Add simplified assertions for PageResult and RedirectToPageResult

src/FluentAssertions.AspNetCore.Mvc/ActionResultAssertions.cs

@@ -1,6 +1,7 @@
 using FluentAssertions.Execution;
 using FluentAssertions.Primitives;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
 using System.Diagnostics;
 
 namespace FluentAssertions.AspNetCore.Mvc
@@ -284,6 +285,27 @@ public ViewResultAssertions BeViewResult(string reason = "", params object[] rea
             return new ViewResultAssertions(Subject as ViewResult);
         }
 
+        /// <summary>
+        /// Asserts that the subject is a <see cref="PageResult"/>.
+        /// </summary>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        [CustomAssertion]
+        public PageResultAssertions BePageResult(string reason = "", params object[] reasonArgs)
+        {
+            Execute.Assertion
+                .BecauseOf(reason, reasonArgs)
+                .ForCondition(Subject is PageResult)
+                .FailWith(FailureMessages.CommonTypeFailMessage, typeof(PageResult), Subject.GetType());
+
+            return new PageResultAssertions(Subject as PageResult);
+        }
+
         /// <summary>
         /// Asserts that the subject is a <see cref="RedirectToActionResult"/>.
         /// </summary>
@@ -305,6 +327,27 @@ public RedirectToActionResultAssertions BeRedirectToActionResult(string reason =
             return new RedirectToActionResultAssertions(Subject as RedirectToActionResult);
         }
 
+        /// <summary>
+        /// Asserts that the subject is a <see cref="RedirectToPageResult"/>.
+        /// </summary>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        [CustomAssertion]
+        public RedirectToPageResultAssertions BeRedirectToPageResult(string reason = "", params object[] reasonArgs)
+        {
+            Execute.Assertion
+                .BecauseOf(reason, reasonArgs)
+                .ForCondition(Subject is RedirectToPageResult)
+                .FailWith(FailureMessages.CommonTypeFailMessage, typeof(RedirectToPageResult), Subject.GetType());
+
+            return new RedirectToPageResultAssertions(Subject as RedirectToPageResult);
+        }
+
         /// <summary>
         /// Asserts that the subject is a <see cref="StatusCodeResult"/>.
         /// </summary>

src/FluentAssertions.AspNetCore.Mvc/PageResultAssertions.cs

@@ -0,0 +1,25 @@
+using FluentAssertions.Primitives;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using System.Diagnostics;
+
+namespace FluentAssertions.AspNetCore.Mvc
+{
+    /// <summary>
+    ///     Contains a number of methods to assert that a <see cref="PageResult" /> is in the expected state.
+    /// </summary>
+    [DebuggerNonUserCode]
+    public class PageResultAssertions : ObjectAssertions
+    {
+        #region Public Constructors
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PageResultAssertions" /> class.
+        /// </summary>
+        /// <param name="subject">The object to test assertion on</param>
+        public PageResultAssertions(PageResult subject) : base(subject)
+        {
+        }
+
+        #endregion Public Constructors
+    }
+}

src/FluentAssertions.AspNetCore.Mvc/RedirectToPageResultAssertions.cs

@@ -0,0 +1,139 @@
+using FluentAssertions.Execution;
+using FluentAssertions.Primitives;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Diagnostics;
+
+namespace FluentAssertions.AspNetCore.Mvc
+{
+    /// <summary>
+    /// Contains a number of methods to assert that a <see cref="RedirectToPageResult"/> is in the expected state.
+    /// </summary>
+    [DebuggerNonUserCode]
+    public class RedirectToPageResultAssertions : ObjectAssertions
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RedirectToPageResultAssertions" /> class.
+        /// </summary>
+        public RedirectToPageResultAssertions(RedirectToPageResult subject) : base(subject) { }
+
+        private RedirectToPageResult RedirectToPageResultSubject => Subject as RedirectToPageResult;
+
+        /// <summary>
+        /// Asserts that the page name is the expected page.
+        /// </summary>
+        /// <param name="expectedPageName">The expected page.</param>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion 
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        public RedirectToPageResultAssertions WithPageName(string expectedPageName, string reason = "", params object[] reasonArgs)
+        {
+            string actualPageName = RedirectToPageResultSubject.PageName;
+
+            Execute.Assertion
+                   .ForCondition(string.Equals(actualPageName, expectedPageName, StringComparison.OrdinalIgnoreCase))
+                   .BecauseOf(reason, reasonArgs)
+                   .WithDefaultIdentifier("RedirectToPageResult.PageName")
+                   .FailWith(FailureMessages.CommonFailMessage, expectedPageName, actualPageName);
+
+            return this;
+        }
+
+        /// <summary>
+        /// Asserts that the fragment is the expected fragment.
+        /// </summary>
+        /// <param name="expectedFragment">The expected fragment.</param>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion 
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        public RedirectToPageResultAssertions WithFragment(string expectedFragment, string reason = "", params object[] reasonArgs)
+        {
+            string actualFragment = RedirectToPageResultSubject.Fragment;
+
+            Execute.Assertion
+                .ForCondition(string.Equals(actualFragment, expectedFragment, StringComparison.OrdinalIgnoreCase))
+                .BecauseOf(reason, reasonArgs)
+                .WithDefaultIdentifier("RedirectToPageResult.Fragment")
+                .FailWith(FailureMessages.CommonFailMessage, expectedFragment, actualFragment);
+
+            return this;
+        }
+
+        /// <summary>
+        /// Asserts that the redirect to page is permanent.
+        /// </summary>
+        /// <param name="expectedPermanent">Should the expected redirect be permanent.</param>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion 
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        public RedirectToPageResultAssertions WithPermanent(bool expectedPermanent, string reason = "", params object[] reasonArgs)
+        {
+            bool actualPermanent = RedirectToPageResultSubject.Permanent;
+
+            Execute.Assertion
+                    .ForCondition(expectedPermanent == actualPermanent)
+                    .BecauseOf(reason, reasonArgs)
+                    .WithDefaultIdentifier("RedirectToPageResult.Permanent")
+                    .FailWith(FailureMessages.CommonFailMessage, expectedPermanent, actualPermanent);
+
+            return this;
+        }
+
+        /// <summary>
+        /// Asserts that the redirect preserves the original request method.
+        /// </summary>
+        /// <param name="expectedPreserveMethod">Should the expected redirect preserve the original request method.</param>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion 
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        public RedirectToPageResultAssertions WithPreserveMethod(bool expectedPreserveMethod, string reason = "", params object[] reasonArgs)
+        {
+            bool actualPreserveMethod = RedirectToPageResultSubject.PreserveMethod;
+
+            Execute.Assertion
+                .ForCondition(expectedPreserveMethod == actualPreserveMethod)
+                .BecauseOf(reason, reasonArgs)
+                .WithDefaultIdentifier("RedirectToPageResult.PreserveMethod")
+                .FailWith(FailureMessages.CommonFailMessage, expectedPreserveMethod, actualPreserveMethod);
+
+            return this;
+        }
+
+        /// <summary>
+        /// Asserts that the redirect has the expected route value.
+        /// </summary>
+        /// <param name="key">The expected key.</param>
+        /// <param name="expectedValue">The expected value.</param>
+        /// <param name="reason">
+        /// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion 
+        /// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
+        /// </param>
+        /// <param name="reasonArgs">
+        /// Zero or more objects to format using the placeholders in <paramref name="reason"/>.
+        /// </param>
+        public RedirectToPageResultAssertions WithRouteValue(string key, object expectedValue, string reason = "", params object[] reasonArgs)
+        {
+            var subjectTyped = RedirectToPageResultSubject;
+
+            AssertionHelpers.AssertStringObjectDictionary(subjectTyped.RouteValues, "RedirectToPageResult.RouteValues", key, expectedValue, reason, reasonArgs);
+
+            return this;
+        }
+    }
+}

tests/FluentAssertions.AspNetCore.Mvc.Tests/ActionResultAssertions_Tests.cs

@@ -1,6 +1,7 @@
 using FluentAssertions.AspNetCore.Mvc.Tests.Helpers;
 using FluentAssertions.Mvc.Tests.Helpers;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
 using Microsoft.AspNetCore.Routing;
 using System;
 using Xunit;
@@ -262,6 +263,26 @@ public void BeView_GivenNotView_ShouldFail()
                 .WithMessage(failureMessage);
         }
 
+        [Fact]
+        public void BePage_GivenPage_ShouldPass()
+        {
+            ActionResult result = new PageResult();
+
+            result.Should().BePageResult();
+        }
+
+        [Fact]
+        public void BePage_GivenNotPage_ShouldFail()
+        {
+            ActionResult result = new RedirectResult("/");
+            var failureMessage = FailureMessageHelper.ExpectedContextTypeXButFoundYWithReason("result", typeof(PageResult), typeof(RedirectResult));
+
+            Action a = () => result.Should().BePageResult(Reason, ReasonArgs);
+
+            a.Should().Throw<Exception>()
+                .WithMessage(failureMessage);
+        }
+
         [Fact]
         public void BeStatusCodeResult_GivenStatusCodeResult_ShouldPass()
         {