public async Task DataContractFormatterThrowsOnWriteWhenOverridenCreateReturnsNull()
{
// Arrange
TestJsonMediaTypeFormatter formatter = new TestJsonMediaTypeFormatter();
formatter.ReturnNullOnCreate = true;
formatter.UseDataContractJsonSerializer = true;
MemoryStream memoryStream = new MemoryStream();
HttpContent content = new StringContent(String.Empty);
// Act & Assert
Func <Task> action = () =>
formatter.WriteToStreamAsync(
typeof(SampleType),
new SampleType(),
memoryStream,
content,
transportContext: null
);
await Assert.ThrowsAsync <InvalidOperationException>(
action,
"The 'DataContractJsonSerializer' serializer cannot serialize the type 'SampleType'."
);
Assert.NotNull(formatter.InnerDataContractSerializer);
Assert.Null(formatter.InnerJsonSerializer);
}
public async Task FormatterThrowsOnWriteWhenOverridenCreateFails()
{
// Arrange
TestJsonMediaTypeFormatter formatter = new TestJsonMediaTypeFormatter();
formatter.ThrowAnExceptionOnCreate = true;
MemoryStream memoryStream = new MemoryStream();
HttpContent content = new StringContent(String.Empty);
// Act & Assert
Func <Task> action = () =>
formatter.WriteToStreamAsync(
typeof(SampleType),
new SampleType(),
memoryStream,
content,
transportContext: null
);
await Assert.ThrowsAsync <InvalidOperationException>(
action,
"The 'CreateJsonSerializer' method threw an exception when attempting to create a JSON serializer."
);
Assert.Null(formatter.InnerDataContractSerializer);
Assert.NotNull(formatter.InnerJsonSerializer);
}
public void WriteToStreamAsync_RoundTripsJToken()
{
string beforeMessage = "Hello World";
TestJsonMediaTypeFormatter formatter = new TestJsonMediaTypeFormatter();
JToken before = new JValue(beforeMessage);
MemoryStream memStream = new MemoryStream();
Assert.Task.Succeeds(formatter.WriteToStreamAsync(typeof(JToken), before, memStream, null, null));
memStream.Position = 0;
JToken after = JToken.Load(new JsonTextReader(new StreamReader(memStream)));
string afterMessage = after.ToObject <string>();
Assert.Equal(beforeMessage, afterMessage);
}
public void FormatterThrowsOnWriteWhenOverridenCreateReturnsNull()
{
// Arrange
TestJsonMediaTypeFormatter formatter = new TestJsonMediaTypeFormatter();
formatter.ReturnNullOnCreate = true;
MemoryStream memoryStream = new MemoryStream();
HttpContent content = new StringContent(String.Empty);
// Act & Assert
Action action = () => formatter.WriteToStreamAsync(typeof(SampleType), new SampleType(), memoryStream, content, transportContext: null).Wait();
Assert.Throws <InvalidOperationException>(action, "The 'CreateJsonSerializer' method returned null. It must return a JSON serializer instance.");
Assert.Null(formatter.InnerDataContractSerializer);
Assert.NotNull(formatter.InnerJsonSerializer);
}
public void ReadFromStreamAsync_RoundTripsWriteToStreamAsync(Type variationType, object testData)
{
TestJsonMediaTypeFormatter formatter = new TestJsonMediaTypeFormatter();
HttpContentHeaders contentHeaders = FormattingUtilities.CreateEmptyContentHeaders();
bool canSerialize = IsTypeSerializableWithJsonSerializer(variationType, testData) && Assert.Http.CanRoundTrip(variationType);
if (canSerialize)
{
object readObj = null;
Assert.Stream.WriteAndRead(
stream =>
{
Assert.Task.Succeeds(formatter.WriteToStreamAsync(variationType, testData, stream, contentHeaders, transportContext: null));
contentHeaders.ContentLength = stream.Length;
},
stream => readObj = Assert.Task.SucceedsWithResult(formatter.ReadFromStreamAsync(variationType, stream, contentHeaders, null)));
Assert.Equal(testData, readObj);
}
}
public void ReadFromStreamAsyncRoundTripsWriteToStreamAsync()
{
TestJsonMediaTypeFormatter formatter = new TestJsonMediaTypeFormatter();
HttpContentHeaders contentHeaders = new StringContent(string.Empty).Headers;
TestDataAssert.Execute(
TestData.RepresentativeValueAndRefTypeTestDataCollection,
(type, obj) =>
{
bool canSerialize = IsTypeSerializableWithJsonSerializer(type, obj) && HttpTestData.CanRoundTrip(type);
if (canSerialize)
{
object readObj = null;
StreamAssert.WriteAndRead(
(stream) => TaskAssert.Succeeds(formatter.WriteToStreamAsync(type, obj, stream, contentHeaders, /*transportContext*/ null)),
(stream) => readObj = TaskAssert.SucceedsWithResult(formatter.ReadFromStreamAsync(type, stream, contentHeaders)));
TestDataAssert.AreEqual(obj, readObj, "Failed to round trip object.");
}
});
}
