvcNewtonsoftJsonOptions>(o =>
{
o.OutputFormatterMemoryBufferThreshold = 1;
})
.BuildServiceProvider();
outputFormatterContext.HttpContext.RequestServices = services;
var settings = new JsonSerializerSettings
{
ContractResolver = new CamelCasePropertyNamesContractResolver(),
Formatting = Formatting.Indented,
};
var expectedOutput = JsonConvert.SerializeObject(person, settings);
#pragma warning disable CS0618 // Type or member is obsolete
var jsonFormatter = new NewtonsoftJsonOutputFormatter(settings, ArrayPool <char> .Shared, new MvcOptions());
#pragma warning restore CS0618 // Type or member is obsolete
// Act
await jsonFormatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.UTF8);
// Assert
Assert.IsType <FileBufferingWriteStream>(writeStream);
Assert.Equal(1, ((FileBufferingWriteStream)writeStream).MemoryThreshold);
}
private static Encoding CreateOrGetSupportedEncoding(
NewtonsoftJsonOutputFormatter formatter,
string encodingAsString,
bool isDefaultEncoding)
{
Encoding encoding = null;
if (isDefaultEncoding)
{
encoding = formatter.SupportedEncodings
.First((e) => e.WebName.Equals(encodingAsString, StringComparison.OrdinalIgnoreCase));
}
else
{
encoding = Encoding.GetEncoding(encodingAsString);
formatter.SupportedEncodings.Add(encoding);
}
return(encoding);
}
public JsonHalOutputFormatter(JsonSerializerSettings serializerSettings
#if NET6_0
, MvcOptions mvcOpt
#endif
, IEnumerable <string> halJsonMediaTypes = null)
{
if (halJsonMediaTypes == null)
{
halJsonMediaTypes = new string[] { HalJsonType }
}
;
this.serializerSettings = serializerSettings;
this.jsonFormatter = new JsonOutputFormatter(serializerSettings, ArrayPool <Char> .Create()
#if NET6_0
, mvcOpt, null
#endif
);
this.halJsonMediaTypes = halJsonMediaTypes;
}
public async Task WriteToStreamAsync_RoundTripsJToken()
{
// Arrange
var beforeMessage = "Hello World";
var formatter = new NewtonsoftJsonOutputFormatter(new JsonSerializerSettings(), ArrayPool <char> .Shared, new MvcOptions());
var memStream = new MemoryStream();
var outputFormatterContext = GetOutputFormatterContext(
beforeMessage,
typeof(string),
"application/json; charset=utf-8",
memStream);
// Act
await formatter.WriteResponseBodyAsync(outputFormatterContext, Encoding.UTF8);
// Assert
memStream.Position = 0;
var after = JToken.Load(new JsonTextReader(new StreamReader(memStream)));
var afterMessage = after.ToObject <string>();
Assert.Equal(beforeMessage, afterMessage);
}
