public void WhenGettingServiceWithDependencyInjectionThenReturnsFromDependencyInjection()
{
// Setting on Handler config overrides the DI container.
ProcessorConfiguration config = new ProcessorConfiguration();
ICommandHandlerTypeResolver newDiService = new Mock <ICommandHandlerTypeResolver>().Object;
var mockDependencyResolver = new Mock <IDependencyResolver>();
mockDependencyResolver.Setup(dr => dr.GetService(typeof(ICommandHandlerTypeResolver))).Returns(newDiService);
config.DependencyResolver = mockDependencyResolver.Object;
HandlerServices services = new HandlerServices(config.Services);
ICommandHandlerTypeResolver newLocalService = new Mock <ICommandHandlerTypeResolver>().Object;
services.Replace(typeof(ICommandHandlerTypeResolver), newLocalService);
// Act
ICommandHandlerTypeResolver localVal = (ICommandHandlerTypeResolver)services.GetService(typeof(ICommandHandlerTypeResolver));
ICommandHandlerTypeResolver globalVal = (ICommandHandlerTypeResolver)config.Services.GetService(typeof(ICommandHandlerTypeResolver));
// Assert
// Local handler didn't override, should get same value as global case.
Assert.Same(newDiService, globalVal); // asking the config will give back the DI service
Assert.Same(newLocalService, localVal); // but asking locally will get back the local service.
}
public void WhenGettingServicesWithoutOverrideThenReturnsSameAsOriginals()
{
ProcessorConfiguration config = new ProcessorConfiguration();
HandlerServices services = new HandlerServices(config.Services);
// Act
var localVal = services.GetServices(typeof(IFilterProvider));
var globalVal = config.Services.GetServices(typeof(IFilterProvider));
// Assert
// Local handler didn't override, should get same value as global case.
Assert.Equal(localVal.ToArray(), globalVal.ToArray());
}
public void WhenGettingServiceWithoutOverrideThenReturnsSameAsOriginal()
{
ProcessorConfiguration config = new ProcessorConfiguration();
HandlerServices services = new HandlerServices(config.Services);
// Act
ICommandHandlerTypeResolver localVal = (ICommandHandlerTypeResolver)services.GetService(typeof(ICommandHandlerTypeResolver));
ICommandHandlerTypeResolver globalVal = (ICommandHandlerTypeResolver)config.Services.GetService(typeof(ICommandHandlerTypeResolver));
// Assert
// Local handler didn't override, should get same value as global case.
Assert.Same(localVal, globalVal);
}
public void WhenSettingOverrideToNullThenReturnsNull()
{
ProcessorConfiguration config = new ProcessorConfiguration();
ServicesContainer global = config.Services;
HandlerServices services = new HandlerServices(global);
// Act
// Setting to null is not the same as clear. Clear() means fall through to global config.
services.Replace(typeof(ICommandHandlerTypeResolver), null);
// Assert
ICommandHandlerTypeResolver localVal = (ICommandHandlerTypeResolver)services.GetService(typeof(ICommandHandlerTypeResolver));
Assert.Null(localVal);
}
public void WhenGettingServiceWithOverrideThenReturnsOverride()
{
ProcessorConfiguration config = new ProcessorConfiguration();
HandlerServices services = new HandlerServices(config.Services);
ICommandHandlerTypeResolver newLocalService = new Mock <ICommandHandlerTypeResolver>().Object;
services.Replace(typeof(ICommandHandlerTypeResolver), newLocalService);
// Act
ICommandHandlerTypeResolver localVal = (ICommandHandlerTypeResolver)services.GetService(typeof(ICommandHandlerTypeResolver));
ICommandHandlerTypeResolver globalVal = (ICommandHandlerTypeResolver)config.Services.GetService(typeof(ICommandHandlerTypeResolver));
// Assert
// Local handler didn't override, should get same value as global case.
Assert.Same(localVal, newLocalService);
Assert.NotSame(localVal, globalVal);
}
public void WhenClearingOverridedServiceThenReturnsOriginal()
{
ProcessorConfiguration config = new ProcessorConfiguration();
ServicesContainer global = config.Services;
HandlerServices services = new HandlerServices(global);
ICommandHandlerTypeResolver newLocalService = new Mock <ICommandHandlerTypeResolver>().Object;
services.Replace(typeof(ICommandHandlerTypeResolver), newLocalService);
// Act
services.Clear(typeof(ICommandHandlerTypeResolver));
// Assert
ICommandHandlerTypeResolver localVal = (ICommandHandlerTypeResolver)services.GetService(typeof(ICommandHandlerTypeResolver));
ICommandHandlerTypeResolver globalVal = (ICommandHandlerTypeResolver)global.GetService(typeof(ICommandHandlerTypeResolver));
Assert.Same(globalVal, localVal);
}
public void WhenAddingServiceToOverrideThenOriginalIsNotMutated()
{
// Handler Services has "copy on write" semantics for inherited list.
// It can get the inherited list and mutate it.
ProcessorConfiguration config = new ProcessorConfiguration();
ServicesContainer global = config.Services;
HandlerServices services = new HandlerServices(global);
IFilterProvider resolver = new Mock <IFilterProvider>().Object;
// Act
services.Add(typeof(IFilterProvider), resolver); // appends to end
// Assert
IEnumerable <object> original = global.GetServices(typeof(IFilterProvider));
object[] modified = services.GetServices(typeof(IFilterProvider)).ToArray();
Assert.True(original.Count() > 1);
object[] expected = original.Concat(new object[] { resolver }).ToArray();
Assert.Equal(expected, modified);
}
