Writing unit tests with carter

[heitor481]

Hey guys, hows it going? I started developing an application based on Microservices using Carter. And, I remember that with Nancy, we had a class to make unit tests using. Including a namespace called Nancy.Browser.

My question is: do we have something familiar with carter? If not, how it would be a best practice to test the modules that I am going to create?

[ritasker]

@heitor481 There isn't anything like Nancy.Browsr in Carter. AspNet has a TestServer which you can use, https://docs.microsoft.com/en-us/aspnet/core/test/integration-tests?view=aspnetcore-2.2.

I have a couple of examples you can look at here, https://github.com/ritasker/CarterDemos/tree/master/SampleTests

[heitor481]

I understood a few things that you've done on the project for testing. But, with TestServer I'm basically creating the same server that I am using, so, if I have multiple dependencies on my project, I will have to add all of that on the creation of the test host, right? Please, correct me if I am wrong

I'm asking that because, with nancy browser (I know carter doesn't have that), I can only create a specific instance of a particular module that I have. Following your example, I will have to create a host of my entire application?

var client = new TestServer(new WebHostBuilder() .ConfigureServices(s => { s.AddSingleton(actorProvider); s.AddCarter(); }) .Configure(app => { app.UseCarter(); }) ).CreateClient();

Is that right?

[jchannon]

That is correct however UseCarter has an overload to choose which modules to instantiate

On Sat, 14 Sep 2019 at 23:20, Heitor Ribeiro de Souza < notifications@github.com> wrote:

I understood a few things that you've done on the project for testing. But, with TestServer I'm basically creating the same server that I am using, so, if I have multiple dependencies on my project, I will have to add all of that on the creation of the test host, right? Please, correct me if I am wrong

I'm asking that because, with nancy browser (I know carter doesn't have that), I can only create a specific instance of a particular module that I have. Following your example, I will have to create a host of my entire application?

var client = new TestServer(new WebHostBuilder() .ConfigureServices(s => { s.AddSingleton(actorProvider); s.AddCarter(); }) .Configure(app => { app.UseCarter(); }) ).CreateClient();

Is that right?

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[Matias-Barrios]

Hi All,

When using the examples given above, I get this error :

Result Message: 
System.Reflection.ReflectionTypeLoadException : Unable to load one or more of the requested types.
Could not load file or assembly 'Microsoft.Net.Http.Headers, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.

My app is a NetCore 2.1 using Carter Framework 3.10. I have installed TestHost version 2.1 as well.

Has anyone a clue what this error is about?

[heitor481]

I´m closing this issue here. The explanation was sufficient for me to make the tests needed on the project I am. Thanks a lot