public async Task ExecuteAsync_CommonException_HandlesException()
        {
            var exceptionHandler = new SyncPingCommonExceptionHandler();

            var middleware = new ExceptionHandlingMiddleware <Ping, int>(new[] { exceptionHandler });

            var query   = new Ping();
            var handler = new BrokenPingHandler();

            var actual = await middleware.ExecuteAsync(
                query,
                () => handler.HandleAsync(query, default),
                default
                );

            actual.Should().Be(exceptionHandler.Value);
        }
        public async Task ExecuteAsync_MultipleExceptionHandlers_UsesConcreteHandler()
        {
            var concreteExceptionHandler = new SyncPingConcreteExceptionHandler();

            var middleware = new ExceptionHandlingMiddleware <Ping, int>(
                new IQueryExceptionHandler <Ping, int>[]
            {
                new SyncPingCommonExceptionHandler(),
                concreteExceptionHandler
            }
                );

            var query   = new Ping();
            var handler = new BrokenPingHandler();

            var actual = await middleware.ExecuteAsync(
                query,
                () => handler.HandleAsync(query, default),
                default
                );

            actual.Should().Be(concreteExceptionHandler.Value);
        }