Testing Overridden AppService #1077

raif created 4 years ago

https://docs.abp.io/en/abp/latest/Testing#example-testing-an-application-service

ABP Framework version: v4.2.2
UI type: MVC
DB provider: EF Core
Tiered (MVC) or Identity Server Separated (Angular): yes
Exception message and stack trace:
Autofac.Core.DependencyResolutionException: 'An exception was thrown while activating Siemens.NMM.Saas.Host.NMMTenantAppService.'
-InnerException {"None of the constructors found with 'Volo.Abp.Autofac.AbpAutofacConstructorFinder' on type 'Siemens.NMM.Saas.Host.NMMTenantAppService' can be invoked with the available services and parameters:\r\nCannot resolve parameter 'Microsoft.AspNetCore.Hosting.IWebHostEnvironment hosting' of constructor 'Void .ctor(Volo.Saas.Editions.IEditionRepository, Volo.Saas.Tenants.ITenantRepository, Volo.Saas.Tenants.ITenantManager, Volo.Abp.Data.IDataSeeder, Microsoft.Extensions.Configuration.IConfiguration, Microsoft.AspNetCore.Hosting.IWebHostEnvironment)'."} System.Exception {Autofac.Core.DependencyResolutionException}
Steps to reproduce the issue:
I just override TenantAppService which is coming from Saas Module.
Changes are very simple, one overriding of existing method, one totally new method

Now i would like to add tests related with those 2 method therefore i created Service Tests which inherits from Application Test Base

GetRequiredService<INMMTenantAppService>(); not able to resolve service.

What am i missing ?

alper created 4 years ago

Support Team Director

Be aware that Unit Test module will not initialize when you are using a real IWebHostEnvironment .
And you have a IWebHostEnvironment argument in the constructor of the ApplicationService.
You need to mock WebHostEnvironment in order to get it run.
Because there's no real WebHostEnvironment in the test phase:

Mock class for IWebHostEnvironment:

WebHostEnvironmentMock.cs

public class WebHostEnvironmentMock : IWebHostEnvironment
    {
        public string EnvironmentName { get; set; }
        public string ApplicationName { get; set; }
        public string ContentRootPath { get; set; }
        public IFileProvider ContentRootFileProvider { get; set; }
        public IFileProvider WebRootFileProvider { get; set; }
        public string WebRootPath { get; set; }

        public WebHostEnvironmentMock()
        {
            var absoluteRootPath = Path.GetFullPath(string.Format("..{0}..{0}..{0}..{0}..{0}src{0}Siemens.NMM.Web, System.IO.Path.DirectorySeparatorChar));
            ContentRootPath = absoluteRootPath; //absolute path to your Web project
            WebRootPath = Path.Combine(absoluteRootPath, "wwwroot"); //this should point to wwwroot of your Web project
        }
    }

Replace the implementation of IWebHostEnvironment to your mock class:

NMMApplicationTestModule.cs

public class NMMWebTestModule : AbpModule
{
    public override void ConfigureServices(ServiceConfigurationContext context)
    {
        var configuration = context.Services.GetConfiguration();
        context.Services.AddSingleton(new WebHostEnvironmentMock());
    }
}