c# - Dependency Injection resolve and unit testing -


I am trying to learn dependency injection and came into a problem when the unit tests the test.

I am writing a console application and have been created and started in the container main (), it is available as a get-property program in . Container anywhere, my application can call the program. Container. Resolve & lt; .. & gt; () .

I have a ServiceValidator class like: 

  Public Class Service Provinces (Private Readonly IC configuration _configuration; Private Readonly IService _service; Public ServiceWidder (IConfiguration Configuration, IService Service) { _configuration = Configuration; _service = service;}

In the second class I 

  ServiceValidator serviceValidator = Program.Container.Resolve  ( ); ServiceValidator.VerifyVersion ();   
 This is a call to  program.Container.Resolve , which gives me a unit test Problems arise because it has not been setup. 
 
 Is there a bad habit to solve the container? I can create a service example in  main  and the object I can pass from around, but it seems stupid as it causes a lot of parameters for the object which just gets around the next method. 
 
 So I think it Sweep to solve within a class Ary, but then the container must be configured for the unit test. How should I do this, should I take the container from programmable to second place? What would you recommend? 
 
 If it matters, then I am using Unity and C #. 
 
 Thanks: -)

Is this a bad practice, to fix the container? I can make serviscript examples in main () and pass the object all around, but it seems stupid because it causes a lot of parameters for those objects which are just around the next method.

When you use dependency injection all the way, you will not need to pass a lot of parameters for the object. The constructor of each object should only be in the form of dependencies, which use it directly - it does not know about the gross dependence of its direct dependencies.

So if you have a class X for which a service applicant, then the type of Constructor parameter near Class X will be ServiceValidator. So if some square uses Y square X, then there will be a constructor parameter of Type X in class Y. Notice that Y do not know anything about ServiceValidator, so you do not need to pass the service provider to one class second - the only place where it is used, when creating X , And it is often done only in one place by the De Framework or in a hand-written factory.

Some links for more information:

  • - Your question about passing the object begins at 19:20 "Myth About D "

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