public void Invoke_LogsAndRethrows()
{
Exception exception = new Exception();
ILogger logger = Substitute.For <ILogger>();
HttpContext context = Substitute.For <HttpContext>();
RequestDelegate next = Substitute.For <RequestDelegate>();
context.RequestServices.GetService <ILogger>().Returns(logger);
ExceptionFilterMiddleware middleware = new ExceptionFilterMiddleware(next);
next.When(sub => sub(context)).Do(info => { throw exception; });
Exception actual = Assert.Throws <AggregateException>(() => middleware.Invoke(context).Wait()).InnerException;
Exception expected = exception;
logger.Received().Log(exception);
Assert.Same(expected, actual);
}
public async Task InvokeAsync_CatchesExceptionAfterExecutingRequestDelegate()
{
// Arrange
const string exceptionMessage = "InvokeAsync_CatchesExceptionAfterExecutingRequestDelegate";
var context = new DefaultHttpContext();
_requestDelegate.When(a => a.Invoke(context)).Throw(new NotImplementedException(exceptionMessage));
// Act
await _sut.InvokeAsync(context);
// Assert
_logger.Received(1).Log(LogLevel.Error, Arg.Any <EventId>(),
Arg.Is <object>(o => o.ToString() == $"An unhandled exception occurred. Trace Identifier: {context.TraceIdentifier}"),
Arg.Is <NotImplementedException>(e => e.Message == exceptionMessage), Arg.Any <Func <object, Exception, string> >());
context.Response.StatusCode.Should().Be(500);
context.Response.ContentType.Should().Be("application/json");
context.Response.Body.Should().NotBeNull();
}