/test/System.Web.Mvc.Test/Test/ControllerActionInvokerTest.cs

using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Reflection;
using System.Threading;
using Microsoft.Web.UnitTestUtil;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;

namespace System.Web.Mvc.Test
{
    [CLSCompliant(false)]
    public class ControllerActionInvokerTest
    {
        [Fact]
        public void CreateActionResultWithActionResultParameterReturnsParameterUnchanged()
        {
            // Arrange
            ControllerActionInvokerHelper invoker = new ControllerActionInvokerHelper();
            ActionResult originalResult = new JsonResult();

            // Act
            ActionResult returnedActionResult = invoker.PublicCreateActionResult(null, null, originalResult);

            // Assert
            Assert.Same(originalResult, returnedActionResult);
        }

        [Fact]
        public void CreateActionResultWithNullParameterReturnsEmptyResult()
        {
            // Arrange
            ControllerActionInvokerHelper invoker = new ControllerActionInvokerHelper();

            // Act
            ActionResult returnedActionResult = invoker.PublicCreateActionResult(null, null, null);

            // Assert
            Assert.IsType<EmptyResult>(returnedActionResult);
        }

        [Fact]
        public void CreateActionResultWithObjectParameterReturnsContentResult()
        {
            // Arrange
            ControllerActionInvokerHelper invoker = new ControllerActionInvokerHelper();
            object originalReturnValue = new CultureReflector();

            // Act
            ActionResult returnedActionResult = invoker.PublicCreateActionResult(null, null, originalReturnValue);

            // Assert
            ContentResult contentResult = Assert.IsType<ContentResult>(returnedActionResult);
            Assert.Equal("ivl", contentResult.Content);
        }

        [Fact]
        public void FindAction()
        {
            // Arrange
            EmptyController controller = new EmptyController();
            ControllerContext controllerContext = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ActionDescriptor expectedAd = new Mock<ActionDescriptor>().Object;
            Mock<ControllerDescriptor> mockCd = new Mock<ControllerDescriptor>();
            mockCd.Setup(cd => cd.FindAction(controllerContext, "someAction")).Returns(expectedAd);

            // Act
            ActionDescriptor returnedAd = helper.PublicFindAction(controllerContext, mockCd.Object, "someAction");

            // Assert
            Assert.Equal(expectedAd, returnedAd);
        }

        [Fact]
        public void FindActionDoesNotMatchConstructor()
        {
            // FindActionMethod() shouldn't match special-named methods like type constructors.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, ".ctor");
            ActionDescriptor ad2 = helper.PublicFindAction(context, cd, "FindMethodController");

            // Assert
            Assert.Null(ad);
            Assert.Null(ad2);
        }

        [Fact]
        public void FindActionDoesNotMatchEvent()
        {
            // FindActionMethod() should skip methods that aren't publicly visible.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "add_Event");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchInternalMethod()
        {
            // FindActionMethod() should skip methods that aren't publicly visible.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "InternalMethod");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchMethodsDefinedOnControllerType()
        {
            // FindActionMethod() shouldn't match methods originally defined on the Controller type, e.g. Dispose().

            // Arrange
            Controller controller = new BlankController();
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(BlankController));
            ControllerContext context = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            var methods = typeof(Controller).GetMethods(BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);

            // Act & Assert
            foreach (var method in methods)
            {
                bool wasFound = true;
                try
                {
                    ActionDescriptor ad = helper.PublicFindAction(context, cd, method.Name);
                    wasFound = (ad != null);
                }
                finally
                {
                    Assert.False(wasFound, "FindAction() should return false for methods defined on the Controller class: " + method);
                }
            }
        }

        [Fact]
        public void FindActionDoesNotMatchMethodsDefinedOnObjectType()
        {
            // FindActionMethod() shouldn't match methods originally defined on the Object type, e.g. ToString().

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "ToString");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchNonActionMethod()
        {
            // FindActionMethod() should respect the [NonAction] attribute.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "NonActionMethod");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchOverriddenNonActionMethod()
        {
            // FindActionMethod() should trace the method's inheritance chain looking for the [NonAction] attribute.

            // Arrange
            Controller controller = new DerivedFindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(DerivedFindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "InternalMethod");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchPrivateMethod()
        {
            // FindActionMethod() should skip methods that aren't publicly visible.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "PrivateMethod");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchProperty()
        {
            // FindActionMethod() shouldn't match special-named methods like property getters.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "get_Property");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionDoesNotMatchProtectedMethod()
        {
            // FindActionMethod() should skip methods that aren't publicly visible.

            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "ProtectedMethod");

            // Assert
            Assert.Null(ad);
        }

        [Fact]
        public void FindActionIsCaseInsensitive()
        {
            // Arrange
            Controller controller = new FindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(FindMethodController));
            MethodInfo expectedMethodInfo = typeof(FindMethodController).GetMethod("ValidActionMethod");

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad1 = helper.PublicFindAction(context, cd, "validactionmethod");
            ActionDescriptor ad2 = helper.PublicFindAction(context, cd, "VALIDACTIONMETHOD");

            // Assert
            ReflectedActionDescriptor rad1 = Assert.IsType<ReflectedActionDescriptor>(ad1);
            Assert.Same(expectedMethodInfo, rad1.MethodInfo);
            ReflectedActionDescriptor rad2 = Assert.IsType<ReflectedActionDescriptor>(ad2);
            Assert.Same(expectedMethodInfo, rad2.MethodInfo);
        }

        [Fact]
        public void FindActionMatchesActionMethodWithClosedGenerics()
        {
            // FindActionMethod() should work with generic methods as long as there are no open types.

            // Arrange
            Controller controller = new GenericFindMethodController<int>();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(GenericFindMethodController<int>));
            MethodInfo expectedMethodInfo = typeof(GenericFindMethodController<int>).GetMethod("ClosedGenericMethod");

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "ClosedGenericMethod");

            // Assert
            ReflectedActionDescriptor rad = Assert.IsType<ReflectedActionDescriptor>(ad);
            Assert.Same(expectedMethodInfo, rad.MethodInfo);
        }

        [Fact]
        public void FindActionMatchesNewActionMethodsHidingNonActionMethods()
        {
            // FindActionMethod() should stop looking for [NonAction] in the method's inheritance chain when it sees
            // that a method in a derived class hides the a method in the base class.

            // Arrange
            Controller controller = new DerivedFindMethodController();
            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new ReflectedControllerDescriptor(typeof(DerivedFindMethodController));
            MethodInfo expectedMethodInfo = typeof(DerivedFindMethodController).GetMethod("DerivedIsActionMethod");

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ActionDescriptor ad = helper.PublicFindAction(context, cd, "DerivedIsActionMethod");

            // Assert
            ReflectedActionDescriptor rad = Assert.IsType<ReflectedActionDescriptor>(ad);
            Assert.Same(expectedMethodInfo, rad.MethodInfo);
        }

        [Fact]
        public void GetControllerDescriptor()
        {
            // Arrange
            EmptyController controller = new EmptyController();
            ControllerContext controllerContext = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            // Act
            ControllerDescriptor cd = helper.PublicGetControllerDescriptor(controllerContext);

            // Assert
            Assert.IsType<ReflectedControllerDescriptor>(cd);
            Assert.Equal(typeof(EmptyController), cd.ControllerType);
        }

        [Fact]
        public void GetFiltersSplitsFilterObjectsIntoFilterInfo()
        {
            // Arrange
            IActionFilter actionFilter = new Mock<IActionFilter>().Object;
            IResultFilter resultFilter = new Mock<IResultFilter>().Object;
            IAuthorizationFilter authFilter = new Mock<IAuthorizationFilter>().Object;
            IExceptionFilter exFilter = new Mock<IExceptionFilter>().Object;
            object noneOfTheAbove = new object();
            ControllerActionInvokerHelper invoker = new ControllerActionInvokerHelper(actionFilter, authFilter, exFilter, resultFilter, noneOfTheAbove);
            ControllerContext context = new ControllerContext();
            ActionDescriptor descriptor = new Mock<ActionDescriptor>().Object;

            // Act
            FilterInfo result = invoker.PublicGetFilters(context, descriptor);

            // Assert
            Assert.Same(actionFilter, result.ActionFilters.Single());
            Assert.Same(authFilter, result.AuthorizationFilters.Single());
            Assert.Same(exFilter, result.ExceptionFilters.Single());
            Assert.Same(resultFilter, result.ResultFilters.Single());
        }

        [Fact]
        public void GetParameterValueAllowsAllSubpropertiesIfBindAttributeNotSpecified()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            ControllerContext controllerContext = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithoutBindAttribute = typeof(CustomConverterController).GetMethod("ParameterWithoutBindAttribute").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithoutBindAttribute, new Mock<ActionDescriptor>().Object);

            // Act
            object valueWithoutBindAttribute = helper.PublicGetParameterValue(controllerContext, pd);

            // Assert
            Assert.Equal("foo=True&bar=True", valueWithoutBindAttribute);
        }

        [Fact]
        public void GetParameterValueResolvesConvertersInCorrectOrderOfPrecedence()
        {
            // Order of precedence:
            //   1. Attributes on the parameter itself
            //   2. Query the global converter provider

            // Arrange
            CustomConverterController controller = new CustomConverterController();
            Dictionary<string, object> values = new Dictionary<string, object> { { "foo", "fooValue" } };
            ControllerContext controllerContext = GetControllerContext(controller, values);
            controller.ControllerContext = controllerContext;
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithOneConverter = typeof(CustomConverterController).GetMethod("ParameterHasOneConverter").GetParameters()[0];
            ReflectedParameterDescriptor pdOneConverter = new ReflectedParameterDescriptor(paramWithOneConverter, new Mock<ActionDescriptor>().Object);
            ParameterInfo paramWithNoConverters = typeof(CustomConverterController).GetMethod("ParameterHasNoConverters").GetParameters()[0];
            ReflectedParameterDescriptor pdNoConverters = new ReflectedParameterDescriptor(paramWithNoConverters, new Mock<ActionDescriptor>().Object);

            // Act
            object valueWithOneConverter = helper.PublicGetParameterValue(controllerContext, pdOneConverter);
            object valueWithNoConverters = helper.PublicGetParameterValue(controllerContext, pdNoConverters);

            // Assert
            Assert.Equal("foo_String", valueWithOneConverter);
            Assert.Equal("fooValue", valueWithNoConverters);
        }

        [Fact]
        public void GetParameterValueRespectsBindAttribute()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            ControllerContext controllerContext = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithBindAttribute = typeof(CustomConverterController).GetMethod("ParameterHasBindAttribute").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithBindAttribute, new Mock<ActionDescriptor>().Object);

            // Act
            object valueWithBindAttribute = helper.PublicGetParameterValue(controllerContext, pd);

            // Assert
            Assert.Equal("foo=True&bar=False", valueWithBindAttribute);
        }

        [Fact]
        public void GetParameterValueRespectsBindAttributePrefix()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            Dictionary<string, object> values = new Dictionary<string, object> { { "foo", "fooValue" }, { "bar", "barValue" } };
            ControllerContext controllerContext = GetControllerContext(controller, values);
            controller.ControllerContext = controllerContext;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithFieldPrefix = typeof(CustomConverterController).GetMethod("ParameterHasFieldPrefix").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithFieldPrefix, new Mock<ActionDescriptor>().Object);

            // Act
            object parameterValue = helper.PublicGetParameterValue(controllerContext, pd);

            // Assert
            Assert.Equal("barValue", parameterValue);
        }

        [Fact]
        public void GetParameterValueRespectsBindAttributePrefixOnComplexType()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            Dictionary<string, object> values = new Dictionary<string, object> { { "intprop", "123" }, { "stringprop", "hello" } };
            ControllerContext controllerContext = GetControllerContext(controller, values);
            controller.ControllerContext = controllerContext;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithFieldPrefix = typeof(CustomConverterController).GetMethod("ParameterHasPrefixAndComplexType").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithFieldPrefix, new Mock<ActionDescriptor>().Object);

            // Act
            MySimpleModel parameterValue = helper.PublicGetParameterValue(controllerContext, pd) as MySimpleModel;

            // Assert
            Assert.Null(parameterValue);
        }

        [Fact]
        public void GetParameterValueRespectsBindAttributeNullPrefix()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            Dictionary<string, object> values = new Dictionary<string, object> { { "foo", "fooValue" }, { "bar", "barValue" } };
            ControllerContext controllerContext = GetControllerContext(controller, values);
            controller.ControllerContext = controllerContext;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithFieldPrefix = typeof(CustomConverterController).GetMethod("ParameterHasNullFieldPrefix").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithFieldPrefix, new Mock<ActionDescriptor>().Object);

            // Act
            object parameterValue = helper.PublicGetParameterValue(controllerContext, pd);

            // Assert
            Assert.Equal("fooValue", parameterValue);
        }

        [Fact]
        public void GetParameterValueRespectsBindAttributeNullPrefixOnComplexType()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            Dictionary<string, object> values = new Dictionary<string, object> { { "intprop", "123" }, { "stringprop", "hello" } };
            ControllerContext controllerContext = GetControllerContext(controller, values);
            controller.ControllerContext = controllerContext;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithFieldPrefix = typeof(CustomConverterController).GetMethod("ParameterHasNoPrefixAndComplexType").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithFieldPrefix, new Mock<ActionDescriptor>().Object);

            // Act
            MySimpleModel parameterValue = helper.PublicGetParameterValue(controllerContext, pd) as MySimpleModel;

            // Assert
            Assert.NotNull(parameterValue);
            Assert.Equal(123, parameterValue.IntProp);
            Assert.Equal("hello", parameterValue.StringProp);
        }

        [Fact]
        public void GetParameterValueRespectsBindAttributeEmptyPrefix()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            Dictionary<string, object> values = new Dictionary<string, object> { { "foo", "fooValue" }, { "bar", "barValue" }, { "intprop", "123" }, { "stringprop", "hello" } };
            ControllerContext controllerContext = GetControllerContext(controller, values);
            controller.ControllerContext = controllerContext;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo paramWithFieldPrefix = typeof(CustomConverterController).GetMethod("ParameterHasEmptyFieldPrefix").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithFieldPrefix, new Mock<ActionDescriptor>().Object);

            // Act
            MySimpleModel parameterValue = helper.PublicGetParameterValue(controllerContext, pd) as MySimpleModel;

            // Assert
            Assert.NotNull(parameterValue);
            Assert.Equal(123, parameterValue.IntProp);
            Assert.Equal("hello", parameterValue.StringProp);
        }

        [Fact]
        public void GetParameterValueRespectsDefaultValueAttribute()
        {
            // Arrange
            CustomConverterController controller = new CustomConverterController();
            ControllerContext controllerContext = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            controller.ValueProvider = new SimpleValueProvider();

            ParameterInfo paramWithDefaultValueAttribute = typeof(CustomConverterController).GetMethod("ParameterHasDefaultValueAttribute").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(paramWithDefaultValueAttribute, new Mock<ActionDescriptor>().Object);

            // Act
            object valueWithDefaultValueAttribute = helper.PublicGetParameterValue(controllerContext, pd);

            // Assert
            Assert.Equal(42, valueWithDefaultValueAttribute);
        }

        [Fact]
        public void GetParameterValueReturnsNullIfCannotConvertNonRequiredParameter()
        {
            // Arrange
            Dictionary<string, object> dict = new Dictionary<string, object>()
            {
                { "id", DateTime.Now } // cannot convert DateTime to Nullable<int>
            };
            var controller = new ParameterTestingController();
            ControllerContext context = GetControllerContext(controller, dict);
            controller.ControllerContext = context;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            MethodInfo mi = typeof(ParameterTestingController).GetMethod("TakesNullableInt");
            ParameterInfo[] pis = mi.GetParameters();
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(pis[0], new Mock<ActionDescriptor>().Object);

            // Act
            object oValue = helper.PublicGetParameterValue(context, pd);

            // Assert
            Assert.Null(oValue);
        }

        [Fact]
        public void GetParameterValueReturnsNullIfNullableTypeValueNotFound()
        {
            // Arrange
            var controller = new ParameterTestingController();
            ControllerContext context = GetControllerContext(controller);
            controller.ControllerContext = context;
            controller.ValueProvider = new SimpleValueProvider();

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            MethodInfo mi = typeof(ParameterTestingController).GetMethod("TakesNullableInt");
            ParameterInfo[] pis = mi.GetParameters();
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(pis[0], new Mock<ActionDescriptor>().Object);

            // Act
            object oValue = helper.PublicGetParameterValue(context, pd);

            // Assert
            Assert.Null(oValue);
        }

        [Fact]
        public void GetParameterValueReturnsNullIfReferenceTypeValueNotFound()
        {
            // Arrange
            var controller = new ParameterTestingController();
            ControllerContext context = GetControllerContext(controller);
            controller.ControllerContext = context;
            controller.ValueProvider = new SimpleValueProvider();

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            MethodInfo mi = typeof(ParameterTestingController).GetMethod("Foo");
            ParameterInfo[] pis = mi.GetParameters();
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(pis[0], new Mock<ActionDescriptor>().Object);

            // Act
            object oValue = helper.PublicGetParameterValue(context, pd);

            // Assert
            Assert.Null(oValue);
        }

        [Fact]
        public void GetParameterValuesCallsGetParameterValue()
        {
            // Arrange
            ControllerBase controller = new ParameterTestingController();
            IDictionary<string, object> dict = new Dictionary<string, object>();
            ControllerContext context = GetControllerContext(controller);
            MethodInfo mi = typeof(ParameterTestingController).GetMethod("Foo");
            ReflectedActionDescriptor ad = new ReflectedActionDescriptor(mi, "Foo", new Mock<ControllerDescriptor>().Object);
            ParameterDescriptor[] pds = ad.GetParameters();

            Mock<ControllerActionInvokerHelper> mockHelper = new Mock<ControllerActionInvokerHelper>() { CallBase = true };
            mockHelper.Setup(h => h.PublicGetParameterValue(context, pds[0])).Returns("Myfoo").Verifiable();
            mockHelper.Setup(h => h.PublicGetParameterValue(context, pds[1])).Returns("Mybar").Verifiable();
            mockHelper.Setup(h => h.PublicGetParameterValue(context, pds[2])).Returns("Mybaz").Verifiable();
            ControllerActionInvokerHelper helper = mockHelper.Object;

            // Act
            IDictionary<string, object> parameters = helper.PublicGetParameterValues(context, ad);

            // Assert
            Assert.Equal(3, parameters.Count);
            Assert.Equal("Myfoo", parameters["foo"]);
            Assert.Equal("Mybar", parameters["bar"]);
            Assert.Equal("Mybaz", parameters["baz"]);
            mockHelper.Verify();
        }

        [Fact]
        public void GetParameterValuesReturnsEmptyDictionaryForParameterlessMethod()
        {
            // Arrange
            var controller = new ParameterTestingController();
            ControllerContext context = GetControllerContext(controller);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            MethodInfo mi = typeof(ParameterTestingController).GetMethod("Parameterless");
            ReflectedActionDescriptor ad = new ReflectedActionDescriptor(mi, "Parameterless", new Mock<ControllerDescriptor>().Object);

            // Act
            IDictionary<string, object> parameters = helper.PublicGetParameterValues(context, ad);

            // Assert
            Assert.Empty(parameters);
        }

        [Fact]
        public void GetParameterValuesReturnsValuesForParametersInOrder()
        {
            // We need to hook into GetParameterValue() to make sure that GetParameterValues() is calling it.

            // Arrange
            var controller = new ParameterTestingController();
            Dictionary<string, object> dict = new Dictionary<string, object>()
            {
                { "foo", "MyFoo" },
                { "bar", "MyBar" },
                { "baz", "MyBaz" }
            };
            ControllerContext context = GetControllerContext(controller, dict);
            controller.ControllerContext = context;

            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();
            MethodInfo mi = typeof(ParameterTestingController).GetMethod("Foo");
            ReflectedActionDescriptor ad = new ReflectedActionDescriptor(mi, "Foo", new Mock<ControllerDescriptor>().Object);

            // Act
            IDictionary<string, object> parameters = helper.PublicGetParameterValues(context, ad);

            // Assert
            Assert.Equal(3, parameters.Count);
            Assert.Equal("MyFoo", parameters["foo"]);
            Assert.Equal("MyBar", parameters["bar"]);
            Assert.Equal("MyBaz", parameters["baz"]);
        }

        [Fact]
        public void GetParameterValueUsesControllerValueProviderAsValueProvider()
        {
            // Arrange
            Dictionary<string, object> values = new Dictionary<string, object>()
            {
                { "foo", "fooValue" }
            };

            CustomConverterController controller = new CustomConverterController();
            ControllerContext controllerContext = GetControllerContext(controller, values);
            ControllerActionInvokerHelper helper = new ControllerActionInvokerHelper();

            ParameterInfo parameter = typeof(CustomConverterController).GetMethod("ParameterHasNoConverters").GetParameters()[0];
            ReflectedParameterDescriptor pd = new ReflectedParameterDescriptor(parameter, new Mock<ActionDescriptor>().Object);

            // Act
            object parameterValue = helper.PublicGetParameterValue(controllerContext, pd);

            // Assert
            Assert.Equal("fooValue", parameterValue);
        }

        [Fact]
        public void InvokeAction()
        {
            // Arrange
            ControllerBase controller = new Mock<ControllerBase>().Object;

            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new Mock<ControllerDescriptor>().Object;
            ActionDescriptor ad = new Mock<ActionDescriptor>().Object;
            FilterInfo filterInfo = new FilterInfo();

            IDictionary<string, object> parameters = new Dictionary<string, object>();
            MethodInfo methodInfo = typeof(object).GetMethod("ToString");
            ActionResult actionResult = new EmptyResult();
            ActionExecutedContext postContext = new ActionExecutedContext(context, ad, false /* canceled */, null /* exception */)
            {
                Result = actionResult
            };
            AuthorizationContext authContext = new AuthorizationContext();

            Mock<ControllerActionInvokerHelper> mockHelper = new Mock<ControllerActionInvokerHelper>() { CallBase = true };
            mockHelper.Setup(h => h.PublicGetControllerDescriptor(context)).Returns(cd).Verifiable();
            mockHelper.Setup(h => h.PublicFindAction(context, cd, "SomeMethod")).Returns(ad).Verifiable();
            mockHelper.Setup(h => h.PublicGetFilters(context, ad)).Returns(filterInfo).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeAuthorizationFilters(context, filterInfo.AuthorizationFilters, ad)).Returns(authContext).Verifiable();
            mockHelper.Setup(h => h.PublicGetParameterValues(context, ad)).Returns(parameters).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeActionMethodWithFilters(context, filterInfo.ActionFilters, ad, parameters)).Returns(postContext).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeActionResultWithFilters(context, filterInfo.ResultFilters, actionResult)).Returns((ResultExecutedContext)null).Verifiable();
            ControllerActionInvokerHelper helper = mockHelper.Object;

            // Act
            bool retVal = helper.InvokeAction(context, "SomeMethod");
            Assert.True(retVal);
            mockHelper.Verify();
        }

        [Fact]
        public void InvokeActionCallsValidateRequestIfAsked()
        {
            // Arrange
            ControllerBase controller = new Mock<ControllerBase>().Object;
            controller.ValidateRequest = true;
            bool validateInputWasCalled = false;

            ControllerContext context = GetControllerContext(controller, null, validateInputCallback: () => { validateInputWasCalled = true; });
            ControllerDescriptor cd = new Mock<ControllerDescriptor>().Object;
            ActionDescriptor ad = new Mock<ActionDescriptor>().Object;
            FilterInfo filterInfo = new FilterInfo();
            AuthorizationContext authContext = new AuthorizationContext();

            Mock<ControllerActionInvokerHelper> mockHelper = new Mock<ControllerActionInvokerHelper>();
            mockHelper.CallBase = true;
            mockHelper.Setup(h => h.PublicGetControllerDescriptor(context)).Returns(cd).Verifiable();
            mockHelper.Setup(h => h.PublicFindAction(context, cd, "SomeMethod")).Returns(ad).Verifiable();
            mockHelper.Setup(h => h.PublicGetFilters(context, ad)).Returns(filterInfo).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeAuthorizationFilters(context, filterInfo.AuthorizationFilters, ad)).Returns(authContext).Verifiable();
            ControllerActionInvokerHelper helper = mockHelper.Object;

            // Act
            helper.InvokeAction(context, "SomeMethod");

            // Assert
            Assert.True(validateInputWasCalled);
            mockHelper.Verify();
        }

        [Fact]
        public void InvokeActionDoesNotCallValidateRequestForChildActions()
        {
            // Arrange
            ControllerBase controller = new Mock<ControllerBase>().Object;
            controller.ValidateRequest = true;

            ControllerContext context = GetControllerContext(controller, null);
            Mock.Get<ControllerContext>(context).SetupGet(c => c.IsChildAction).Returns(true);
            ControllerDescriptor cd = new Mock<ControllerDescriptor>().Object;
            ActionDescriptor ad = new Mock<ActionDescriptor>().Object;
            FilterInfo filterInfo = new FilterInfo();
            AuthorizationContext authContext = new AuthorizationContext();

            Mock<ControllerActionInvokerHelper> mockHelper = new Mock<ControllerActionInvokerHelper>();
            mockHelper.CallBase = true;
            mockHelper.Setup(h => h.PublicGetControllerDescriptor(context)).Returns(cd).Verifiable();
            mockHelper.Setup(h => h.PublicFindAction(context, cd, "SomeMethod")).Returns(ad).Verifiable();
            mockHelper.Setup(h => h.PublicGetFilters(context, ad)).Returns(filterInfo).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeAuthorizationFilters(context, filterInfo.AuthorizationFilters, ad)).Returns(authContext).Verifiable();
            ControllerActionInvokerHelper helper = mockHelper.Object;

            // Act
            helper.InvokeAction(context, "SomeMethod"); // No exception thrown

            // Assert
            mockHelper.Verify();
        }

        [Fact]
        public void InvokeActionMethodFilterWhereContinuationThrowsExceptionAndIsHandled()
        {
            // Arrange
            List<string> actions = new List<string>();
            MethodInfo mi = typeof(object).GetMethod("ToString");
            Dictionary<string, object> parameters = new Dictionary<string, object>();
            Exception exception = new Exception();
            ActionDescriptor action = new Mock<ActionDescriptor>().Object;

            ActionFilterImpl filter = new ActionFilterImpl()
            {
                OnActionExecutingImpl = delegate(ActionExecutingContext filterContext) { actions.Add("OnActionExecuting"); },
                OnActionExecutedImpl = delegate(ActionExecutedContext filterContext)
                {
                    actions.Add("OnActionExecuted");
                    Assert.Same(exception, filterContext.Exception);
                    Assert.Same(action, filterContext.ActionDescriptor);
                    Assert.False(filterContext.ExceptionHandled);
                    filterContext.ExceptionHandled = true;
                }
            };
            Func<ActionExecutedContext> continuation = delegate
            {
                actions.Add("Continuation");
                throw exception;
            };

            ActionExecutingContext context = new ActionExecutingContext(GetControllerContext(new EmptyController()), action, parameters);

            // Act
            ActionExecutedContext result = ControllerActionInvoker.InvokeActionMethodFilter(filter, context, continuation);

            // Assert
            Assert.Equal(3, actions.Count);
            Assert.Equal("OnActionExecuting", actions[0]);
            Assert.Equal("Continuation", actions[1]);
            Assert.Equal("OnActionExecuted", actions[2]);
            Assert.Same(exception, result.Exception);
            Assert.Same(action, result.ActionDescriptor);
            Assert.True(result.ExceptionHandled);
        }

        [Fact]
        public void InvokeActionMethodFilterWhereContinuationThrowsExceptionAndIsNotHandled()
        {
            // Arrange
            List<string> actions = new List<string>();
            Dictionary<string, object> parameters = new Dictionary<string, object>();
            ActionDescriptor action = new Mock<ActionDescriptor>().Object;

            ActionFilterImpl filter = new ActionFilterImpl()
            {
                OnActionExecutingImpl = delegate(ActionExecutingContext filterContext) { actions.Add("OnActionExecuting"); },
                OnActionExecutedImpl = delegate(ActionExecutedContext filterContext)
                {
                    Assert.NotNull(filterContext.Exception);
                    Assert.Equal("Some exception message.", filterContext.Exception.Message);
                    Assert.Same(action, filterContext.ActionDescriptor);
                    actions.Add("OnActionExecuted");
                }
            };
            Func<ActionExecutedContext> continuation = delegate
            {
                actions.Add("Continuation");
                throw new Exception("Some exception message.");
            };

            ActionExecutingContext context = new ActionExecutingContext(GetControllerContext(new EmptyController()), action, parameters);

            // Act & Assert
            Assert.Throws<Exception>(
                delegate { ControllerActionInvoker.InvokeActionMethodFilter(filter, context, continuation); },
                "Some exception message.");
            Assert.Equal(3, actions.Count);
            Assert.Equal("OnActionExecuting", actions[0]);
            Assert.Equal("Continuation", actions[1]);
            Assert.Equal("OnActionExecuted", actions[2]);
        }

        [Fact]
        public void InvokeActionMethodFilterWhereContinuationThrowsThreadAbortException()
        {
            // Arrange
            List<string> actions = new List<string>();
            ActionResult actionResult = new EmptyResult();
            ActionDescriptor action = new Mock<ActionDescriptor>().Object;

            ActionFilterImpl filter = new ActionFilterImpl()
            {
                OnActionExecutingImpl = delegate(ActionExecutingContext filterContext) { actions.Add("OnActionExecuting"); },
                OnActionExecutedImpl = delegate(ActionExecutedContext filterContext)
                {
                    Thread.ResetAbort();
                    actions.Add("OnActionExecuted");
                    Assert.Null(filterContext.Exception);
                    Assert.False(filterContext.ExceptionHandled);
                    Assert.Same(action, filterContext.ActionDescriptor);
                }
            };
            Func<ActionExecutedContext> continuation = delegate
            {
                actions.Add("Continuation");
                Thread.CurrentThread.Abort();
                return null;
            };

            ActionExecutingContext context = new ActionExecutingContext(new Mock<ControllerContext>().Object, action, new Dictionary<string, object>());

            // Act & Assert
            Assert.Throws<ThreadAbortException>(
                delegate { ControllerActionInvoker.InvokeActionMethodFilter(filter, context, continuation); },
                "Thread was being aborted.");
            Assert.Equal(3, actions.Count);
            Assert.Equal("OnActionExecuting", actions[0]);
            Assert.Equal("Continuation", actions[1]);
            Assert.Equal("OnActionExecuted", actions[2]);
        }

        [Fact]
        public void InvokeActionMethodFilterWhereOnActionExecutingCancels()
        {
            // Arrange
            bool wasCalled = false;
            ActionDescriptor ad = new Mock<ActionDescriptor>().Object;
            Dictionary<string, object> parameters = new Dictionary<string, object>();

            ActionResult actionResult = new EmptyResult();
            ActionDescriptor action = new Mock<ActionDescriptor>().Object;

            ActionFilterImpl filter = new ActionFilterImpl()
            {
                OnActionExecutingImpl = delegate(ActionExecutingContext filterContext)
                {
                    Assert.False(wasCalled);
                    wasCalled = true;
                    filterContext.Result = actionResult;
                },
            };
            Func<ActionExecutedContext> continuation = delegate
            {
                Assert.True(false, "The continuation should not be called.");
                return null;
            };

            ActionExecutingContext context = new ActionExecutingContext(GetControllerContext(new EmptyController()), action, parameters);

            // Act
            ActionExecutedContext result = ControllerActionInvoker.InvokeActionMethodFilter(filter, context, continuation);

            // Assert
            Assert.True(wasCalled);
            Assert.Null(result.Exception);
            Assert.True(result.Canceled);
            Assert.Same(actionResult, result.Result);
            Assert.Same(action, result.ActionDescriptor);
        }

        [Fact]
        public void InvokeActionMethodFilterWithNormalControlFlow()
        {
            // Arrange
            List<string> actions = new List<string>();
            Dictionary<string, object> parameters = new Dictionary<string, object>();
            ActionDescriptor action = new Mock<ActionDescriptor>().Object;

            ActionExecutingContext preContext = new ActionExecutingContext(GetControllerContext(new EmptyController()), action, parameters);
            Mock<ActionExecutedContext> mockPostContext = new Mock<ActionExecutedContext>();

            ActionFilterImpl filter = new ActionFilterImpl()
            {
                OnActionExecutingImpl = delegate(ActionExecutingContext filterContext)
                {
                    Assert.Same(parameters, filterContext.ActionParameters);
                    Assert.Null(filterContext.Result);
                    actions.Add("OnActionExecuting");
                },
                OnActionExecutedImpl = delegate(ActionExecutedContext filterContext)
                {
                    Assert.Equal(mockPostContext.Object, filterContext);
                    actions.Add("OnActionExecuted");
                }
            };
            Func<ActionExecutedContext> continuation = delegate
            {
                actions.Add("Continuation");
                return mockPostContext.Object;
            };

            // Act
            ActionExecutedContext result = ControllerActionInvoker.InvokeActionMethodFilter(filter, preContext, continuation);

            // Assert
            Assert.Equal(3, actions.Count);
            Assert.Equal("OnActionExecuting", actions[0]);
            Assert.Equal("Continuation", actions[1]);
            Assert.Equal("OnActionExecuted", actions[2]);
            Assert.Same(result, mockPostContext.Object);
        }

        [Fact]
        public void InvokeActionInvokesExceptionFiltersAndExecutesResultIfExceptionHandled()
        {
            // Arrange
            ControllerBase controller = new Mock<ControllerBase>().Object;

            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new Mock<ControllerDescriptor>().Object;
            ActionDescriptor ad = new Mock<ActionDescriptor>().Object;
            FilterInfo filterInfo = new FilterInfo();

            Exception exception = new Exception();
            ActionResult actionResult = new EmptyResult();
            ExceptionContext exContext = new ExceptionContext(context, exception)
            {
                ExceptionHandled = true,
                Result = actionResult
            };

            Mock<ControllerActionInvokerHelper> mockHelper = new Mock<ControllerActionInvokerHelper>() { CallBase = true };
            mockHelper.Setup(h => h.PublicGetControllerDescriptor(context)).Returns(cd).Verifiable();
            mockHelper.Setup(h => h.PublicFindAction(context, cd, "SomeMethod")).Returns(ad).Verifiable();
            mockHelper.Setup(h => h.PublicGetFilters(context, ad)).Returns(filterInfo).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeAuthorizationFilters(context, filterInfo.AuthorizationFilters, ad)).Throws(exception).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeExceptionFilters(context, filterInfo.ExceptionFilters, exception)).Returns(exContext).Verifiable();
            mockHelper.Setup(h => h.PublicInvokeActionResult(context, actionResult)).Verifiable();
            ControllerActionInvokerHelper helper = mockHelper.Object;

            // Act
            bool retVal = helper.InvokeAction(context, "SomeMethod");
            Assert.True(retVal);
            mockHelper.Verify();
        }

        [Fact]
        public void InvokeActionInvokesExceptionFiltersAndRethrowsExceptionIfNotHandled()
        {
            // Arrange
            ControllerBase controller = new Mock<ControllerBase>().Object;

            ControllerContext context = GetControllerContext(controller);
            ControllerDescriptor cd = new Mock<ControllerDescriptor>().Object;
            ActionDescriptor ad = new Mock<ActionDescriptor>().Object;
            FilterInfo filterInfo = new FilterInfo();

            Exception exception = new Exception();
            ExceptionContext exContext = new ExceptionContext(context, exception);

            Mock<ControllerActionInvokerHelper> mockHelper = new Mock<ControllerActionInvokerHelper>() { CallBase = true };
            mockHelper.Setup(h => h.PublicGetControllerDescriptor(context)).Returns(cd).Verifiable();
            mockHelper.Setup(h => h.PublicFindAction(context, cd, "