jobtrackingapp/JobTrackerApi.Tests/CvAiReadinessTests.cs

using System.Text.Json;
using System.Security.Claims;
using JobTrackerApi.Controllers;
using JobTrackerApi.Tests.TestSupport;
using JobTrackerApi.Data;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using Microsoft.AspNetCore.DataProtection;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Data.Sqlite;
using Microsoft.EntityFrameworkCore;
using Moq;
using Xunit;

namespace JobTrackerApi.Tests;

public sealed class CvAiReadinessTests
{
    private const string Source = "Built and maintained internal web applications.";
    private const string Paraphrase = "Developed and maintained internal web applications.";
    private sealed class Fixture : IAsyncDisposable
    {
        public readonly SqliteConnection Connection = new("Data Source=:memory:");
        public readonly Mock<ISummarizerService> Ai = new();
        public readonly IDataProtectionProvider Protection = new EphemeralDataProtectionProvider();
        public JobTrackerContext Db = null!;
        public CareerProfileService Career = null!;
        public CvVariantService Variants = null!;
        public CvAiSuggestionService Suggestions = null!;
        public CvVariant Cv = null!;
        public StructuredCvProfile Profile = new() { Contact = new() { FullName = "Åse Synthetic", Headline = Source }, Summary = { Source } };

        public async Task Open()
        {
            await Connection.OpenAsync();
            var current = new Mock<ICurrentUserService>();
            current.SetupGet(value => value.UserId).Returns("owner");
            Db = new(new DbContextOptionsBuilder<JobTrackerContext>().UseSqlite(Connection).Options, current.Object);
            await Db.Database.EnsureCreatedAsync();
            Career = new(Db);
            await Career.SaveVersionAsync("owner", Profile, "manual", default);
            Variants = new(Db, Career, new ThemedCvRenderer());
            Cv = await Variants.CreateAsync("owner", "Synthetic CV", null, new CvVariantSettings(), default);
            Suggestions = new(Db, Career, Variants, Ai.Object, Protection);
            Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(),
                It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
                .ReturnsAsync(new AiGenerationResult(Paraphrase));
            Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), It.IsAny<string>(),
                It.IsAny<string?>(), It.IsAny<CancellationToken>()))
                .ReturnsAsync((string candidate, string proposal, string? context, CancellationToken ct) =>
                    new AiGenerationResult(Assessment(proposal, Source)));
        }

        public Task<CvAiProposal> Generate(string? context = null, string target = "section:summary") =>
            Suggestions.GenerateAsync("owner", Cv.Id, 1, target, "improve", Source, context, "Rewrite supported facts only.", default);
        public CvVariantController Controller(bool reviewAvailable = true)
        {
            var user = new ApplicationUser { Id = "owner" };
            var users = TestHostFactory.CreateUserManager(user);
            users.Setup(value => value.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
            return new(users.Object, Variants, Mock.Of<ICvPdfExporter>(), Ai.Object, suggestions: reviewAvailable ? Suggestions : null)
            { ControllerContext = new() { HttpContext = new DefaultHttpContext
                { User = new ClaimsPrincipal(new ClaimsIdentity(new[] { new Claim(ClaimTypes.NameIdentifier, "owner") }, "local")) } } };
        }
        public async Task AssertUnchanged()
        {
            Db.ChangeTracker.Clear();
            var saved = await Db.CvVariants.SingleAsync();
            Assert.Equal(1, saved.Version);
            Assert.Null(CvVariantSettingsJson.Deserialize(saved.SettingsJson).Headline);
            Assert.Empty(CvVariantSettingsJson.Deserialize(saved.SettingsJson).Sections);
            Assert.Single(await Db.CvVariantVersions.ToListAsync());
            Assert.Equal(Source, (await Career.LoadStructuredForOwnerAsync("owner", default)).Contact.Headline);
            Assert.Single(await Db.CareerProfileVersions.ToListAsync());
        }
        public async ValueTask DisposeAsync() { await Db.DisposeAsync(); await Connection.DisposeAsync(); }
    }

    private static string Assessment(string proposal, string source, string verdict = "supported") => JsonSerializer.Serialize(new
    { verdict, coverageComplete = true, claims = new[] { new { text = proposal, verdict, sourceQuotes = new[] { source } } } });

    [Theory]
    [InlineData(Paraphrase)]
    [InlineData("Maintained internal web applications.")]
    public async Task Grounded_rewriting_is_applied_only_on_accept_and_uses_normal_history(string rewrite)
    {
        await using var fixture = new Fixture(); await fixture.Open();
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(rewrite));
        var proposal = await fixture.Generate();
        await fixture.AssertUnchanged(); // generation has no content/history mutation
        var accepted = await fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, null, default);
        Assert.Equal(2, accepted.Version);
        Assert.Equal(rewrite, CvVariantSettingsJson.Deserialize(accepted.SettingsJson).Sections.Single().Items!.Single());
        Assert.Equal("ai:improve", (await fixture.Db.CvVariantVersions.OrderBy(value => value.Version).LastAsync()).Source);
        Assert.Equal(Source, (await fixture.Career.LoadStructuredForOwnerAsync("owner", default)).Summary.Single());
        Assert.Equal(Source, (await fixture.Career.LoadStructuredForOwnerAsync("owner", default)).Contact.Headline);
        var historical = await fixture.Db.CvVariantVersions.SingleAsync(value => value.Version == 1);
        Assert.Empty(CvVariantSettingsJson.Deserialize(historical.SettingsJson).Sections);
        var replay = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, null, default));
        Assert.Equal(409, replay.Status);
    }

    [Theory]
    [InlineData("Experienced with Kubernetes.")]
    [InlineData("Senior engineer at Microsoft.")]
    [InlineData("Completed a master's degree and Azure certification.")]
    [InlineData("Managed 50 engineers at Microsoft and increased revenue 300%.")]
    [InlineData("Built internal web applications and led international security audits.")]
    [InlineData("Flytende fransk og sertifisert prosjektleder.")]
    [InlineData("Worked at Microsoft from 2018 to 2025.")]
    public async Task Fabricated_or_mixed_provider_output_cannot_obtain_an_applicable_proposal(string invented)
    {
        await using var fixture = new Fixture(); await fixture.Open();
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(invented));
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(Assessment(invented, Source, "unsupported")));
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Generate());
        Assert.Equal(422, error.Status);
        Assert.Equal("cv_ai_grounding_unproven", error.Code);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Job_requirements_are_context_not_candidate_evidence()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        const string requirement = "Kubernetes required";
        const string invented = "Experienced with Kubernetes";
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(invented));
        // Even a 'supported' verdict cannot cite the advert as candidate evidence.
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), invented, requirement, It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(Assessment(invented, requirement)));
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Generate(requirement));
        Assert.Equal(422, error.Status);
        fixture.Ai.Verify(value => value.EvaluateCvRewriteAsync(It.Is<string>(source => !source.Contains("Kubernetes")), invented, requirement, It.IsAny<CancellationToken>()), Times.Once);
        await fixture.AssertUnchanged();
    }

    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public async Task Pending_proposal_cannot_overwrite_newer_CV_or_canonical_source(bool canonical)
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Generate();
        if (canonical)
        {
            fixture.Profile.Summary = ["Newer canonical user content"];
            await fixture.Career.SaveVersionAsync("owner", fixture.Profile, "manual", default);
        }
        else await fixture.Variants.SaveAsync("owner", fixture.Cv.Id, null,
            new CvVariantSettings { Headline = "Newer CV user content" }, "manual", 1, default);
        var historyCount = await fixture.Db.CvVariantVersions.CountAsync();
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, null, default));
        Assert.Equal(409, error.Status);
        Assert.Equal("cv_ai_source_changed", error.Code);
        fixture.Db.ChangeTracker.Clear();
        Assert.Equal(historyCount, await fixture.Db.CvVariantVersions.CountAsync());
        var saved = CvVariantSettingsJson.Deserialize((await fixture.Db.CvVariants.SingleAsync()).SettingsJson);
        Assert.Empty(saved.Sections);
        if (canonical) Assert.Equal("Newer canonical user content", (await fixture.Career.LoadStructuredForOwnerAsync("owner", default)).Summary.Single());
        else Assert.Equal("Newer CV user content", saved.Headline);
    }

    [Fact]
    public async Task Source_change_during_generation_does_not_issue_a_stale_proposal()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .Returns(async () =>
            {
                await fixture.Variants.SaveAsync("owner", fixture.Cv.Id, null, new CvVariantSettings { Headline = "Newer" }, "manual", 1, default);
                return new AiGenerationResult(Paraphrase);
            });
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Generate());
        Assert.Equal(409, error.Status);
        Assert.Equal(2, await fixture.Db.CvVariantVersions.CountAsync());
    }

    [Fact]
    public async Task Canonical_change_during_edited_proposal_review_is_checked_again_before_save()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Generate();
        const string shortened = "Maintained internal web applications.";
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), shortened, It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .Returns(async () =>
            {
                fixture.Profile.Summary = ["Newer canonical content"];
                await fixture.Career.SaveVersionAsync("owner", fixture.Profile, "manual", default);
                return new AiGenerationResult(Assessment(shortened, Source));
            });
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, shortened, default));
        Assert.Equal(409, error.Status);
        fixture.Db.ChangeTracker.Clear();
        Assert.Single(await fixture.Db.CvVariantVersions.ToListAsync());
        Assert.Equal(1, (await fixture.Db.CvVariants.SingleAsync()).Version);
        Assert.Equal("Newer canonical content", (await fixture.Career.LoadStructuredForOwnerAsync("owner", default)).Summary.Single());
    }

    [Fact]
    public async Task Whitespace_consistency_check_does_not_block_supported_rewriting()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Suggestions.GenerateAsync("owner", fixture.Cv.Id, 1, "section:summary", "improve", "  " + Source + "\r\n\n", null, "Rewrite", default);
        Assert.Equal(Source, proposal.Original);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Whole_document_proposal_cannot_review_multiple_headline_items_then_drop_one_on_apply()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        const string invalid = "[{\"id\":\"headline\",\"items\":[\"First\",\"Second\"]},{\"id\":\"section:summary\",\"title\":\"Summary\",\"items\":[]}]";
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), AiGenerationOutputMode.CvBlocksJson, It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(invalid));
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.GenerateAsync("owner", fixture.Cv.Id, 1, null, "document-improve", null, null, "Rewrite", default));
        Assert.Equal("cv_ai_proposal_invalid", error.Code);
        fixture.Ai.Verify(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string?>(), It.IsAny<CancellationToken>()), Times.Never);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Edited_proposal_is_re_evaluated_and_unsupported_edit_has_no_mutation()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Generate();
        const string invented = "Invented job at Microsoft";
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), invented, It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(Assessment(invented, Source, "unsupported")));
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, invented, default));
        Assert.Equal(422, error.Status);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Tampered_token_cannot_bypass_grounding_or_select_another_target()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Generate();
        var error = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, "forged-grounded-true-" + proposal.ProposalToken, null, default));
        Assert.Equal(400, error.Status);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Protected_proposal_is_bound_to_owner_and_intended_CV()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Generate();
        var ownerError = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("other-account", fixture.Cv.Id, proposal.ProposalToken, null, default));
        var cvError = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id + 1, proposal.ProposalToken, null, default));
        Assert.Equal(404, ownerError.Status); Assert.Equal(404, cvError.Status);
        var generation = await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Suggestions.GenerateAsync("other-account", fixture.Cv.Id, 1, "section:summary", "improve", null, null, "Rewrite", default));
        Assert.Equal(404, generation.Status);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Evaluator_unavailable_fails_closed_and_provider_error_never_changes_content()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync((AiGenerationResult?)null);
        Assert.Equal(422, (await Assert.ThrowsAsync<CvAiSuggestionException>(() => fixture.Generate())).Status);
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ThrowsAsync(new AiGenerationException("provider_unavailable", "Synthetic outage", true));
        await Assert.ThrowsAsync<AiGenerationException>(() => fixture.Generate());
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Outdated_unbound_API_request_fails_closed_before_provider_generation()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var response = await fixture.Controller().AiAssist(new("improve", Source, null, null, "en"), default);
        Assert.Equal(428, Assert.IsType<ObjectResult>(response.Result).StatusCode);
        fixture.Ai.Verify(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()), Times.Never);
        await fixture.AssertUnchanged();
    }

    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public async Task Unavailable_review_service_blocks_generation_and_apply_without_side_effects(bool apply)
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var controller = fixture.Controller(reviewAvailable: false);
        var response = apply
            ? Assert.IsType<ObjectResult>((await controller.ApplyAi(fixture.Cv.Id, new("unused-proposal", Paraphrase), default)).Result)
            : Assert.IsType<ObjectResult>((await controller.AiAssist(new("improve", Source, null, null, "en", fixture.Cv.Id, 1, "section:summary"), default)).Result);
        Assert.Equal(503, response.StatusCode);
        Assert.Equal("cv_ai_unavailable", JsonSerializer.SerializeToElement(response.Value).GetProperty("code").GetString());
        fixture.Ai.VerifyNoOtherCalls();
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Confirmed_provider_fabrication_reproduction_is_now_an_API_rejection()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        const string invented = "Managed 50 engineers at Microsoft and increased revenue 300%.";
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(invented));
        // Numerics are rejected independently, even if the evaluator asserts support.
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), invented, It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiGenerationResult(Assessment(invented, Source)));
        var response = await fixture.Controller().AiAssist(new("improve", Source, null, null, "en", fixture.Cv.Id, 1, "section:summary"), default);
        Assert.Equal(422, Assert.IsType<ObjectResult>(response.Result).StatusCode);
        await fixture.AssertUnchanged();
    }

    [Theory]
    [InlineData("ai:improve")]
    [InlineData("  AI:grammar  ")]
    public async Task Authored_save_cannot_forge_server_AI_provenance(string source)
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var response = await fixture.Controller().Save(fixture.Cv.Id,
            new(null, new CvVariantSettings { Headline = "Forged approval" }, source, 1), default);
        Assert.IsType<BadRequestObjectResult>(response.Result);
        await fixture.AssertUnchanged();
    }

    [Fact]
    public async Task Confirmed_stale_apply_reproduction_is_now_an_API_conflict()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        var proposal = await fixture.Generate();
        await fixture.Variants.SaveAsync("owner", fixture.Cv.Id, null,
            new CvVariantSettings { Headline = "Newer user content" }, "manual", 1, default);
        var response = await fixture.Controller().ApplyAi(fixture.Cv.Id, new(proposal.ProposalToken), default);
        Assert.Equal(409, Assert.IsType<ObjectResult>(response.Result).StatusCode);
        fixture.Db.ChangeTracker.Clear();
        Assert.Equal("Newer user content", CvVariantSettingsJson.Deserialize((await fixture.Db.CvVariants.SingleAsync()).SettingsJson).Headline);
        Assert.Equal(2, await fixture.Db.CvVariantVersions.CountAsync());
    }

    [Fact]
    public async Task Omitted_content_remains_editable_without_becoming_document_evidence()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        await fixture.Variants.SaveAsync("owner", fixture.Cv.Id, null,
            new CvVariantSettings { Sections = { new() { Key = "summary", Hidden = true } } }, "manual", 1, default);
        var proposal = await fixture.Suggestions.GenerateAsync("owner", fixture.Cv.Id, 2, "section:summary", "improve", Source, null, "Rewrite", default);
        var saved = await fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, null, default);
        var section = CvVariantSettingsJson.Deserialize(saved.SettingsJson).Sections.Single();
        Assert.True(section.Hidden);
        Assert.Equal(Paraphrase, section.Items!.Single());
        Assert.Equal(Source, (await fixture.Career.LoadStructuredForOwnerAsync("owner", default)).Summary.Single());
    }

    [Fact]
    public async Task Whole_document_accept_maps_known_blocks_only_and_preserves_the_rest_of_the_lens()
    {
        await using var fixture = new Fixture(); await fixture.Open();
        fixture.Profile.Jobs = [new() { Id = "experience-key", Title = "Engineer", Company = "Nordlys", Bullets = { Source } }];
        await fixture.Career.SaveVersionAsync("owner", fixture.Profile, "manual", default);
        await fixture.Variants.SaveAsync("owner", fixture.Cv.Id, null, new CvVariantSettings
        { AccentColor = "#123456", PageMarginMm = 22, Sections = { new() { Key = "experience" }, new() { Key = "summary" } } }, "manual", 1, default);
        fixture.Ai.Setup(value => value.GenerateSectionWithMetadataAsync(It.IsAny<string>(), It.IsAny<string>(), AiGenerationOutputMode.CvBlocksJson, It.IsAny<int>(), It.IsAny<int>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync((string instruction, string text, AiGenerationOutputMode mode, int max, int min, CancellationToken ct) =>
                new AiGenerationResult(text.Replace(Source, Paraphrase, StringComparison.Ordinal)));
        fixture.Ai.Setup(value => value.EvaluateCvRewriteAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync((string candidate, string proposal, string? context, CancellationToken ct) =>
            {
                using var parsed = JsonDocument.Parse(proposal);
                var values = parsed.RootElement.EnumerateArray().SelectMany(block => block.EnumerateObject()
                    .Where(property => property.Name != "id").SelectMany(property => property.Value.ValueKind == JsonValueKind.Array
                        ? property.Value.EnumerateArray().Select(item => item.GetString()!) : new[] { property.Value.GetString()! }));
                return new AiGenerationResult(JsonSerializer.Serialize(new { verdict = "supported", coverageComplete = true,
                    claims = values.Select(value => new { text = value, verdict = "supported", sourceQuotes = new[] { value == Paraphrase ? Source : value } }) }));
            });
        var proposal = await fixture.Suggestions.GenerateAsync("owner", fixture.Cv.Id, 2, null, "document-improve", null, null, "Rewrite", default);
        var saved = await fixture.Suggestions.ApplyAsync("owner", fixture.Cv.Id, proposal.ProposalToken, null, default);
        var settings = CvVariantSettingsJson.Deserialize(saved.SettingsJson);
        Assert.Equal(3, saved.Version);
        Assert.Equal(Paraphrase, settings.Headline);
        Assert.Equal(Paraphrase, settings.Overrides["experience-key"].Bullets!.Single());
        Assert.Equal("Engineer", settings.Overrides["experience-key"].Title);
        Assert.Equal("Nordlys", settings.Overrides["experience-key"].Subtitle);
        Assert.Equal(new[] { "experience", "summary" }, settings.Sections.Select(value => value.Key));
        Assert.Equal("#123456", settings.AccentColor); Assert.Equal(22, settings.PageMarginMm);
        Assert.Equal(Source, (await fixture.Career.LoadStructuredForOwnerAsync("owner", default)).Jobs.Single().Bullets.Single());
    }
}