// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.AspNetCore.Mvc.Formatters;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure;
using Microsoft.AspNetCore.Mvc.Routing;
using Microsoft.AspNetCore.Mvc.TestCommon;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Testing;
using Microsoft.Extensions.DependencyInjection;
using Moq;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.RazorPages
{
    public class PageModelTest
    {
        [Fact]
        public void PageContext_GetsInitialized()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            Assert.NotNull(pageModel.PageContext);
        }

        [Fact]
        public void Redirect_WithParameterUrl_SetsRedirectResultSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.Redirect(url);

            // Assert
            Assert.IsType<RedirectResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Fact]
        public void RedirectPermanent_WithParameterUrl_SetsRedirectResultPermanentAndSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.RedirectPermanent(url);

            // Assert
            Assert.IsType<RedirectResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Fact]
        public void RedirectPermanent_WithParameterUrl_SetsRedirectResultPreserveMethodAndSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.RedirectPreserveMethod(url);

            // Assert
            Assert.IsType<RedirectResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Fact]
        public void RedirectPermanent_WithParameterUrl_SetsRedirectResultPermanentPreserveMethodAndSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.RedirectPermanentPreserveMethod(url);

            // Assert
            Assert.IsType<RedirectResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void Redirect_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgument(
                () => pageModel.Redirect(url: url), "url", "Value cannot be null or empty.");
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void RedirectPreserveMethod_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgumentNullOrEmpty(
                () => pageModel.RedirectPreserveMethod(url: url), "url");
        }

        [Fact]
        public void LocalRedirect_WithParameterUrl_SetsLocalRedirectResultWithSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.LocalRedirect(url);

            // Assert
            Assert.IsType<LocalRedirectResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Fact]
        public void LocalRedirectPermanent_WithParameterUrl_SetsLocalRedirectResultPermanentWithSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.LocalRedirectPermanent(url);

            // Assert
            Assert.IsType<LocalRedirectResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Fact]
        public void LocalRedirectPermanent_WithParameterUrl_SetsLocalRedirectResultPreserveMethodWithSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.LocalRedirectPreserveMethod(url);

            // Assert
            Assert.IsType<LocalRedirectResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Fact]
        public void LocalRedirectPermanent_WithParameterUrl_SetsLocalRedirectResultPermanentPreservesMethodWithSameUrl()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.LocalRedirectPermanentPreserveMethod(url);

            // Assert
            Assert.IsType<LocalRedirectResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Same(url, result.Url);
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void LocalRedirect_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgumentNullOrEmpty(
                () => pageModel.LocalRedirect(localUrl: url), "localUrl");
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void LocalRedirectPreserveMethod_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgumentNullOrEmpty(
                () => pageModel.LocalRedirectPreserveMethod(localUrl: url), "localUrl");
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void LocalRedirectPermanentPreserveMethod_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgumentNullOrEmpty(
                () => pageModel.LocalRedirectPermanentPreserveMethod(localUrl: url), "localUrl");
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void RedirectPermanent_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgumentNullOrEmpty(
                () => pageModel.RedirectPermanent(url: url), "url");
        }

        [Theory]
        [InlineData(null)]
        [InlineData("")]
        public void RedirectPermanentPreserveMethod_WithParameter_NullOrEmptyUrl_Throws(string url)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act & Assert
            ExceptionAssert.ThrowsArgumentNullOrEmpty(
                () => pageModel.RedirectPermanentPreserveMethod(url: url), "url");
        }

        [Fact]
        public void RedirectToAction_WithParameterActionName_SetsResultActionName()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToAction("SampleAction");

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal("SampleAction", resultTemporary.ActionName);
        }

        [Fact]
        public void RedirectToActionPreserveMethod_WithParameterActionName_SetsResultActionName()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToActionPreserveMethod(actionName: "SampleAction");

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal("SampleAction", resultTemporary.ActionName);
        }

        [Fact]
        public void RedirectToActionPermanent_WithParameterActionName_SetsResultActionNameAndPermanent()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanent("SampleAction");

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal("SampleAction", resultPermanent.ActionName);
        }

        [Fact]
        public void RedirectToActionPermanentPreserveMethod_WithParameterActionName_SetsResultActionNameAndPermanent()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanentPreserveMethod(actionName: "SampleAction");

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal("SampleAction", resultPermanent.ActionName);
        }

        [Theory]
        [InlineData("")]
        [InlineData(null)]
        [InlineData("SampleController")]
        public void RedirectToAction_WithParameterActionAndControllerName_SetsEqualNames(string controllerName)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToAction("SampleAction", controllerName);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal("SampleAction", resultTemporary.ActionName);
            Assert.Equal(controllerName, resultTemporary.ControllerName);
        }

        [Theory]
        [InlineData("")]
        [InlineData(null)]
        [InlineData("SampleController")]
        public void RedirectToActionPreserveMethod_WithParameterActionAndControllerName_SetsEqualNames(string controllerName)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToActionPreserveMethod(actionName: "SampleAction", controllerName: controllerName);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal("SampleAction", resultTemporary.ActionName);
            Assert.Equal(controllerName, resultTemporary.ControllerName);
        }

        [Theory]
        [InlineData("")]
        [InlineData(null)]
        [InlineData("SampleController")]
        public void RedirectToActionPermanent_WithParameterActionAndControllerName_SetsEqualNames(string controllerName)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanent("SampleAction", controllerName);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal("SampleAction", resultPermanent.ActionName);
            Assert.Equal(controllerName, resultPermanent.ControllerName);
        }

        [Theory]
        [InlineData("")]
        [InlineData(null)]
        [InlineData("SampleController")]
        public void RedirectToActionPermanentPreserveMethod_WithParameterActionAndControllerName_SetsEqualNames(string controllerName)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanentPreserveMethod(actionName: "SampleAction", controllerName: controllerName);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal("SampleAction", resultPermanent.ActionName);
            Assert.Equal(controllerName, resultPermanent.ControllerName);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToAction_WithParameterActionControllerRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToAction("SampleAction", "SampleController", routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal("SampleAction", resultTemporary.ActionName);
            Assert.Equal("SampleController", resultTemporary.ControllerName);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPreserveMethod_WithParameterActionControllerRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToActionPreserveMethod(
                actionName: "SampleAction",
                controllerName: "SampleController",
                routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal("SampleAction", resultTemporary.ActionName);
            Assert.Equal("SampleController", resultTemporary.ControllerName);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPermanent_WithParameterActionControllerRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanent(
                "SampleAction",
                "SampleController",
                routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal("SampleAction", resultPermanent.ActionName);
            Assert.Equal("SampleController", resultPermanent.ControllerName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPermanentPreserveMethod_WithParameterActionControllerRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanentPreserveMethod(
                actionName: "SampleAction",
                controllerName: "SampleController",
                routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal("SampleAction", resultPermanent.ActionName);
            Assert.Equal("SampleController", resultPermanent.ControllerName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToAction_WithParameterActionAndRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToAction(actionName: null, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Null(resultTemporary.ActionName);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPreserveMethod_WithParameterActionAndRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToActionPreserveMethod(actionName: null, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Null(resultTemporary.ActionName);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToAction_WithParameterActionAndControllerAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedAction = "Action";
            var expectedController = "Home";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToAction("Action", "Home", routeValues, "test");

            // Assert
            Assert.IsType<RedirectToActionResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Equal(expectedAction, result.ActionName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedController, result.ControllerName);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPreserveMethod_WithParameterActionAndControllerAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedAction = "Action";
            var expectedController = "Home";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToActionPreserveMethod("Action", "Home", routeValues, "test");

            // Assert
            Assert.IsType<RedirectToActionResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Equal(expectedAction, result.ActionName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedController, result.ControllerName);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPermanent_WithParameterActionAndRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanent(null, routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Null(resultPermanent.ActionName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPermanentPreserveMethod_WithParameterActionAndRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToActionPermanentPreserveMethod(actionName: null, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToActionResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Null(resultPermanent.ActionName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPermanent_WithParameterActionAndControllerAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedAction = "Action";
            var expectedController = "Home";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToActionPermanent("Action", "Home", routeValues, fragment: "test");

            // Assert
            Assert.IsType<RedirectToActionResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Equal(expectedAction, result.ActionName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedController, result.ControllerName);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToActionPermanentPreserveMethod_WithParameterActionAndControllerAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedAction = "Action";
            var expectedController = "Home";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToActionPermanentPreserveMethod(
                actionName: "Action",
                controllerName: "Home",
                routeValues: routeValues,
                fragment: "test");

            // Assert
            Assert.IsType<RedirectToActionResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Equal(expectedAction, result.ActionName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedController, result.ControllerName);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoute_WithParameterRouteValues_SetsResultEqualRouteValues(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToRoute(routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePreserveMethod_WithParameterRouteValues_SetsResultEqualRouteValues(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultTemporary = pageModel.RedirectToRoutePreserveMethod(routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoute_WithParameterRouteNameAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedRoute = "TestRoute";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToRoute("TestRoute", routeValues, "test");

            // Assert
            Assert.IsType<RedirectToRouteResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Equal(expectedRoute, result.RouteName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePreserveMethod_WithParameterRouteNameAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedRoute = "TestRoute";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToRoutePreserveMethod(routeName: "TestRoute", routeValues: routeValues, fragment: "test");

            // Assert
            Assert.IsType<RedirectToRouteResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Equal(expectedRoute, result.RouteName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePermanent_WithParameterRouteValues_SetsResultEqualRouteValuesAndPermanent(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToRoutePermanent(routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePermanentPreserveMethod_WithParameterRouteValues_SetsResultEqualRouteValuesAndPermanent(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var resultPermanent = pageModel.RedirectToRoutePermanentPreserveMethod(routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePermanent_WithParameterRouteNameAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedRoute = "TestRoute";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToRoutePermanent("TestRoute", routeValues, "test");

            // Assert
            Assert.IsType<RedirectToRouteResult>(result);
            Assert.False(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Equal(expectedRoute, result.RouteName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePermanentPreserveMethod_WithParameterRouteNameAndRouteValuesAndFragment_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expectedRouteValues)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var expectedRoute = "TestRoute";
            var expectedFragment = "test";

            // Act
            var result = pageModel.RedirectToRoutePermanentPreserveMethod(routeName: "TestRoute", routeValues: routeValues, fragment: "test");

            // Assert
            Assert.IsType<RedirectToRouteResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.True(result.Permanent);
            Assert.Equal(expectedRoute, result.RouteName);
            Assert.Equal(expectedRouteValues, result.RouteValues);
            Assert.Equal(expectedFragment, result.Fragment);
        }

        [Fact]
        public void RedirectToRoute_WithParameterRouteName_SetsResultSameRouteName()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultTemporary = pageModel.RedirectToRoute(routeName);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Same(routeName, resultTemporary.RouteName);
        }

        [Fact]
        public void RedirectToRoutePreserveMethod_WithParameterRouteName_SetsResultSameRouteName()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act;
            var resultTemporary = pageModel.RedirectToRoutePreserveMethod(routeName: routeName);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Same(routeName, resultTemporary.RouteName);
        }

        [Fact]
        public void RedirectToRoutePermanent_WithParameterRouteName_SetsResultSameRouteNameAndPermanent()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultPermanent = pageModel.RedirectToRoutePermanent(routeName);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Same(routeName, resultPermanent.RouteName);
        }

        [Fact]
        public void RedirectToRoutePermanentPreserveMethod_WithParameterRouteName_SetsResultSameRouteNameAndPermanent()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultPermanent = pageModel.RedirectToRoutePermanentPreserveMethod(routeName: routeName);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Same(routeName, resultPermanent.RouteName);
        }

        public static IEnumerable<object[]> RedirectTestData
        {
            get
            {
                yield return new object[]
                {
                    null,
                    null,
                };

                yield return new object[]
                {
                    new Dictionary<string, object> { { "hello", "world" } },
                    new RouteValueDictionary() { { "hello", "world" } },
                };

                var expected2 = new Dictionary<string, object>
                {
                    { "test", "case" },
                    { "sample", "route" },
                };

                yield return new object[]
                {
                    new RouteValueDictionary(expected2),
                    new RouteValueDictionary(expected2),
                };
            }
        }

        [Fact]
        public void RedirectToPage_WithNoArguments()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var result = pageModel.RedirectToPage();

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Null(result.PageName);
        }

        [Fact]
        public void RedirectToPage_WithPageName()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page";

            // Act
            var result = pageModel.RedirectToPage(pageName);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
        }

        [Fact]
        public void RedirectToPage_WithRouteValues()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeValues = new { key = "value" };

            // Act
            var result = pageModel.RedirectToPage(routeValues);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Null(result.PageName);
            Assert.Collection(
                result.RouteValues,
                item =>
                {
                    Assert.Equal("key", item.Key);
                    Assert.Equal("value", item.Value);
                });
        }

        [Fact]
        public void RedirectToPage_WithPageNameAndHandler()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";

            // Act
            var result = pageModel.RedirectToPage(pageName, pageHandler);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
        }

        [Fact]
        public void RedirectToPage_WithPageNameAndRouteValues()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var routeVaues = new { key = "value" };

            // Act
            var result = pageModel.RedirectToPage(pageName, routeVaues);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Collection(
                result.RouteValues,
                item =>
                {
                    Assert.Equal("key", item.Key);
                    Assert.Equal("value", item.Value);
                });
        }

        [Fact]
        public void RedirectToPage_WithPageNameHandlerAndFragment()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";
            var fragment = "fragment";

            // Act
            var result = pageModel.RedirectToPage(pageName, pageHandler, fragment);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
            Assert.Equal(fragment, result.Fragment);
        }

        [Fact]
        public void RedirectToPage_WithPageNameRouteValuesHandlerAndFragment()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";
            var fragment = "fragment";
            var routeValues = new { key = "value" };

            // Act
            var result = pageModel.RedirectToPage(pageName, pageHandler, routeValues, fragment);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
            Assert.Collection(
                result.RouteValues,
                item =>
                {
                    Assert.Equal("key", item.Key);
                    Assert.Equal("value", item.Value);
                });
            Assert.Equal(fragment, result.Fragment);
        }

        [Fact]
        public void RedirectToPagePermanent_WithPageName()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";

            // Act
            var result = pageModel.RedirectToPagePermanent(pageName);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.True(result.Permanent);
        }

        [Fact]
        public void RedirectToPagePermanent_WithPageNameAndPageHandler()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";

            // Act
            var result = pageModel.RedirectToPagePermanent(pageName, pageHandler);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
            Assert.True(result.Permanent);
        }

        [Fact]
        public void RedirectToPagePermanent_WithPageNameAndRouteValues()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var routeValues = new { key = "value" };

            // Act
            var result = pageModel.RedirectToPagePermanent(pageName, routeValues);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Collection(
                result.RouteValues,
                item =>
                {
                    Assert.Equal("key", item.Key);
                    Assert.Equal("value", item.Value);
                });
            Assert.True(result.Permanent);
        }

        [Fact]
        public void RedirectToPagePermanent_WithPageNamePageHandlerAndRouteValues()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";
            var routeValues = new { key = "value" };

            // Act
            var result = pageModel.RedirectToPagePermanent(pageName, pageHandler, routeValues);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
            Assert.Collection(
                result.RouteValues,
                item =>
                {
                    Assert.Equal("key", item.Key);
                    Assert.Equal("value", item.Value);
                });
            Assert.True(result.Permanent);
        }

        [Fact]
        public void RedirectToPagePermanent_WithPageNamePageHandlerAndFragment()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";
            var fragment = "fragment";

            // Act
            var result = pageModel.RedirectToPagePermanent(pageName, pageHandler, fragment);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
            Assert.Equal(fragment, result.Fragment);
            Assert.True(result.Permanent);
        }

        [Fact]
        public void RedirectToPagePermanent_WithPageNamePageHandlerRouteValuesAndFragment()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "/Page-Name";
            var pageHandler = "page-handler";
            var routeValues = new { key = "value" };
            var fragment = "fragment";

            // Act
            var result = pageModel.RedirectToPagePermanent(pageName, pageHandler, routeValues, fragment);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.Equal(pageName, result.PageName);
            Assert.Equal(pageHandler, result.PageHandler);
            Assert.Collection(
                result.RouteValues,
                item =>
                {
                    Assert.Equal("key", item.Key);
                    Assert.Equal("value", item.Value);
                });
            Assert.Equal(fragment, result.Fragment);
            Assert.True(result.Permanent);
        }

        [Fact]
        public void RedirectToPagePreserveMethod_WithParameterUrl_SetsRedirectResultPreserveMethod()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var url = "/test/url";

            // Act
            var result = pageModel.RedirectToPagePreserveMethod(url);

            // Assert
            Assert.IsType<RedirectToPageResult>(result);
            Assert.True(result.PreserveMethod);
            Assert.False(result.Permanent);
            Assert.Same(url, result.PageName);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToPagePreserveMethod_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var pageName = "CustomRouteName";

            // Act
            var resultPermanent = pageModel.RedirectToPagePreserveMethod(pageName, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToPageResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.False(resultPermanent.Permanent);
            Assert.Same(pageName, resultPermanent.PageName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToPagePermanentPreserveMethod_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultPermanent = pageModel.RedirectToPagePermanentPreserveMethod(routeName, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToPageResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Same(routeName, resultPermanent.PageName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoute_WithParameterRouteNameAndRouteValues_SetsResultSameRouteNameAndRouteValues(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultTemporary = pageModel.RedirectToRoute(routeName, routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultTemporary);
            Assert.False(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Same(routeName, resultTemporary.RouteName);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePreserveMethod_WithParameterRouteNameAndRouteValues_SetsResultSameRouteNameAndRouteValues(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultTemporary = pageModel.RedirectToRoutePreserveMethod(routeName: routeName, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultTemporary);
            Assert.True(resultTemporary.PreserveMethod);
            Assert.False(resultTemporary.Permanent);
            Assert.Same(routeName, resultTemporary.RouteName);
            Assert.Equal(expected, resultTemporary.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePermanent_WithParameterRouteNameAndRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultPermanent = pageModel.RedirectToRoutePermanent(routeName, routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultPermanent);
            Assert.False(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Same(routeName, resultPermanent.RouteName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Theory]
        [MemberData(nameof(RedirectTestData))]
        public void RedirectToRoutePermanentPreserveMethod_WithParameterRouteNameAndRouteValues_SetsResultProperties(
            object routeValues,
            IEnumerable<KeyValuePair<string, object>> expected)
        {
            // Arrange
            var pageModel = new TestPageModel();
            var routeName = "CustomRouteName";

            // Act
            var resultPermanent = pageModel.RedirectToRoutePermanentPreserveMethod(routeName: routeName, routeValues: routeValues);

            // Assert
            Assert.IsType<RedirectToRouteResult>(resultPermanent);
            Assert.True(resultPermanent.PreserveMethod);
            Assert.True(resultPermanent.Permanent);
            Assert.Same(routeName, resultPermanent.RouteName);
            Assert.Equal(expected, resultPermanent.RouteValues);
        }

        [Fact]
        public void File_WithContents()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var fileContents = new byte[0];

            // Act
            var result = pageModel.File(fileContents, "application/pdf");

            // Assert
            Assert.NotNull(result);
            Assert.Same(fileContents, result.FileContents);
            Assert.Equal("application/pdf", result.ContentType.ToString());
            Assert.Equal(string.Empty, result.FileDownloadName);
        }

        [Fact]
        public void File_WithContentsAndFileDownloadName()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var fileContents = new byte[0];

            // Act
            var result = pageModel.File(fileContents, "application/pdf", "someDownloadName");

            // Assert
            Assert.NotNull(result);
            Assert.Same(fileContents, result.FileContents);
            Assert.Equal("application/pdf", result.ContentType.ToString());
            Assert.Equal("someDownloadName", result.FileDownloadName);
        }

        [Fact]
        public void File_WithPath()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var path = Path.GetFullPath("somepath");

            // Act
            var result = pageModel.File(path, "application/pdf");

            // Assert
            Assert.NotNull(result);
            Assert.Equal(path, result.FileName);
            Assert.Equal("application/pdf", result.ContentType.ToString());
            Assert.Equal(string.Empty, result.FileDownloadName);
        }

        [Fact]
        public void File_WithPathAndFileDownloadName()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var path = Path.GetFullPath("somepath");

            // Act
            var result = pageModel.File(path, "application/pdf", "someDownloadName");

            // Assert
            Assert.NotNull(result);
            Assert.Equal(path, result.FileName);
            Assert.Equal("application/pdf", result.ContentType.ToString());
            Assert.Equal("someDownloadName", result.FileDownloadName);
        }

        [Fact]
        public void File_WithStream()
        {
            // Arrange
            var mockHttpContext = new Mock<HttpContext>();
            mockHttpContext.Setup(x => x.Response.RegisterForDispose(It.IsAny<IDisposable>()));

            var pageModel = new TestPageModel()
            {
                PageContext = new PageContext
                {
                    HttpContext = mockHttpContext.Object
                }
            };

            var fileStream = Stream.Null;

            // Act
            var result = pageModel.File(fileStream, "application/pdf");

            // Assert
            Assert.NotNull(result);
            Assert.Same(fileStream, result.FileStream);
            Assert.Equal("application/pdf", result.ContentType.ToString());
            Assert.Equal(string.Empty, result.FileDownloadName);
        }

        [Fact]
        public void File_WithStreamAndFileDownloadName()
        {
            // Arrange
            var mockHttpContext = new Mock<HttpContext>();

            var pageModel = new TestPageModel()
            {
                PageContext = new PageContext
                {
                    HttpContext = mockHttpContext.Object
                }
            };

            var fileStream = Stream.Null;

            // Act
            var result = pageModel.File(fileStream, "application/pdf", "someDownloadName");

            // Assert
            Assert.NotNull(result);
            Assert.Same(fileStream, result.FileStream);
            Assert.Equal("application/pdf", result.ContentType.ToString());
            Assert.Equal("someDownloadName", result.FileDownloadName);
        }

        [Fact]
        public void Unauthorized_SetsStatusCode()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var result = pageModel.Unauthorized();

            // Assert
            Assert.IsType<UnauthorizedResult>(result);
            Assert.Equal(StatusCodes.Status401Unauthorized, result.StatusCode);
        }

        [Fact]
        public void BadRequest_SetsStatusCode()
        {
            // Arrange
            var page = new TestPage();

            // Act
            var result = page.BadRequest();

            // Assert
            Assert.IsType<BadRequestResult>(result);
            Assert.Equal(StatusCodes.Status400BadRequest, result.StatusCode);
        }

        [Fact]
        public void BadRequest_SetsStatusCodeAndResponseContent()
        {
            // Arrange
            var page = new TestPage();

            // Act
            var result = page.BadRequest("Test Content");

            // Assert
            Assert.IsType<BadRequestObjectResult>(result);
            Assert.Equal(StatusCodes.Status400BadRequest, result.StatusCode);
            Assert.Equal("Test Content", result.Value);
        }

        [Fact]
        public void NotFound_SetsStatusCode()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var result = pageModel.NotFound();

            // Assert
            Assert.IsType<NotFoundResult>(result);
            Assert.Equal(StatusCodes.Status404NotFound, result.StatusCode);
        }

        [Fact]
        public void NotFound_SetsStatusCodeAndResponseContent()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var result = pageModel.NotFound("Test Content");

            // Assert
            Assert.IsType<NotFoundObjectResult>(result);
            Assert.Equal(StatusCodes.Status404NotFound, result.StatusCode);
            Assert.Equal("Test Content", result.Value);
        }

        [Fact]
        public void Content_WithParameterContentString_SetsResultContent()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var actualContentResult = pageModel.Content("TestContent");

            // Assert
            Assert.IsType<ContentResult>(actualContentResult);
            Assert.Equal("TestContent", actualContentResult.Content);
            Assert.Null(actualContentResult.ContentType);
        }

        [Fact]
        public void Content_WithParameterContentStringAndContentType_SetsResultContentAndContentType()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var actualContentResult = pageModel.Content("TestContent", "text/plain");

            // Assert
            Assert.IsType<ContentResult>(actualContentResult);
            Assert.Equal("TestContent", actualContentResult.Content);
            Assert.Null(MediaType.GetEncoding(actualContentResult.ContentType));
            Assert.Equal("text/plain", actualContentResult.ContentType.ToString());
        }

        [Fact]
        public void Content_WithParameterContentAndTypeAndEncoding_SetsResultContentAndTypeAndEncoding()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var actualContentResult = pageModel.Content("TestContent", "text/plain", Encoding.UTF8);

            // Assert
            Assert.IsType<ContentResult>(actualContentResult);
            Assert.Equal("TestContent", actualContentResult.Content);
            Assert.Same(Encoding.UTF8, MediaType.GetEncoding(actualContentResult.ContentType));
            Assert.Equal("text/plain; charset=utf-8", actualContentResult.ContentType.ToString());
        }

        [Fact]
        public void Content_NoContentType_DefaultEncodingIsUsed()
        {
            // Arrange
            var contentPageModel = new ContentPageModel();

            // Act
            var contentResult = (ContentResult)contentPageModel.Content_WithNoEncoding();

            // Assert
            // The default content type of ContentResult is used when the result is executed.
            Assert.Null(contentResult.ContentType);
        }

        [Fact]
        public void Content_InvalidCharset_DefaultEncodingIsUsed()
        {
            // Arrange
            var contentPageModel = new ContentPageModel();
            var contentType = "text/xml; charset=invalid; p1=p1-value";

            // Act
            var contentResult = (ContentResult)contentPageModel.Content_WithInvalidCharset();

            // Assert
            Assert.NotNull(contentResult.ContentType);
            Assert.Equal(contentType, contentResult.ContentType.ToString());
            // The default encoding of ContentResult is used when this result is executed.
            Assert.Null(MediaType.GetEncoding(contentResult.ContentType));
        }

        [Fact]
        public void Content_CharsetAndEncodingProvided_EncodingIsUsed()
        {
            // Arrange
            var contentPageModel = new ContentPageModel();
            var contentType = "text/xml; charset=us-ascii; p1=p1-value";

            // Act
            var contentResult = (ContentResult)contentPageModel.Content_WithEncodingInCharset_AndEncodingParameter();

            // Assert
            MediaTypeAssert.Equal(contentType, contentResult.ContentType);
        }

        [Fact]
        public void Content_CharsetInContentType_IsUsedForEncoding()
        {
            // Arrange
            var contentPageModel = new ContentPageModel();
            var contentType = "text/xml; charset=us-ascii; p1=p1-value";

            // Act
            var contentResult = (ContentResult)contentPageModel.Content_WithEncodingInCharset();

            // Assert
            Assert.Equal(contentType, contentResult.ContentType);
        }

        [Fact]
        public void StatusCode_SetObject()
        {
            // Arrange
            var statusCode = 204;
            var value = new { Value = 42 };

            var statusCodeController = new StatusCodePageModel();

            // Act
            var result = (ObjectResult)statusCodeController.StatusCode_Object(statusCode, value);

            // Assert
            Assert.Equal(statusCode, result.StatusCode);
            Assert.Equal(value, result.Value);
        }

        [Fact]
        public void StatusCode_SetObjectNull()
        {
            // Arrange
            var statusCode = 204;
            object value = null;

            var statusCodeController = new StatusCodePageModel();

            // Act
            var result = statusCodeController.StatusCode_Object(statusCode, value);

            // Assert
            Assert.Equal(statusCode, result.StatusCode);
            Assert.Equal(value, result.Value);
        }

        [Fact]
        public void StatusCode_SetsStatusCode()
        {
            // Arrange
            var statusCode = 205;
            var statusCodeModel = new StatusCodePageModel();

            // Act
            var result = statusCodeModel.StatusCode_Int(statusCode);

            // Assert
            Assert.Equal(statusCode, result.StatusCode);
        }

        [Fact]
        public void PageModelPropertiesArePopulatedFromContext()
        {
            // Arrange
            var httpContext = new DefaultHttpContext();
            var modelState = new ModelStateDictionary();
            var actionContext = new ActionContext(httpContext, new RouteData(), new PageActionDescriptor(), modelState);
            var modelMetadataProvider = new EmptyModelMetadataProvider();
            var viewData = new ViewDataDictionary(modelMetadataProvider, modelState);
            var pageContext = new PageContext(actionContext)
            {
                ViewData = viewData,
            };

            var page = new TestPage
            {
                PageContext = pageContext,
            };

            var pageModel = new TestPageModel
            {
                PageContext = pageContext,
            };

            // Act & Assert
            Assert.Same(pageContext, pageModel.PageContext);
            Assert.Same(httpContext, pageModel.HttpContext);
            Assert.Same(httpContext.Request, pageModel.Request);
            Assert.Same(httpContext.Response, pageModel.Response);
            Assert.Same(modelState, pageModel.ModelState);
            Assert.Same(viewData, pageModel.ViewData);
        }

        [Fact]
        public void UrlHelperIsSet()
        {
            // Arrange
            var httpContext = new DefaultHttpContext();
            var urlHelper = Mock.Of<IUrlHelper>();
            var urlHelperFactory = new Mock<IUrlHelperFactory>();
            urlHelperFactory.Setup(f => f.GetUrlHelper(It.IsAny<ActionContext>()))
                .Returns(urlHelper);
            httpContext.RequestServices = new ServiceCollection()
                .AddSingleton(urlHelperFactory.Object)
                .BuildServiceProvider();
            var actionContext = new ActionContext
            {
                HttpContext = httpContext,
            };
            var pageContext = new PageContext
            {
                HttpContext = httpContext,
            };

            var pageModel = new TestPageModel
            {
                PageContext = pageContext,
            };

            // Act & Assert
            Assert.Same(urlHelper, pageModel.Url);
        }

        [Fact]
        public void Redirect_ReturnsARedirectResult()
        {
            // Arrange
            var pageModel = new TestPageModel();

            // Act
            var result = pageModel.Redirect("test-url");

            // Assert
            var redirectResult = Assert.IsType<RedirectResult>(result);
            Assert.Equal("test-url", redirectResult.Url);
        }

        [Fact]
        public void View_ReturnsPageViewResult()
        {
            // Arrange
            var page = new TestPage();
            var pageModel = new TestPageModel
            {
                PageContext = new PageContext()
            };

            // Act
            var result = pageModel.Page();

            // Assert
            var pageResult = Assert.IsType<PageResult>(result);
            Assert.Null(pageResult.Page); // This is set by the invoker
        }

        [Fact]
        public async Task AsyncPageHandlerExecutingMethod_InvokeSyncMethods()
        {
            // Arrange
            var pageContext = new PageContext(new ActionContext(
                new DefaultHttpContext(),
                new RouteData(),
                new PageActionDescriptor(),
                new ModelStateDictionary()));
            var pageHandlerExecutingContext = new PageHandlerExecutingContext(
                pageContext,
                Array.Empty<IFilterMetadata>(),
                new HandlerMethodDescriptor(),
                new Dictionary<string, object>(),
                new object());
            var pageHandlerExecutedContext = new PageHandlerExecutedContext(
                pageContext,
                Array.Empty<IFilterMetadata>(),
                new HandlerMethodDescriptor(),
                new object());
            var testPageModel = new Mock<PageModel> { CallBase = true };
            testPageModel.Setup(p => p.OnPageHandlerExecuting(pageHandlerExecutingContext))
                .Verifiable();
            testPageModel.Setup(p => p.OnPageHandlerExecuted(pageHandlerExecutedContext))
                .Verifiable();

            // Act
            await testPageModel.Object.OnPageHandlerExecutionAsync(
                pageHandlerExecutingContext,
                () => Task.FromResult(pageHandlerExecutedContext));

            testPageModel.Verify();
        }

        [Fact]
        public async Task AsyncPageHandlerExecutingMethod__DoesNotInvokeExecutedMethod_IfResultIsSet()
        {
            // Arrange
            var pageContext = new PageContext(new ActionContext(
                new DefaultHttpContext(),
                new RouteData(),
                new PageActionDescriptor(),
                new ModelStateDictionary()));
            var pageHandlerExecutingContext = new PageHandlerExecutingContext(
                pageContext,
                Array.Empty<IFilterMetadata>(),
                new HandlerMethodDescriptor(),
                new Dictionary<string, object>(),
                new object());
            var pageHandlerExecutedContext = new PageHandlerExecutedContext(
                pageContext,
                Array.Empty<IFilterMetadata>(),
                new HandlerMethodDescriptor(),
                new object());
            var testPageModel = new Mock<PageModel>() { CallBase = true };
            testPageModel.Setup(p => p.OnPageHandlerExecuting(pageHandlerExecutingContext))
                .Callback((PageHandlerExecutingContext context) => context.Result = new PageResult())
                .Verifiable();
            testPageModel.Setup(p => p.OnPageHandlerExecuted(pageHandlerExecutedContext))
                .Throws(new Exception("Shouldn't be called"));

            // Act
            await testPageModel.Object.OnPageHandlerExecutionAsync(
                pageHandlerExecutingContext,
                () => Task.FromResult(pageHandlerExecutedContext));

            testPageModel.Verify();
        }

        [Fact]
        public async Task AsyncPageHandlerSelectingMethod_InvokeSyncMethods()
        {
            // Arrange
            var pageContext = new PageContext(new ActionContext(
                new DefaultHttpContext(),
                new RouteData(),
                new PageActionDescriptor(),
                new ModelStateDictionary()));
            var pageHandlerSelectedContext = new PageHandlerSelectedContext(
                pageContext,
                Array.Empty<IFilterMetadata>(),
                new object());

            var testPageModel = new Mock<PageModel> { CallBase = true };
            testPageModel.Setup(p => p.OnPageHandlerSelected(pageHandlerSelectedContext))
                .Verifiable();

            // Act
            await testPageModel.Object.OnPageHandlerSelectionAsync(pageHandlerSelectedContext);

            testPageModel.Verify();
        }

        [Fact]
        public void ViewComponent_WithName()
        {
            // Arrange
            var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary());
            var pageModel = new TestPageModel
            {
                PageContext = new PageContext
                {
                    ViewData = viewData,
                },
            };

            // Act
            var result = pageModel.ViewComponent("TagCloud");

            // Assert
            Assert.NotNull(result);
            Assert.Equal("TagCloud", result.ViewComponentName);
            Assert.Same(viewData, result.ViewData);
        }

        [Fact]
        public void ViewComponent_WithType()
        {
            // Arrange
            var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary());
            var pageModel = new TestPageModel
            {
                PageContext = new PageContext
                {
                    ViewData = viewData,
                },
            };

            // Act
            var result = pageModel.ViewComponent(typeof(Guid));

            // Assert
            Assert.NotNull(result);
            Assert.Equal(typeof(Guid), result.ViewComponentType);
            Assert.Same(viewData, result.ViewData);
        }

        [Fact]
        public void ViewComponent_WithArguments()
        {
            // Arrange
            var pageModel = new TestPageModel();
            var arguments = new { Arg1 = "Hi", Arg2 = "There" };

            // Act
            var result = pageModel.ViewComponent(typeof(Guid), arguments);

            // Assert
            Assert.NotNull(result);

            Assert.Equal(typeof(Guid), result.ViewComponentType);
            Assert.Same(arguments, result.Arguments);
        }

        private class ContentPageModel : PageModel
        {
            public IActionResult Content_WithNoEncoding()
            {
                return Content("Hello!!");
            }

            public IActionResult Content_WithEncodingInCharset()
            {
                return Content("Hello!!", "text/xml; charset=us-ascii; p1=p1-value");
            }

            public IActionResult Content_WithInvalidCharset()
            {
                return Content("Hello!!", "text/xml; charset=invalid; p1=p1-value");
            }

            public IActionResult Content_WithEncodingInCharset_AndEncodingParameter()
            {
                return Content("Hello!!", "text/xml; charset=invalid; p1=p1-value", Encoding.ASCII);
            }
        }

        private class StatusCodePageModel : PageModel
        {
            public StatusCodeResult StatusCode_Int(int statusCode)
            {
                return StatusCode(statusCode);
            }

            public ObjectResult StatusCode_Object(int statusCode, object value)
            {
                return StatusCode(statusCode, value);
            }
        }

        private class TestPageModel : PageModel
        {
        }

        private class TestPage : Page
        {
            public override Task ExecuteAsync()
            {
                throw new NotImplementedException();
            }
        }
    }
}