Initial booking questions implementation

src/ServiceAssessmentService/ServiceAssessmentService.WebApp.Test/BasicWebTests.cs

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+using FluentAssertions;
+using FluentAssertions.Execution;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Xunit;
+
+namespace ServiceAssessmentService.WebApp.Test;
+
+public class BasicWebTests : IClassFixture<WebApplicationFactory<Program>>
+{
+    private readonly WebApplicationFactory<Program> _factory;
+
+    public BasicWebTests(WebApplicationFactory<Program> factory)
+    {
+        _factory = factory;
+    }
+
+    public static IEnumerable<object[]> SimpleUrls =>
+        new List<object[]>
+        {
+            new object[] { "/" },
+            new object[] { "/AccessibilityStatement" },
+            new object[] { "/CookiePolicy" },
+            new object[] { "/Privacy" },
+            new object[] { "/Dashboard" },
+            new object[] { "/Book/BookingRequest/Index" },
+            // new object[] { "/Book/Request/AssessmentType/Index" },
+        };
+
+    [Theory]
+    [MemberData(nameof(SimpleUrls))]
+    public async Task StatusCodeMustIndicateSuccessResponse(string url)
+    {
+        // Arrange
+        var client = _factory.CreateClient();
+
+        // Act
+        var response = await client.GetAsync(url);
+
+        // Assert
+        using (new AssertionScope())
+        {
+            response.IsSuccessStatusCode.Should().BeTrue(); // Status Code 200-299
+
+            // Redundant additional checks, but provides extra information in case of failure.
+            int statusCode = (int)response.StatusCode;
+            statusCode.Should().BeGreaterThanOrEqualTo(200);
+            statusCode.Should().BeLessThanOrEqualTo(299);
+
+            response.StatusCode.Should().Be(System.Net.HttpStatusCode.OK);
+        }
+    }
+
+    [Theory]
+    [MemberData(nameof(SimpleUrls))]
+    public async Task ContentTypeMustBeTextHtmlUtf8(string url)
+    {
+        // Arrange
+        var client = _factory.CreateClient();
+
+        // Act
+        var response = await client.GetAsync(url);
+
+        // Assert
+        response.Content?.Headers?.ContentType?.ToString()
+            .Should().Be("text/html; charset=utf-8");
+    }
+}

src/ServiceAssessmentService/ServiceAssessmentService.WebApp.Test/Book/FakeNotImplementedBookingRequestReadService.cs

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+using ServiceAssessmentService.WebApp.Core;
+using ServiceAssessmentService.WebApp.Models;
+using System.Diagnostics.CodeAnalysis;
+using ServiceAssessmentService.WebApp.Services.Book;
+
+namespace ServiceAssessmentService.WebApp.Test.Book;
+
+/// <summary>
+/// Stub fake booking request read service.
+/// All implementations of interface methods throw NotImplementedException,
+/// and are virtual so that they may be overridden as required.
+/// </summary>
+[ExcludeFromCodeCoverage]
+public class FakeNotImplementedBookingRequestReadService : IBookingRequestReadService
+{
+    public Task<IEnumerable<IncompleteBookingRequest>> GetAllAssessments()
+    {
+        throw new NotImplementedException();
+    }
+
+    public virtual Task<IncompleteBookingRequest?> GetByIdAsync(BookingRequestId id)
+    {
+        throw new NotImplementedException();
+    }
+
+    public Task<List<DateOnly>> AvailableReviewDates(BookingRequestId id)
+    {
+        throw new NotImplementedException();
+    }
+
+    public virtual Task<IEnumerable<Phase>> GetPhases()
+    {
+        throw new NotImplementedException();
+    }
+}

src/ServiceAssessmentService/ServiceAssessmentService.WebApp.Test/Book/FakeNotImplementedBookingRequestWriteService.cs

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+using ServiceAssessmentService.WebApp.Core;
+using ServiceAssessmentService.WebApp.Models;
+using System.Diagnostics.CodeAnalysis;
+using ServiceAssessmentService.WebApp.Services.Book;
+
+namespace ServiceAssessmentService.WebApp.Test.Book;
+
+/// <summary>
+/// Stub fake booking request write service.
+/// All implementations of interface methods throw NotImplementedException,
+/// and are virtual so that they may be overridden as required.
+/// </summary>
+[ExcludeFromCodeCoverage]
+public class FakeNotImplementedBookingRequestWriteService : IBookingRequestWriteService
+{
+
+    public virtual Task<IncompleteBookingRequest> CreateRequestAsync(Phase phaseConcluding, AssessmentType assessmentType)
+    {
+        throw new NotImplementedException();
+    }
+
+    public virtual Task<ChangeRequestModel> UpdateRequestName(BookingRequestId id, string proposedName)
+    {
+        throw new NotImplementedException();
+    }
+
+    public virtual Task<ChangeRequestModel> UpdateDescription(BookingRequestId id, string proposedDescription)
+    {
+        throw new NotImplementedException();
+    }
+
+    public virtual Task<ChangeRequestModel> UpdateProjectCode(BookingRequestId id, bool? isProjectCodeKnown,
+        string proposedProjectCode)
+    {
+        throw new NotImplementedException();
+    }
+
+    public Task<ChangeRequestModel> UpdateStartDate(BookingRequestId id, string? proposedYear, string? proposedMonth, string? proposedDayOfMonth)
+    {
+        throw new NotImplementedException();
+    }
+
+    public Task<ChangeRequestModel> UpdateEndDate(BookingRequestId id, bool? isEndDateKnown, string? proposedYear, string? proposedMonth,
+        string? proposedDayOfMonth)
+    {
+        throw new NotImplementedException();
+    }
+
+    public Task<ChangeRequestModel> UpdateReviewDates(BookingRequestId id, List<DateOnly> proposedReviewDates)
+    {
+        throw new NotImplementedException();
+    }
+
+    public Task<ChangeRequestModel> UpdateReviewDate(BookingRequestId bookingRequestId, DateOnly? proposedReviewDate)
+    {
+        throw new NotImplementedException();
+    }
+}

src/ServiceAssessmentService/ServiceAssessmentService.WebApp.Test/Book/FakeNotImplementedLookupsReadService.cs

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+using ServiceAssessmentService.WebApp.Models;
+using System.Diagnostics.CodeAnalysis;
+using ServiceAssessmentService.WebApp.Services.Lookups;
+
+namespace ServiceAssessmentService.WebApp.Test.Book;
+
+/// <summary>
+/// Stub fake booking request read service.
+/// All implementations of interface methods throw NotImplementedException,
+/// and are virtual so that they may be overridden as required.
+/// </summary>
+[ExcludeFromCodeCoverage]
+public class FakeNotImplementedLookupsReadService : ILookupsReadService
+{
+    public virtual Task<IEnumerable<Phase>> GetPhases()
+    {
+        throw new NotImplementedException();
+    }
+
+    public virtual Task<IEnumerable<AssessmentType>> GetAssessmentTypes()
+    {
+        throw new NotImplementedException();
+    }
+}

src/ServiceAssessmentService/ServiceAssessmentService.WebApp.Test/Book/Request/QuestionAssessmentTypePostTests.cs

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+using AngleSharp.Dom;
+using AngleSharp.Html.Dom;
+using FluentAssertions;
+using FluentAssertions.Execution;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.DependencyInjection;
+using ServiceAssessmentService.WebApp.Controllers.Book;
+using ServiceAssessmentService.WebApp.Models;
+using ServiceAssessmentService.WebApp.Services.Lookups;
+using ServiceAssessmentService.WebApp.Test.TestHelpers;
+using Xunit;
+
+namespace ServiceAssessmentService.WebApp.Test.Book.Request;
+
+public class QuestionAssessmentTypePostTests : IClassFixture<WebApplicationFactory<Program>>
+{
+    private const string Url = "/Book/BookingRequest/AssessmentType";
+
+    private readonly WebApplicationFactory<Program> _factory;
+
+    private static readonly IEnumerable<AssessmentType> SampleAssessmentTypes = new List<AssessmentType>
+    {
+        new() { Id = "assessment_type_30", DisplayNameLowerCase = "Assessment Type 30", IsEnabled = false, SortOrder = 30},
+        new() { Id = "assessment_type_10", DisplayNameLowerCase = "Assessment Type 10", IsEnabled = true, SortOrder = 10},
+        new() { Id = "assessment_type_20", DisplayNameLowerCase = "Assessment Type 20", IsEnabled = false, SortOrder = 20},
+    };
+
+    public QuestionAssessmentTypePostTests(WebApplicationFactory<Program> factory)
+    {
+        _factory = factory;
+    }
+
+
+    private WebApplicationFactory<Program> FactoryWithFakeApiReturningThreeAssessmentTypes => _factory.WithWebHostBuilder(builder =>
+        {
+            builder.ConfigureTestServices(services =>
+            {
+                services.AddScoped<ILookupsReadService, FakeLookupsReadServiceThreeAssessmentTypes>();
+            });
+        });
+
+
+
+    [Fact]
+    public async Task GivenApiDefiningAssessmentTypes_WhenSubmittingValidValues_ResponseCodeMustBeRedirect()
+    {
+        // Arrange
+        var client = FactoryWithFakeApiReturningThreeAssessmentTypes
+            .CreateClient(
+                new WebApplicationFactoryClientOptions
+                {
+                    // On form submission, should receive POST and redirect -- do not follow this redirect
+                    AllowAutoRedirect = false,
+                }
+            );
+
+        // Must perform post after a get, to first generate/fetch/include the CSRF token (used within the subsequent post)
+        var responseGet = await client.GetAsync(Url);
+        var contentGet = await HtmlHelpers.GetDocumentAsync(responseGet);
+
+        // Get the (single) form/submit button from within the page body (ignoring, e.g., forms within the header/footer).
+        // If more than one is found, this is a problem and should be flagged as an error.
+        var mainPageContentSection = contentGet.QuerySelectorAll(".main--content").Single();
+        var formElement = mainPageContentSection.QuerySelectorAll<IHtmlFormElement>("form").Single();
+        var submitButtonElement = formElement.QuerySelectorAll<IHtmlButtonElement>("button[type='submit']").Single();
+
+        // Set one of the values to "checked" (i.e., radio button is selected)
+        var arbitraryIdFromApi = SampleAssessmentTypes.Where(x => x.IsEnabled).Take(1).Single().Id;
+        var radioElements = formElement.QuerySelectorAll<IHtmlInputElement>("input[name='" + AssessmentTypeDto.FormName + "']");
+        var peerReviewRadioElement = radioElements.Single(x => arbitraryIdFromApi.Equals(x.GetAttribute("value"), StringComparison.Ordinal));
+        peerReviewRadioElement.IsChecked = true;
+
+
+        // Act
+        var postResponse = await client.SendAsync(formElement, submitButtonElement);
+
+        // Assert
+        // TODO: Consider extracting this out to helper method, to avoid duplication across tests?
+        using (new AssertionScope())
+        {
+            postResponse.StatusCode.Should().Be(System.Net.HttpStatusCode.Redirect, "because a successful form submission should accept/process the POST then redirect to the next page (preventing the user from refreshing the browser and re-submitting data)");
+
+            // Redundant additional checks, but provides extra information in case of failure.
+            int statusCode = (int)postResponse.StatusCode;
+            statusCode.Should().NotBe(400, "because if this is returned, it indicates the form value was not received (likely developer/test error, a mistake in setting up the fake API responses perhaps? note that if the radio/option is disabled, the value does not get submitted with the form)");
+            statusCode.Should().NotBe(422, "because if this is returned, an unexpected/unprocessable form value was submitted (likely developer/test error)");
+        }
+    }
+
+    // TODO: Validate where the form redirects to on a successful submit
+    // - should be the next page in the flow, e.g., the "request started" question page or the "select project phase" question page (if implemented)
+
+    // TODO: Consider side-effects (trigger of a write API request)
+    // - Current flow is that a successful submit creates a new assessment request
+    // - Next implementations will ask about the phase (which may/may not defer creating a new assessment request)
+
+    // TODO: Error cases
+    // - No form value
+    // - Wholly inappropriate value
+    // - Normally valid but disabled value
+    // - Check what error messages get returned in each of the above cases
+    // - Missing CSRF token
+    // - Invalid CSRF token
+    // - Re-used CSRF token
+
+
+
+    public class FakeLookupsReadServiceThreeAssessmentTypes : FakeNotImplementedLookupsReadService
+    {
+        public override Task<IEnumerable<AssessmentType>> GetAssessmentTypes()
+        {
+            return Task.FromResult(SampleAssessmentTypes);
+        }
+    }
+
+}