MockH

This library allows to mock HTTP responses for integration, component and acceptance tests of your projects written in C# / .NET 8/9 by hosting a webserver returning configured responses.

• Fast and thread safe
• Only a few dependencies
• No configuration needed
• Does not interfer with Kestrel or ASP.NET
• Independent from the testing framework in place

Usage

using MockH;

[TestMethod]
public async Task TestSomething() 
{
   await using var server = await MockServer.RunAsync
   (
       On.Get("/users/1").Return(new User(...)),
       On.Get("/users/2").Respond(ResponseStatus.NoContent)
   );

   // access the server in your code via HTTP
   using var client = new HttpClient();

   await client.GetStringAsync(server.Url("/users/1"));
}

Basic Usage

// return a specific status code
On.Get("/ifail").Respond(ResponseStatus.InternalServerError);

// redirect the client
On.Get().Redirect("https://github.com");

// execute logic and return some simple text value
On.Get().Run(() => "42");

// execute logic and return some JSON
private record MyClass(int IntValue, string StringValue);

On.Get().Run(() => new MyClass(42, "The answer"));

// execute logic asynchronously
On.Get().Run(async () => await ...);

// access query parameters (GET /increment?=1)
On.Get("/increment").Run((int i) => i + 1);

// access path parameters (GET /increment/1)
On.Get("/increment/:i").Run((int i) => i + 1);

// access request body
On.Post().Run((MyClass body) => body);

// access request body as stream
On.Post().Run((Stream body) => body.Length);

Advanced Usage

// directly access request and response
On.Get().Run((IRequest request) => request.Respond().Status(ResponseStatus.BadRequest));

// return a handler provided by the GenHTTP framework, e.g. a website
// see https://genhttp.org/documentation/content/
// can be useful if you want to test some kind of website crawler
On.Get().Run(() => Listing.From(ResourceTree.FromDirectory("/var/www")));