using FakeItEasy;
using FakeItEasy.AutoFakeIt;
using NUnit.Framework;

namespace UnitTests
{
    public interface IMyDependency
    {
        string MyMethod();
    }

    public class MyDependency : IMyDependency
    {
        public string MyMethod() => "Hello";
    }

    public class MyOtherDependency
    {
        public virtual string MyMethod() => "World";
    }

    public class MySut
    {
        public IMyDependency MyDependency { get; }
        public MyOtherDependency MyOtherDependency { get; }

        public MySut(IMyDependency myDependency, MyOtherDependency myOtherDependency)
        {
            MyDependency = myDependency;
            MyOtherDependency = myOtherDependency;
        }
    }

    public class SampleTest
    {
        [Test]
        public void MyTest()
        {
            // the main entrypoint, you can put this on a base class, as long
            // as you always create a new one for each test to make sure that
            // your tests are idempotent and isolated
            var autoFakeIt = new AutoFakeIt();

            // you can optionally provide a dependency for any type
            autoFakeIt.Provide<IMyDependency>(new MyDependency());

            // it will respect any objects you've provided before
            // you can also just let the Generate provide FakeItEasy's fakes
            // for all missing dependencies
            var mySut = autoFakeIt.Generate<MySut>();

            // you can get any dependency used/generated
            var theAutoFakedDependency = autoFakeIt.Resolve<MyOtherDependency>();

            // you can setup or assert the generated fakes since it is
            // just an ordinary FakeItEasy's fake object
            A.CallTo(() => theAutoFakedDependency.MyMethod()).Returns("Faked");
        }
    }
}