public async Task ExecuteAsync_AsynchronouslyFlushesToTheResponseStream_PriorToDispose(int writeLength)
{
// Arrange
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Returns((ViewContext v) =>
Task.Run(async() =>
{
var text = new string('a', writeLength);
await v.Writer.WriteAsync(text);
}));
var context = new DefaultHttpContext();
var stream = new Mock <Stream>();
context.Response.Body = stream.Object;
var actionContext = new ActionContext(
context,
new RouteData(),
new ActionDescriptor());
var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider());
// Act
await ViewExecutor.ExecuteAsync(
view.Object,
actionContext,
viewData,
Mock.Of <ITempDataDictionary>(),
new HtmlHelperOptions(),
ViewExecutor.DefaultContentType);
// Assert
stream.Verify(s => s.FlushAsync(It.IsAny <CancellationToken>()), Times.Once());
stream.Verify(s => s.Write(It.IsAny <byte[]>(), It.IsAny <int>(), It.IsAny <int>()), Times.Never());
}
public async Task ExecuteAsync_DoesNotWriteToResponse_OnceExceptionIsThrown()
{
// Arrange
var expectedLength = 0;
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
throw new Exception();
});
var context = new DefaultHttpContext();
var memoryStream = new MemoryStream();
context.Response.Body = memoryStream;
var actionContext = new ActionContext(
context,
new RouteData(),
new ActionDescriptor());
var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider());
// Act
await Record.ExceptionAsync(
() => ViewExecutor.ExecuteAsync(
view.Object,
actionContext,
viewData,
null,
new HtmlHelperOptions(),
contentType: null));
// Assert
Assert.Equal(expectedLength, memoryStream.Length);
}