public async Task CombineAMiddlewareAndASimpleFuncShouldReturnAFuncThatCombinesThemAsync()
{
// Given
var calls = new List <string>();
SimpleAsyncMiddlewareFunc <string, int> func = async str =>
{
calls.Add("Func");
await Task.CompletedTask;
return(str.Length);
};
AsyncMiddleware <string, int> middleware = async(str, next, ct) =>
{
calls.Add("Before");
var result = await next(str, ct);
calls.Add("After");
return(result);
};
var context = "Hello world!";
// When
var result = await middleware.Combine(func)(context, default);
// Then
result.Should().Be(context.Length);
calls.Should().Equal("Before", "Func", "After");
}
public static AsyncMiddlewareFunc <TContext, TResult> Combine <TContext, TResult>(
this AsyncMiddleware <TContext, TResult> middleware,
SimpleAsyncMiddlewareFunc <TContext, TResult> func) =>
(context, ct) => middleware(context, (c, _) => func(c), ct);
