public async Task NotExistent_RouteDefinitionMatch_Test()
{
var httpContext = new DefaultHttpContext();
A.CallTo(() => _routeDefinitionMatcher.MatchAsync(
httpContext.Request.Path,
httpContext.Request.Method))
.Returns <RouteDefinitionMatch>(null);
await _middleware.InvokeAsync(httpContext);
Assert.IsNull(httpContext.GetRouteDefinitionMatch());
A.CallTo(() => _next(httpContext))
.MustHaveHappened();
}