/// <summary>
/// Creates and activates a <see cref="ITagHelper"/>.
/// </summary>
/// <typeparam name="TTagHelper">A <see cref="ITagHelper"/> type.</typeparam>
/// <returns>The activated <see cref="ITagHelper"/>.</returns>
/// <remarks>
/// <typeparamref name="TTagHelper"/> must have a parameterless constructor.
/// </remarks>
public TTagHelper CreateTagHelper <TTagHelper>() where TTagHelper : ITagHelper
{
var tagHelper = TypeActivatorCache.CreateInstance <TTagHelper>(
ViewContext.HttpContext.RequestServices,
typeof(TTagHelper));
TagHelperActivator.Activate(tagHelper, ViewContext);
return(tagHelper);
}
private static TestRazorPage CreateTestRazorPage()
{
var modelMetadataProvider = new EmptyModelMetadataProvider();
var modelExpressionProvider = new ModelExpressionProvider(modelMetadataProvider, new ExpressionTextCache());
var activator = new RazorPageActivator(
modelMetadataProvider,
new UrlHelperFactory(),
new JsonHelper(
new JsonOutputFormatter(new JsonSerializerSettings(), ArrayPool <char> .Shared),
ArrayPool <char> .Shared),
new DiagnosticListener("Microsoft.AspNetCore"),
new HtmlTestEncoder(),
modelExpressionProvider);
var serviceProvider = new Mock <IServiceProvider>();
var typeActivator = new TypeActivatorCache();
var tagHelperActivator = new DefaultTagHelperActivator(typeActivator);
var myService = new MyService();
serviceProvider.Setup(mock => mock.GetService(typeof(MyService)))
.Returns(myService);
serviceProvider.Setup(mock => mock.GetService(typeof(ITagHelperFactory)))
.Returns(new DefaultTagHelperFactory(tagHelperActivator));
serviceProvider.Setup(mock => mock.GetService(typeof(ITagHelperActivator)))
.Returns(tagHelperActivator);
serviceProvider.Setup(mock => mock.GetService(typeof(ITypeActivatorCache)))
.Returns(typeActivator);
serviceProvider.Setup(mock => mock.GetService(It.Is <Type>(serviceType =>
serviceType.GetTypeInfo().IsGenericType&& serviceType.GetGenericTypeDefinition() == typeof(IEnumerable <>))))
.Returns <Type>(serviceType =>
{
var enumerableType = serviceType.GetGenericArguments().First();
return(typeof(Enumerable).GetMethod("Empty").MakeGenericMethod(enumerableType).Invoke(null, null));
});
var httpContext = new Mock <HttpContext>();
httpContext.SetupGet(c => c.RequestServices)
.Returns(serviceProvider.Object);
var actionContext = new ActionContext(httpContext.Object, new RouteData(), new ActionDescriptor());
var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary());
var viewContext = new ViewContext(
actionContext,
Mock.Of <IView>(),
viewData,
Mock.Of <ITempDataDictionary>(),
TextWriter.Null,
new HtmlHelperOptions());
return(new TestRazorPage
{
ViewContext = viewContext
});
}
private static TestRazorPage CreateTestRazorPage()
{
var activator = new RazorPageActivator(new EmptyModelMetadataProvider());
var serviceProvider = new Mock <IServiceProvider>();
var typeActivator = new TypeActivatorCache();
var tagHelperActivator = new DefaultTagHelperActivator(typeActivator);
var myService = new MyService();
serviceProvider.Setup(mock => mock.GetService(typeof(MyService)))
.Returns(myService);
serviceProvider.Setup(mock => mock.GetService(typeof(ITagHelperFactory)))
.Returns(new DefaultTagHelperFactory(tagHelperActivator));
serviceProvider.Setup(mock => mock.GetService(typeof(ITagHelperActivator)))
.Returns(tagHelperActivator);
serviceProvider.Setup(mock => mock.GetService(typeof(ITypeActivatorCache)))
.Returns(typeActivator);
serviceProvider.Setup(mock => mock.GetService(It.Is <Type>(serviceType =>
serviceType.GetTypeInfo().IsGenericType&& serviceType.GetGenericTypeDefinition() == typeof(IEnumerable <>))))
.Returns <Type>(serviceType =>
{
var enumerableType = serviceType.GetGenericArguments().First();
return(typeof(Enumerable).GetMethod("Empty").MakeGenericMethod(enumerableType).Invoke(null, null));
});
var httpContext = new Mock <HttpContext>();
httpContext.SetupGet(c => c.RequestServices)
.Returns(serviceProvider.Object);
var actionContext = new ActionContext(httpContext.Object, new RouteData(), new ActionDescriptor());
var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider());
var viewContext = new ViewContext(
actionContext,
Mock.Of <IView>(),
viewData,
Mock.Of <ITempDataDictionary>(),
TextWriter.Null,
new HtmlHelperOptions());
return(new TestRazorPage
{
ViewContext = viewContext
});
}
public ControllerActivator(IConfigurationRoot configuration)
{
typeActivatorCache = new TypeActivatorCache();
defaultActivator = new DefaultControllerActivator(typeActivatorCache);
this.configuration = configuration;
}
/// <summary>
/// Resolves a type using the type activator cache, just as ASP.NET Core does
/// </summary>
/// <typeparam name="T">The type to resolve</typeparam>
/// <returns>The resolved type, or null if cannot be resolved</returns>
protected T ResolveType <T>(ServiceProvider serviceProvider)
{
TypeActivatorCache typeActivatorCache = new TypeActivatorCache();
return(typeActivatorCache.CreateInstance <T>(serviceProvider, typeof(T)));
}
public ControllerActivator(IConfigurationRoot config)
{
Configuration = config;
TypeActivatorCache = new TypeActivatorCache();
DefaultActivator = new DefaultControllerActivator(TypeActivatorCache);
}
