[CLAUDE] PurchaseEvaluation: Chunk A — BE guard target TraLai/TuChoi BẮT BUỘC decision=Reject + 3 regression test
Defense-in-depth chặn FE inconsistency (gotcha #45 — Session 21 turn 3). Bug pattern: button "← Trả lại" trong PeWorkflowPanel.tsx gửi decision=Approve khi target=TraLai do `isReject` local var thiếu nhánh TraLai → BE skip Reject branch → enter APPROVE STEP → ApproveV2Async UPSERT opinion = "đã duyệt" + advance Cấp. User UAT thấy: "Trả về nhưng hệ thống vẫn duyệt". BE guard: - Service `TransitionAsync` thêm early check sau set isAdmin/isSystem - targetPhase ∈ {TraLai, TuChoi} && decision != Reject → throw ConflictException - Boundary protection cho mọi caller tương lai (API client / mobile / cron) Tests (Infra suite +3): - TransitionAsync_TargetTraLai_WithApproveDecision_Throws_AndDoesNotMutateState - TransitionAsync_TargetTuChoi_WithApproveDecision_Throws_AndDoesNotMutateState - TransitionAsync_TargetTraLai_WithRejectDecision_SetsPhaseTraLai (happy path) + NoOpNotificationService stub reusable cho future PE service tests Verify: - dotnet test SolutionErp.slnx → 84 PASS (58 Domain + 26 Infra = +3 from 81 baseline) - Build pass (0 err, 2 warn CS8602 pre-existing DocxRenderer) Pending Chunk B: FE fix PeWorkflowPanel.tsx isReject + dialog isSendBack mirror 2 app (fe-admin + fe-user) — sync với BE guard rule. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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pqhuy1987
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using Microsoft.AspNetCore.Identity;
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using Microsoft.Extensions.DependencyInjection;
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using SolutionErp.Application.Common.Exceptions;
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using SolutionErp.Application.Notifications;
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using SolutionErp.Domain.Common;
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using SolutionErp.Domain.Contracts; // ApprovalDecision enum (shared HĐ/PE)
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using SolutionErp.Domain.Identity;
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using SolutionErp.Domain.Notifications;
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using SolutionErp.Domain.PurchaseEvaluations;
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using SolutionErp.Infrastructure.Services;
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using SolutionErp.Infrastructure.Tests.Common;
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namespace SolutionErp.Infrastructure.Tests.Services;
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// Regression test for Session 21 turn 3 bug — gotcha #45:
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// FE button "← Trả lại" trong PeWorkflowPanel gửi `decision: 1` (Approve) thay
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// vì `2` (Reject) khi target = TraLai (98). Root: `isReject` local variable
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// trong FE thiếu nhánh TraLai → payload mismatch giữa button label hiển thị
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// "Trả lại" và decision gửi BE.
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//
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// Hiệu ứng cũ trước fix: BE TransitionAsync nhận decision=Approve → skip Reject
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// branch (L51) → enter APPROVE STEP branch (L97) → ApproveV2Async UPSERT
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// opinion đánh dấu "đã duyệt" cho NV đang nhấn nút → tiến qua Cấp tiếp theo.
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// User UAT thấy: "Trả về nhưng hệ thống vẫn duyệt".
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//
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// Fix BE defense-in-depth: guard early throw ConflictException khi targetPhase
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// ∈ {TraLai, TuChoi} mà decision != Reject — chặn FE inconsistency tại
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// boundary BE thay vì depend FE đúng.
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//
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// FE fix song song trong fe-admin + fe-user PeWorkflowPanel.tsx (rule §3.9
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// mirror 2 app) — sync `isReject` + dialog `isSendBack` include TraLai.
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public class PurchaseEvaluationWorkflowServiceGuardTests
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{
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private static (PurchaseEvaluationWorkflowService svc, IdentityFixture fix, TestApplicationDbContext db)
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CreateService()
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{
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var fix = new IdentityFixture();
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var db = fix.Services.GetRequiredService<TestApplicationDbContext>();
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var um = fix.Services.GetRequiredService<UserManager<User>>();
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var dt = new FixedDateTime(new DateTime(2026, 5, 12, 0, 0, 0, DateTimeKind.Utc));
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var notify = new NoOpNotificationService();
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var svc = new PurchaseEvaluationWorkflowService(db, dt, notify, um);
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return (svc, fix, db);
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}
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private static PurchaseEvaluation BuildPeInChoDuyet(string code = "PE-GUARD-001")
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{
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return new PurchaseEvaluation
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{
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Id = Guid.NewGuid(),
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Type = PurchaseEvaluationType.DuyetNcc,
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Phase = PurchaseEvaluationPhase.ChoDuyet,
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MaPhieu = code,
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TenGoiThau = "Test guard bug Trả lại",
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ProjectId = Guid.NewGuid(),
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DrafterUserId = Guid.NewGuid(),
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CurrentApprovalLevelOrder = 1,
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CurrentWorkflowStepIndex = 0,
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};
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}
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[Fact]
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public async Task TransitionAsync_TargetTraLai_WithApproveDecision_Throws_AndDoesNotMutateState()
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{
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// Arrange: phiếu PE ở ChoDuyet (typical intermediate state khi approver duyệt)
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var (svc, fix, db) = CreateService();
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using (fix)
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{
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var pe = BuildPeInChoDuyet();
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db.PurchaseEvaluations.Add(pe);
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await db.SaveChangesAsync(CancellationToken.None);
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// Act: simulate FE bug payload — button "← Trả lại" gửi decision=Approve
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// thay vì Reject (gotcha #45 root cause).
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var act = async () => await svc.TransitionAsync(
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evaluation: pe,
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targetPhase: PurchaseEvaluationPhase.TraLai,
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actorUserId: Guid.NewGuid(),
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actorRoles: new[] { AppRoles.CostControl },
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decision: ApprovalDecision.Approve,
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comment: "test guard mismatch",
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ct: CancellationToken.None);
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// Assert: BE chặn payload mismatch sớm + state phiếu KHÔNG đổi
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await act.Should().ThrowAsync<ConflictException>()
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.WithMessage("*TraLai*Reject*");
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pe.Phase.Should().Be(PurchaseEvaluationPhase.ChoDuyet,
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"Guard chặn trước khi mutate phase");
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pe.CurrentApprovalLevelOrder.Should().Be(1,
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"Guard chặn trước khi advance level pointer");
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}
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}
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[Fact]
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public async Task TransitionAsync_TargetTuChoi_WithApproveDecision_Throws_AndDoesNotMutateState()
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{
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// Tương tự TraLai — TuChoi cũng BẮT BUỘC decision=Reject. Defense
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// double-cover invariant (FE chỉ bug TraLai branch nhưng guard nên cover
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// luôn TuChoi cho consistency).
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var (svc, fix, db) = CreateService();
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using (fix)
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{
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var pe = BuildPeInChoDuyet("PE-GUARD-002");
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db.PurchaseEvaluations.Add(pe);
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await db.SaveChangesAsync(CancellationToken.None);
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var act = async () => await svc.TransitionAsync(
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evaluation: pe,
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targetPhase: PurchaseEvaluationPhase.TuChoi,
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actorUserId: Guid.NewGuid(),
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actorRoles: new[] { AppRoles.CostControl },
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decision: ApprovalDecision.Approve,
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comment: "test guard tu choi",
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ct: CancellationToken.None);
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await act.Should().ThrowAsync<ConflictException>()
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.WithMessage("*TuChoi*Reject*");
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pe.Phase.Should().Be(PurchaseEvaluationPhase.ChoDuyet);
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}
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}
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[Fact]
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public async Task TransitionAsync_TargetTraLai_WithRejectDecision_SetsPhaseTraLai()
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{
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// Happy path control test: decision=Reject + target=TraLai → BE đi vào
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// Reject branch (L51), set Phase=TraLai, clear pointer. Verify fix
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// KHÔNG break flow Trả lại đúng.
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var (svc, fix, db) = CreateService();
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using (fix)
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{
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var pe = BuildPeInChoDuyet("PE-GUARD-003");
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db.PurchaseEvaluations.Add(pe);
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await db.SaveChangesAsync(CancellationToken.None);
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await svc.TransitionAsync(
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evaluation: pe,
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targetPhase: PurchaseEvaluationPhase.TraLai,
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actorUserId: Guid.NewGuid(),
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actorRoles: new[] { AppRoles.CostControl },
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decision: ApprovalDecision.Reject,
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comment: "trả lại sửa lại đi",
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ct: CancellationToken.None);
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pe.Phase.Should().Be(PurchaseEvaluationPhase.TraLai,
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"Reject branch set Phase=TraLai");
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pe.CurrentApprovalLevelOrder.Should().BeNull("Trả lại clear level pointer");
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pe.CurrentWorkflowStepIndex.Should().BeNull("Trả lại clear step pointer");
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pe.SlaDeadline.Should().BeNull("Trả lại clear SLA");
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}
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}
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}
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// Stub: not assert side effects of notify (out-of-scope cho guard test).
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// Pattern reuse cho future PE service tests.
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internal sealed class NoOpNotificationService : INotificationService
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{
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public Task NotifyAsync(
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Guid userId,
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NotificationType type,
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string title,
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string? description = null,
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string? href = null,
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Guid? refId = null,
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CancellationToken ct = default) => Task.CompletedTask;
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public Task NotifyManyAsync(
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IEnumerable<Guid> userIds,
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NotificationType type,
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string title,
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string? description = null,
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string? href = null,
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Guid? refId = null,
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CancellationToken ct = default) => Task.CompletedTask;
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}
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