public void GetService_PrefersServiceInDependencyInjectionContainer()
{
TestActionValueBinder instance = new TestActionValueBinder();
this.WrapTest(
configure: services => services.AddSingleton <IActionValueBinder>(implementationInstance: instance),
testImpl: this.GetService_PrefersServiceInDependencyInjectionContainer_Impl,
arg: instance
);
}
public void Controller_Overrides_DependencyInjection()
{
TestActionValueBinder newDIService = new TestActionValueBinder();
this.WrapTest(
services =>
{
_ = services.AddSingleton <IActionValueBinder>(implementationInstance: newDIService);
// _ = services.AddScoped<IActionValueBinder,TestActionValueBinder>();
},
this.Controller_Overrides_DependencyInjection_Impl,
newDIService
);
}
private void Controller_Overrides_DependencyInjection_Impl(IDependencyResolver resolver, TestActionValueBinder newDIService)
{
if (resolver is null)
{
throw new ArgumentNullException(nameof(resolver));
}
// Calling `.BeginScope()` here is to simulate what happens inside `DefaultHttpControllerActivator.GetInstanceOrActivator`
using (IDependencyScope requestScope = resolver.BeginScope())
{
_ = requestScope.ShouldNotBeNull();
// Setting on Controller config overrides the DI container.
HttpConfiguration config = new HttpConfiguration();
// IActionValueBinder newDIService = new TestActionValueBinder();
config.DependencyResolver = resolver;
ControllerServices cs = new ControllerServices(config.Services);
IActionValueBinder newLocalService = new TestActionValueBinder();
cs.Replace(typeof(IActionValueBinder), newLocalService);
// Act
IActionValueBinder localVal = (IActionValueBinder)cs.GetService(typeof(IActionValueBinder));
IActionValueBinder globalVal = (IActionValueBinder)config.Services.GetService(typeof(IActionValueBinder));
_ = localVal.ShouldNotBeNull().ShouldBeOfType <TestActionValueBinder>();
_ = globalVal.ShouldNotBeNull().ShouldBeOfType <TestActionValueBinder>();
// Assert
// Local controller didn't override, should get same value as global case.
Object.ReferenceEquals(newDIService, globalVal).ShouldBeTrue(); // asking the config will give back the DI service
Object.ReferenceEquals(newLocalService, localVal).ShouldBeTrue(); // but asking locally will get back the local service.
}
}
private void GetService_PrefersServiceInDependencyInjectionContainer_Impl(IDependencyResolver resolver, TestActionValueBinder serviceInstance)
{
// Arrange
HttpConfiguration config = new HttpConfiguration();
DefaultServices defaultServices = new DefaultServices(config);
IActionValueBinder filterProvider = serviceInstance;
config.DependencyResolver = resolver;
// Act
object service = defaultServices.GetService(typeof(IActionValueBinder));
// Assert
Object.ReferenceEquals(filterProvider, service).ShouldBeTrue();
}
