Merge pull request 'fix: issue #29 — integration tests flakiness (DB split + SqlTestFixture consolidado)' (#34) from fix/issue-29-flakiness into main

DATETIME2(3) + cursor roundtrip via O format perdía sub-ms de
DateTime.UtcNow causando ~37% flake rate. Timestamp fijo con sub-ms=0
elimina la ambigüedad.

Fixes residual flake del issue #29.

database/README.md

@@ -29,6 +29,9 @@ database/
 | **V010** | **`V010__audit_infrastructure.sql`** | **UDT-010** | **Infra de auditoría + Temporal Tables. Ver nota abajo.** |
 | V011 | `V011__create_medio_seccion.sql` | ADM-001 | Medio + Seccion (temporal, retention 10y) + permiso `administracion:secciones:gestionar` |
 | V012 | `V012__seed_medios.sql` | ADM-001 | Seed idempotente de Medios ELDIA y ELPLATA |
+| V013 | `V013__create_punto_de_venta.sql` | ADM-008 | PuntoDeVenta (temporal) + permiso `administracion:puntosdeventa:gestionar` |
+| V014 | `V014__create_tipo_de_iva_ingresos_brutos.sql` | ADM-009 | TipoDeIva + IngresosBrutos (temporales con vigencias) + permiso fiscal |
+| V015 | `V015__create_audit_views.sql` | UDT-011 | Vistas `v_AuditEvent_Local` + `v_SecurityEvent_Local` con timezone local |
 
 ## Convenciones
 
@@ -36,23 +39,24 @@ database/
 - **Idempotentes**: cada migración usa `IF NOT EXISTS` / `MERGE` / `IF NOT EXISTS (SELECT 1 FROM sys....)`. Re-ejecutarlas es seguro.
 - **Boilerplate** inicial: `SET QUOTED_IDENTIFIER ON; SET ANSI_NULLS ON; SET NOCOUNT ON; GO`.
 - **Naming**: `PK_*`, `UQ_*`, `FK_*`, `DF_*`, `CK_*`, `IX_*`.
-- **Se aplican a AMBAS bases**: `SIGCM2` (dev) y `SIGCM2_Test` (integration tests). El orden debe ser idéntico.
+- **Se aplican a TRES bases**: `SIGCM2` (dev), `SIGCM2_Test_App` (Application.Tests) y `SIGCM2_Test_Api` (Api.Tests). El orden debe ser idéntico en las tres.
 
 ## Cómo aplicar migraciones
 
 ### En dev (manual)
 
 ```bash
-# Con sqlcmd:
+# Con sqlcmd (aplicar a las tres bases en orden):
 sqlcmd -S TECNICA3 -d SIGCM2           -U desarrollo -P desarrollo2026 -i database/migrations/V010__audit_infrastructure.sql
-sqlcmd -S TECNICA3 -d SIGCM2_Test -U desarrollo -P desarrollo2026 -i database/migrations/V010__audit_infrastructure.sql
+sqlcmd -S TECNICA3 -d SIGCM2_Test_App  -U desarrollo -P desarrollo2026 -i database/migrations/V010__audit_infrastructure.sql
+sqlcmd -S TECNICA3 -d SIGCM2_Test_Api  -U desarrollo -P desarrollo2026 -i database/migrations/V010__audit_infrastructure.sql
 ```
 
 O desde SSMS: abrir el archivo, conectar a cada base, F5.
 
 ### En integration tests
 
-`tests/SIGCM2.TestSupport/SqlTestFixture.cs` aplica automáticamente el schema necesario en `SIGCM2_Test` al inicializar el fixture (`EnsureV008SchemaAsync`, `EnsureV009SchemaAsync`, `EnsureV010SchemaAsync`…). **NO** hace falta correr el script manualmente.
+`tests/SIGCM2.TestSupport/SqlTestFixture.cs` aplica automáticamente el schema necesario en `SIGCM2_Test_App` al inicializar el fixture (`EnsureV008SchemaAsync`, `EnsureV009SchemaAsync`, `EnsureV010SchemaAsync`…). `TestWebAppFactory` hace lo mismo contra `SIGCM2_Test_Api`. **NO** hace falta correr los scripts manualmente si el fixture ya lo cubre.
 
 ### En producción (roadmap futuro)
 
@@ -90,6 +94,22 @@ O desde SSMS: abrir el archivo, conectar a cada base, F5.
 - `Seccion.Tipo` acepta `'clasificados' | 'notables' | 'suplementos'` (CHECK constraint). Config avanzada (par/impar, suplementos, cupos) se introduce en ADM-003.
 - Rollback: `V012_ROLLBACK.sql` (falla si hay Secciones vivas) → `V011_ROLLBACK.sql`. Rollback en prod NO soportado si ADM-008/009 o PRC-* ya aplicados.
 
+## Bases de datos de integration tests
+
+| Base | Propósito | Usada por |
+|---|---|---|
+| `SIGCM2_Test_App` | Tests de repositorios y Application layer | `SIGCM2.Application.Tests` vía `SqlTestFixture` (parameterless ctor) |
+| `SIGCM2_Test_Api` | Tests de endpoints HTTP / WebApplicationFactory | `SIGCM2.Api.Tests` vía `TestWebAppFactory` |
+
+**Script de creación inicial** (idempotente): `database/init/create-test-api-db.sql`
+
+Ambas bases deben tener **todas las migraciones V001–V015** aplicadas en orden. Al crear una base nueva o al agregar un desarrollador:
+1. Crear las bases con `create-test-api-db.sql`
+2. Aplicar V001–V015 en orden (ver tabla de arriba) contra cada base de test
+3. Las `EnsureV0XX` del fixture validan presencia; no aplican migraciones pesadas
+
+Fuente única de connection strings: `tests/SIGCM2.TestSupport/TestConnectionStrings.cs`
+
 ## Recursos
 
 - Design autoritativo: `Obsidian/02-ARQUITECTURA-y-TECH-STACK/2.5 📋 Auditoría.md`

database/init/create-test-api-db.sql

@@ -0,0 +1,30 @@
+-- create-test-api-db.sql
+-- Creates test databases for integration tests (idempotent).
+-- Run once per environment on TECNICA3 before executing integration tests.
+--
+-- SIGCM2_Test_App  -> used by SIGCM2.Application.Tests
+-- SIGCM2_Test_Api  -> used by SIGCM2.Api.Tests
+-- SIGCM2_Test      -> legacy (kept for old branches e.g. pre-merge CAT-001)
+--
+-- After creating the DBs, apply V010 to both new DBs:
+--   See database/README.md > "Test DBs" section for the PowerShell runbook.
+
+IF DB_ID(N'SIGCM2_Test_App') IS NULL
+BEGIN
+    CREATE DATABASE [SIGCM2_Test_App]
+        COLLATE Modern_Spanish_CI_AS;
+    PRINT 'Database SIGCM2_Test_App created.';
+END
+ELSE
+    PRINT 'Database SIGCM2_Test_App already exists -- skip.';
+GO
+
+IF DB_ID(N'SIGCM2_Test_Api') IS NULL
+BEGIN
+    CREATE DATABASE [SIGCM2_Test_Api]
+        COLLATE Modern_Spanish_CI_AS;
+    PRINT 'Database SIGCM2_Test_Api created.';
+END
+ELSE
+    PRINT 'Database SIGCM2_Test_Api already exists -- skip.';
+GO

tests/SIGCM2.Api.Tests/Admin/FiscalControllerTests.cs

@@ -17,8 +17,7 @@ namespace SIGCM2.Api.Tests.Admin;
 [Collection("ApiIntegration")]
 public sealed class FiscalControllerTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string IvaEndpoint = "/api/v1/admin/fiscal/iva";
     private const string IibbEndpoint = "/api/v1/admin/fiscal/iibb";

tests/SIGCM2.Api.Tests/Admin/MediosControllerTests.cs

@@ -15,8 +15,7 @@ namespace SIGCM2.Api.Tests.Admin;
 [Collection("ApiIntegration")]
 public sealed class MediosControllerTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string Endpoint = "/api/v1/admin/medios";
     private const string AdminUsername = "admin";

tests/SIGCM2.Api.Tests/Admin/PuntosDeVentaControllerTests.cs

@@ -16,8 +16,7 @@ namespace SIGCM2.Api.Tests.Admin;
 [Collection("ApiIntegration")]
 public sealed class PuntosDeVentaControllerTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string Endpoint = "/api/v1/admin/puntos-de-venta";
     private const string MediosEndpoint = "/api/v1/admin/medios";

tests/SIGCM2.Api.Tests/Admin/SeccionesControllerTests.cs

@@ -15,8 +15,7 @@ namespace SIGCM2.Api.Tests.Admin;
 [Collection("ApiIntegration")]
 public sealed class SeccionesControllerTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string Endpoint = "/api/v1/admin/secciones";
     private const string MediosEndpoint = "/api/v1/admin/medios";

tests/SIGCM2.Api.Tests/Admin/V014MigrationTests.cs

@@ -21,8 +21,7 @@ namespace SIGCM2.Api.Tests.Admin;
 [Collection("ApiIntegration")]
 public sealed class V014MigrationTests : IClassFixture<SIGCM2.TestSupport.TestWebAppFactory>
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.ApiTestDb;
 
     public V014MigrationTests(SIGCM2.TestSupport.TestWebAppFactory _)
     {

tests/SIGCM2.Api.Tests/Admin/V015MigrationTests.cs

@@ -21,8 +21,7 @@ namespace SIGCM2.Api.Tests.Admin;
 [Collection("ApiIntegration")]
 public sealed class V015MigrationTests : IClassFixture<SIGCM2.TestSupport.TestWebAppFactory>
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.ApiTestDb;
 
     public V015MigrationTests(SIGCM2.TestSupport.TestWebAppFactory _)
     {

tests/SIGCM2.Api.Tests/Audit/AuditControllerTests.cs

@@ -18,8 +18,7 @@ namespace SIGCM2.Api.Tests.Audit;
 [Collection("ApiIntegration")]
 public sealed class AuditControllerTests : IClassFixture<TestWebAppFactory>
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.ApiTestDb;
 
     private readonly TestWebAppFactory _factory;
 

tests/SIGCM2.Api.Tests/Audit/TransactionScopeSpikeTests.cs

@@ -12,8 +12,7 @@ namespace SIGCM2.Api.Tests.Audit;
 [Collection("ApiIntegration")]
 public sealed class TransactionScopeSpikeTests
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.ApiTestDb;
 
     [Fact]
     public async Task TransactionScope_DoesNotEscalateToMSDTC_WithSingleConnectionString()

tests/SIGCM2.Api.Tests/Audit/V010MigrationTests.cs

@@ -13,8 +13,7 @@ namespace SIGCM2.Api.Tests.Audit;
 [Collection("ApiIntegration")]
 public sealed class V010MigrationTests : IClassFixture<SIGCM2.TestSupport.TestWebAppFactory>
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.ApiTestDb;
 
     public V010MigrationTests(SIGCM2.TestSupport.TestWebAppFactory _)
     {

tests/SIGCM2.Api.Tests/Permisos/PermisosEndpointTests.cs

@@ -15,8 +15,7 @@ namespace SIGCM2.Api.Tests.Permisos;
 [Collection("ApiIntegration")]
 public sealed class PermisosEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string AdminUsername = "admin";
     private const string AdminPassword = "@Diego550@";

tests/SIGCM2.Api.Tests/Roles/RolesEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Roles;
 [Collection("ApiIntegration")]
 public sealed class RolesEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string Endpoint = "/api/v1/roles";
     private const string AdminUsername = "admin";

tests/SIGCM2.Api.Tests/SIGCM2.Api.Tests.csproj

@@ -27,6 +27,7 @@
 
   <ItemGroup>
     <Using Include="Xunit" />
+    <Using Include="SIGCM2.TestSupport" />
   </ItemGroup>
 
 </Project>

tests/SIGCM2.Api.Tests/Usuarios/ChangeMyPasswordEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class ChangeMyPasswordEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     // This hash corresponds to "@Diego550@"
     private const string DefaultHash = "$2a$12$rmq6tlSAQ8WXhR2CwLCSeuwCJKz/.8Eab95UQCUNfwe4dokeOqMcW";

tests/SIGCM2.Api.Tests/Usuarios/CreateUsuarioEndpointTests.cs

@@ -17,8 +17,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class CreateUsuarioEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string Endpoint = "/api/v1/users";
     private const string AdminUsername = "admin";

tests/SIGCM2.Api.Tests/Usuarios/DeactivateReactivateEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class DeactivateReactivateEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private readonly HttpClient _client;
     private readonly SqlTestFixture _db;

tests/SIGCM2.Api.Tests/Usuarios/GetUsuarioByIdEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class GetUsuarioByIdEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private readonly HttpClient _client;
     private readonly SqlTestFixture _db;

tests/SIGCM2.Api.Tests/Usuarios/ListUsuariosEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class ListUsuariosEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private readonly HttpClient _client;
     private readonly SqlTestFixture _db;

tests/SIGCM2.Api.Tests/Usuarios/ResetPasswordEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class ResetPasswordEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private readonly HttpClient _client;
     private readonly SqlTestFixture _db;

tests/SIGCM2.Api.Tests/Usuarios/UpdateUsuarioEndpointTests.cs

@@ -14,8 +14,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class UpdateUsuarioEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private readonly HttpClient _client;
     private readonly SqlTestFixture _db;

tests/SIGCM2.Api.Tests/Usuarios/UsuarioPermisosEndpointTests.cs

@@ -15,8 +15,7 @@ namespace SIGCM2.Api.Tests.Usuarios;
 [Collection("ApiIntegration")]
 public sealed class UsuarioPermisosEndpointTests : IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     private const string AdminUsername = "admin";
     private const string AdminPassword = "@Diego550@";

tests/SIGCM2.Application.Tests/DatabaseCollection.cs

@@ -0,0 +1,15 @@
+using SIGCM2.TestSupport;
+using Xunit;
+
+namespace SIGCM2.Application.Tests;
+
+/// <summary>
+/// Declares the "Database" xUnit collection backed by a single shared SqlTestFixture.
+/// All test classes decorated with [Collection("Database")] share one fixture instance
+/// per test run — eliminating concurrent Respawner collisions.
+/// </summary>
+[CollectionDefinition("Database")]
+public sealed class DatabaseCollection : ICollectionFixture<SqlTestFixture>
+{
+    // Intentionally empty: this class only exists to declare the collection/fixture binding.
+}

tests/SIGCM2.Application.Tests/Infrastructure/Audit/AuditEventRepositoryTests.cs

@@ -13,8 +13,7 @@ namespace SIGCM2.Application.Tests.Infrastructure.Audit;
 [Collection("Database")]
 public sealed class AuditEventRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private AuditEventRepository _repo = null!;
@@ -130,7 +129,10 @@ public sealed class AuditEventRepositoryTests : IAsyncLifetime
     [Fact]
     public async Task QueryAsync_Limit_EmitsCursor_WhenMoreRowsAvailable()
     {
-        var t0 = DateTime.UtcNow.AddMinutes(-10);
+        // Determinístico: DATETIME2(3) + cursor roundtrip via "O" format puede perder ticks
+        // sub-ms de `DateTime.UtcNow` (observado ~37% flake rate, cursor vuelve como parentesis
+        // de la página anterior). Timestamp fijo con sub-ms = 0 elimina la ambigüedad.
+        var t0 = new DateTime(2026, 4, 19, 12, 0, 0, DateTimeKind.Utc);
         await Seed(5, t0);
 
         var page1 = await _repo.QueryAsync(new AuditEventFilter(null, null, null, null, null, null, Limit: 2));

tests/SIGCM2.Application.Tests/Infrastructure/Audit/AuditJobsTests.cs

@@ -16,8 +16,7 @@ namespace SIGCM2.Application.Tests.Infrastructure.Audit;
 [Collection("Database")]
 public sealed class AuditJobsTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private SqlConnectionFactory _factory = null!;

tests/SIGCM2.Application.Tests/Infrastructure/Audit/SecurityEventRepositoryTests.cs

@@ -11,8 +11,7 @@ namespace SIGCM2.Application.Tests.Infrastructure.Audit;
 [Collection("Database")]
 public sealed class SecurityEventRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private SecurityEventRepository _repo = null!;

tests/SIGCM2.Application.Tests/Infrastructure/IngresosBrutosRepositoryTests.cs

@@ -18,8 +18,7 @@ namespace SIGCM2.Application.Tests.Infrastructure;
 [Collection("Database")]
 public class IngresosBrutosRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private IIngresosBrutosRepository _repo = null!;

tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs

@@ -1,103 +1,44 @@
 using Dapper;
-using Microsoft.Data.SqlClient;
-using Respawn;
 using SIGCM2.Domain.Entities;
 using SIGCM2.Infrastructure.Persistence;
+using SIGCM2.TestSupport;
 
 namespace SIGCM2.Application.Tests.Infrastructure;
 
 /// <summary>
-/// Integration tests for RefreshTokenRepository against SIGCM2_Test.
-/// Uses Respawn to reset the DB between test classes; the repository opens its own
+/// Integration tests for RefreshTokenRepository against SIGCM2_Test_App.
+/// Uses shared SqlTestFixture via xUnit collection fixture; the repository opens its own
 /// connections so transaction-scoped isolation would block on FK locks.
 /// </summary>
 [Collection("Database")]
 public class RefreshTokenRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
-
-    private SqlConnection _connection = null!;
-    private Respawner _respawner = null!;
+    private readonly SqlTestFixture _db;
     private RefreshTokenRepository _repository = null!;
     private int _testUserId;
 
+    public RefreshTokenRepositoryTests(SqlTestFixture db)
+    {
+        _db = db;
+    }
+
     public async Task InitializeAsync()
     {
-        _connection = new SqlConnection(ConnectionString);
-        await _connection.OpenAsync();
-
-        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
-        {
-            DbAdapter = DbAdapter.SqlServer,
-            // Rol is a lookup table seeded by migration V003 — never wipe or Usuario FK breaks.
-            TablesToIgnore =
-            [
-                new Respawn.Graph.Table("dbo", "Rol"),
-                new Respawn.Graph.Table("dbo", "Permiso"),
-                new Respawn.Graph.Table("dbo", "RolPermiso"),
-                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
-                new Respawn.Graph.Table("dbo", "Usuario_History"),
-                new Respawn.Graph.Table("dbo", "Rol_History"),
-                new Respawn.Graph.Table("dbo", "Permiso_History"),
-                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
-                // ADM-001 (V011): Medio + Seccion are temporal — history tables cannot be directly deleted.
-                new Respawn.Graph.Table("dbo", "Medio_History"),
-                new Respawn.Graph.Table("dbo", "Seccion_History"),
-                // ADM-008 (V013): PuntoDeVenta is temporal; SecuenciaComprobante is NOT temporal (AD8 revisitado).
-                new Respawn.Graph.Table("dbo", "PuntoDeVenta_History"),
-                // ADM-009 (V014): TipoDeIva + IngresosBrutos son temporales.
-                new Respawn.Graph.Table("dbo", "TipoDeIva_History"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos_History"),
-                new Respawn.Graph.Table("dbo", "TipoDeIva"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos"),
-            ]
-        });
-
-        await _respawner.ResetAsync(_connection);
-        await SeedRolCanonicalAsync();
+        await _db.ResetAndSeedAsync();
         await SeedTestUserAsync();
 
-        _testUserId = await _connection.QuerySingleAsync<int>(
+        _testUserId = await _db.Connection.QuerySingleAsync<int>(
             "SELECT Id FROM dbo.Usuario WHERE Username = 'test_rt_user'");
 
-        var factory = new SqlConnectionFactory(ConnectionString);
+        var factory = new SqlConnectionFactory(TestConnectionStrings.AppTestDb);
         _repository = new RefreshTokenRepository(factory);
     }
 
-    public async Task DisposeAsync()
-    {
-        await _respawner.ResetAsync(_connection);
-        await _connection.CloseAsync();
-        await _connection.DisposeAsync();
-    }
-
-    private async Task SeedRolCanonicalAsync()
-    {
-        const string sql = """
-            SET QUOTED_IDENTIFIER ON;
-            MERGE dbo.Rol AS t
-            USING (VALUES
-                ('admin', N'Administrador', N'Supervisor total'),
-                ('cajero', N'Cajero', N'Mostrador contado'),
-                ('operador_ctacte', N'Operador Cta Cte', N'Cuenta corriente'),
-                ('picadora', N'Picadora/Correctora', N'Edición de textos'),
-                ('jefe_publicidad', N'Jefe de Publicidad', N'Supervisión de pauta'),
-                ('productor', N'Productor', N'Carga restringida'),
-                ('diagramacion', N'Diagramación/Taller', N'Solo lectura pauta'),
-                ('reportes', N'Reportes', N'Solo lectura reportes')
-            ) AS s (Codigo, Nombre, Descripcion)
-            ON t.Codigo = s.Codigo
-            WHEN NOT MATCHED BY TARGET THEN
-                INSERT (Codigo, Nombre, Descripcion, Activo)
-                VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
-            """;
-        await _connection.ExecuteAsync(sql);
-    }
+    public Task DisposeAsync() => Task.CompletedTask;
 
     private async Task SeedTestUserAsync()
     {
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             SET QUOTED_IDENTIFIER ON;
             IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = 'test_rt_user')
                 INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo)

tests/SIGCM2.Application.Tests/Infrastructure/TipoDeIvaRepositoryTests.cs

@@ -19,8 +19,7 @@ namespace SIGCM2.Application.Tests.Infrastructure;
 [Collection("Database")]
 public class TipoDeIvaRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private ITipoDeIvaRepository _repo = null!;

tests/SIGCM2.Application.Tests/Integration/PermisoRepositoryTests.cs

@@ -11,8 +11,7 @@ namespace SIGCM2.Application.Tests.Integration;
 [Collection("Database")]
 public class PermisoRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private PermisoRepository _repository = null!;

tests/SIGCM2.Application.Tests/Integration/RolPermisoRepositoryTests.cs

@@ -11,8 +11,7 @@ namespace SIGCM2.Application.Tests.Integration;
 [Collection("Database")]
 public class RolPermisoRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private RolPermisoRepository _repository = null!;

tests/SIGCM2.Application.Tests/Integration/RolRepositoryTests.cs

@@ -8,8 +8,7 @@ namespace SIGCM2.Application.Tests.Integration;
 [Collection("Database")]
 public class RolRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string ConnectionString = TestConnectionStrings.AppTestDb;
 
     private SqlConnection _connection = null!;
     private RolRepository _repository = null!;

tests/SIGCM2.Application.Tests/Integration/UsuarioRepositoryTests.cs

@@ -1,66 +1,29 @@
-using Microsoft.Data.SqlClient;
-using Respawn;
+using Dapper;
 using SIGCM2.Infrastructure.Persistence;
+using SIGCM2.TestSupport;
 
 namespace SIGCM2.Application.Tests.Integration;
 
 [Collection("Database")]
 public class UsuarioRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
-
-    private SqlConnection _connection = null!;
-    private Respawner _respawner = null!;
+    private readonly SqlTestFixture _db;
     private UsuarioRepository _repository = null!;
 
+    public UsuarioRepositoryTests(SqlTestFixture db)
+    {
+        _db = db;
+    }
+
     public async Task InitializeAsync()
     {
-        _connection = new SqlConnection(ConnectionString);
-        await _connection.OpenAsync();
+        await _db.ResetAndSeedAsync();
 
-        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
-        {
-            DbAdapter = DbAdapter.SqlServer,
-            // Rol is a lookup table seeded by migration V003 — never wipe or Usuario FK breaks.
-            TablesToIgnore =
-            [
-                new Respawn.Graph.Table("dbo", "Rol"),
-                new Respawn.Graph.Table("dbo", "Permiso"),
-                new Respawn.Graph.Table("dbo", "RolPermiso"),
-                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
-                new Respawn.Graph.Table("dbo", "Usuario_History"),
-                new Respawn.Graph.Table("dbo", "Rol_History"),
-                new Respawn.Graph.Table("dbo", "Permiso_History"),
-                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
-                // ADM-001 (V011): Medio + Seccion are temporal — history tables cannot be directly deleted.
-                new Respawn.Graph.Table("dbo", "Medio_History"),
-                new Respawn.Graph.Table("dbo", "Seccion_History"),
-                // ADM-008 (V013): PuntoDeVenta is temporal; SecuenciaComprobante is NOT temporal (AD8 revisitado).
-                new Respawn.Graph.Table("dbo", "PuntoDeVenta_History"),
-                // ADM-009 (V014): TipoDeIva + IngresosBrutos son temporales.
-                new Respawn.Graph.Table("dbo", "TipoDeIva_History"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos_History"),
-                new Respawn.Graph.Table("dbo", "TipoDeIva"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos"),
-            ]
-        });
-
-        // Reset DB, re-seed Rol canonical table (lookup) and admin user for each test class run.
-        await _respawner.ResetAsync(_connection);
-        await SeedRolCanonicalAsync();
-        await SeedAdminAsync();
-
-        var factory = new SqlConnectionFactory(ConnectionString);
+        var factory = new SqlConnectionFactory(TestConnectionStrings.AppTestDb);
         _repository = new UsuarioRepository(factory);
     }
 
-    public async Task DisposeAsync()
-    {
-        await _respawner.ResetAsync(_connection);
-        await _connection.CloseAsync();
-        await _connection.DisposeAsync();
-    }
+    public Task DisposeAsync() => Task.CompletedTask;
 
     // Scenario: GetByUsername returns correct entity when user exists
     [Fact]
@@ -88,7 +51,7 @@ public class UsuarioRepositoryTests : IAsyncLifetime
     public async Task GetByUsernameAsync_DifferentUser_ReturnsCorrectUser_Cajero()
     {
         // Insert a second user with canonical rol 'cajero' (post-UDT-004 FK requires Rol.Codigo to exist).
-        await _connection.ExecuteAsync(
+        await _db.Connection.ExecuteAsync(
             "INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson) " +
             "VALUES ('cajero1', '$2a$12$hash2', 'Juan', 'Pérez', 'cajero', '[]')");
 
@@ -101,48 +64,4 @@ public class UsuarioRepositoryTests : IAsyncLifetime
         Assert.Equal("admin", admin.Rol);
         Assert.Equal("cajero", cajero.Rol);
     }
-
-    private async Task SeedRolCanonicalAsync()
-    {
-        const string sql = """
-            SET QUOTED_IDENTIFIER ON;
-            MERGE dbo.Rol AS t
-            USING (VALUES
-                ('admin', N'Administrador', N'Supervisor total'),
-                ('cajero', N'Cajero', N'Mostrador contado'),
-                ('operador_ctacte', N'Operador Cta Cte', N'Cuenta corriente'),
-                ('picadora', N'Picadora/Correctora', N'Edición de textos'),
-                ('jefe_publicidad', N'Jefe de Publicidad', N'Supervisión de pauta'),
-                ('productor', N'Productor', N'Carga restringida'),
-                ('diagramacion', N'Diagramación/Taller', N'Solo lectura pauta'),
-                ('reportes', N'Reportes', N'Solo lectura reportes')
-            ) AS s (Codigo, Nombre, Descripcion)
-            ON t.Codigo = s.Codigo
-            WHEN NOT MATCHED BY TARGET THEN
-                INSERT (Codigo, Nombre, Descripcion, Activo)
-                VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
-            """;
-        await _connection.ExecuteAsync(sql);
-    }
-
-    private async Task SeedAdminAsync()
-    {
-        await _connection.ExecuteAsync(
-            "SET QUOTED_IDENTIFIER ON; " +
-            "IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = 'admin') " +
-            "INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo) " +
-            "VALUES ('admin', '$2a$12$rmq6tlSAQ8WXhR2CwLCSeuwCJKz/.8Eab95UQCUNfwe4dokeOqMcW', " +
-            "'Administrador', 'Sistema', 'admin', '[\"*\"]', 1)");
-    }
-}
-
-// Dapper extension helper for IDbConnection
-file static class DapperHelper
-{
-    public static async Task ExecuteAsync(this SqlConnection conn, string sql)
-    {
-        using var cmd = conn.CreateCommand();
-        cmd.CommandText = sql;
-        await cmd.ExecuteNonQueryAsync();
-    }
 }

tests/SIGCM2.Application.Tests/Integration/UsuarioRepository_PermisosTests.cs

@@ -1,84 +1,46 @@
 using Dapper;
-using Microsoft.Data.SqlClient;
-using Respawn;
 using SIGCM2.Infrastructure.Persistence;
+using SIGCM2.TestSupport;
 
 namespace SIGCM2.Application.Tests.Integration;
 
 /// <summary>
 /// Integration tests for IUsuarioRepository.UpdatePermisosJsonAsync (UDT-009).
-/// Uses SIGCM2_Test database directly.
+/// Uses SIGCM2_Test_App database via shared SqlTestFixture.
 /// </summary>
 [Collection("Database")]
 public sealed class UsuarioRepository_PermisosTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
-
-    private SqlConnection _connection = null!;
-    private Respawner _respawner = null!;
+    private readonly SqlTestFixture _db;
     private UsuarioRepository _repository = null!;
 
+    public UsuarioRepository_PermisosTests(SqlTestFixture db)
+    {
+        _db = db;
+    }
+
     public async Task InitializeAsync()
     {
-        _connection = new SqlConnection(ConnectionString);
-        await _connection.OpenAsync();
+        await _db.ResetAndSeedAsync();
 
-        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
-        {
-            DbAdapter = DbAdapter.SqlServer,
-            TablesToIgnore =
-            [
-                new Respawn.Graph.Table("dbo", "Rol"),
-                new Respawn.Graph.Table("dbo", "Permiso"),
-                new Respawn.Graph.Table("dbo", "RolPermiso"),
-                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
-                new Respawn.Graph.Table("dbo", "Usuario_History"),
-                new Respawn.Graph.Table("dbo", "Rol_History"),
-                new Respawn.Graph.Table("dbo", "Permiso_History"),
-                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
-                // ADM-001 (V011): Medio + Seccion are temporal — history tables cannot be directly deleted.
-                new Respawn.Graph.Table("dbo", "Medio_History"),
-                new Respawn.Graph.Table("dbo", "Seccion_History"),
-                // ADM-008 (V013): PuntoDeVenta is temporal; SecuenciaComprobante is NOT temporal (AD8 revisitado).
-                new Respawn.Graph.Table("dbo", "PuntoDeVenta_History"),
-                // ADM-009 (V014): TipoDeIva + IngresosBrutos son temporales.
-                new Respawn.Graph.Table("dbo", "TipoDeIva_History"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos_History"),
-                new Respawn.Graph.Table("dbo", "TipoDeIva"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos"),
-            ]
-        });
-
-        await _respawner.ResetAsync(_connection);
-        await SeedRolCanonicalAsync();
-
-        var factory = new SqlConnectionFactory(ConnectionString);
+        var factory = new SqlConnectionFactory(TestConnectionStrings.AppTestDb);
         _repository = new UsuarioRepository(factory);
 
         // Seed a test user
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo, MustChangePassword)
             VALUES ('testuser', '$2a$12$hash', 'Test', 'User', 'cajero', '{"grant":[],"deny":[]}', 1, 0)
             """);
     }
 
-    public async Task DisposeAsync()
-    {
-        if (_connection is not null)
-        {
-            await _respawner.ResetAsync(_connection);
-            await _connection.CloseAsync();
-            await _connection.DisposeAsync();
-        }
-    }
+    public Task DisposeAsync() => Task.CompletedTask;
 
     // UPJ-01: UpdatePermisosJsonAsync persists PermisosJson and FechaModificacion
     [Fact]
     public async Task UpdatePermisosJsonAsync_PersistsJsonAndFechaModificacion()
     {
         // Arrange
-        var userId = await _connection.QuerySingleAsync<int>(
+        var userId = await _db.Connection.QuerySingleAsync<int>(
             "SELECT Id FROM dbo.Usuario WHERE Username = 'testuser'");
         var newJson = """{"grant":["textos:editar"],"deny":[]}""";
         var fechaMod = DateTime.UtcNow;
@@ -87,7 +49,7 @@ public sealed class UsuarioRepository_PermisosTests : IAsyncLifetime
         await _repository.UpdatePermisosJsonAsync(userId, newJson, fechaMod);
 
         // Assert
-        var row = await _connection.QuerySingleAsync<(string PermisosJson, DateTime? FechaModificacion)>(
+        var row = await _db.Connection.QuerySingleAsync<(string PermisosJson, DateTime? FechaModificacion)>(
             "SELECT PermisosJson, FechaModificacion FROM dbo.Usuario WHERE Id = @Id",
             new { Id = userId });
 
@@ -112,7 +74,7 @@ public sealed class UsuarioRepository_PermisosTests : IAsyncLifetime
     public async Task UpdatePermisosJsonAsync_GetByIdReflectsChange()
     {
         // Arrange
-        var userId = await _connection.QuerySingleAsync<int>(
+        var userId = await _db.Connection.QuerySingleAsync<int>(
             "SELECT Id FROM dbo.Usuario WHERE Username = 'testuser'");
         var newJson = """{"grant":["pauta:azanu:ver"],"deny":["ventas:contado:cobrar"]}""";
 
@@ -125,22 +87,4 @@ public sealed class UsuarioRepository_PermisosTests : IAsyncLifetime
         Assert.NotNull(usuario);
         Assert.Equal(newJson, usuario!.PermisosJson);
     }
-
-    // ── helpers ───────────────────────────────────────────────────────────────
-
-    private async Task SeedRolCanonicalAsync()
-    {
-        await _connection.ExecuteAsync("""
-            SET QUOTED_IDENTIFIER ON;
-            MERGE dbo.Rol AS t
-            USING (VALUES
-                ('admin', N'Administrador', N'Supervisor total'),
-                ('cajero', N'Cajero', N'Mostrador contado')
-            ) AS s (Codigo, Nombre, Descripcion)
-            ON t.Codigo = s.Codigo
-            WHEN NOT MATCHED BY TARGET THEN
-                INSERT (Codigo, Nombre, Descripcion, Activo)
-                VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
-            """);
-    }
 }

tests/SIGCM2.Application.Tests/Integration/V009MigrationTests.cs

@@ -1,66 +1,29 @@
 using Dapper;
-using Microsoft.Data.SqlClient;
-using Respawn;
+using SIGCM2.TestSupport;
 
 namespace SIGCM2.Application.Tests.Integration;
 
 /// <summary>
 /// SUITE-B-MIGRATION-V009 — M-01 a M-07 (UDT-009)
 /// Validates the V009 migration SQL and SqlTestFixture.EnsureV009SchemaAsync.
-/// Uses SIGCM2_Test database directly.
+/// Uses SIGCM2_Test_App database via shared SqlTestFixture.
 /// </summary>
 [Collection("Database")]
 public sealed class V009MigrationTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private readonly SqlTestFixture _db;
 
-    private SqlConnection _connection = null!;
-    private Respawner _respawner = null!;
+    public V009MigrationTests(SqlTestFixture db)
+    {
+        _db = db;
+    }
 
     public async Task InitializeAsync()
     {
-        _connection = new SqlConnection(ConnectionString);
-        await _connection.OpenAsync();
-
-        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
-        {
-            DbAdapter = DbAdapter.SqlServer,
-            TablesToIgnore =
-            [
-                new Respawn.Graph.Table("dbo", "Rol"),
-                new Respawn.Graph.Table("dbo", "Permiso"),
-                new Respawn.Graph.Table("dbo", "RolPermiso"),
-                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
-                new Respawn.Graph.Table("dbo", "Usuario_History"),
-                new Respawn.Graph.Table("dbo", "Rol_History"),
-                new Respawn.Graph.Table("dbo", "Permiso_History"),
-                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
-                // ADM-001 (V011): Medio + Seccion are temporal — history tables cannot be directly deleted.
-                new Respawn.Graph.Table("dbo", "Medio_History"),
-                new Respawn.Graph.Table("dbo", "Seccion_History"),
-                // ADM-008 (V013): PuntoDeVenta is temporal; SecuenciaComprobante is NOT temporal (AD8 revisitado).
-                new Respawn.Graph.Table("dbo", "PuntoDeVenta_History"),
-                // ADM-009 (V014): TipoDeIva + IngresosBrutos son temporales.
-                new Respawn.Graph.Table("dbo", "TipoDeIva_History"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos_History"),
-                new Respawn.Graph.Table("dbo", "TipoDeIva"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos"),
-            ]
-        });
-
-        await _respawner.ResetAsync(_connection);
-        await SeedRolAsync();
+        await _db.ResetAndSeedAsync();
     }
 
-    public async Task DisposeAsync()
-    {
-        if (_connection is not null)
-        {
-            await _connection.CloseAsync();
-            await _connection.DisposeAsync();
-        }
-    }
+    public Task DisposeAsync() => Task.CompletedTask;
 
     // M-01: migration file exists on filesystem
     [Fact]
@@ -110,7 +73,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
               AND name = 'PermisosJson'
             """;
 
-        var definition = await _connection.QuerySingleOrDefaultAsync<string>(sql);
+        var definition = await _db.Connection.QuerySingleOrDefaultAsync<string>(sql);
 
         Assert.NotNull(definition);
         Assert.Contains(@"{""grant"":[]", definition);
@@ -123,7 +86,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
     {
         await EnsureV009SchemaAsync();
 
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo, MustChangePassword)
             VALUES ('legacyempty', '$2a$12$hash', 'L', 'E', 'admin', '[]', 1, 0)
             """);
@@ -131,7 +94,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
         // Run migration again to migrate the newly inserted row
         await EnsureV009SchemaAsync();
 
-        var permisosJson = await _connection.QuerySingleAsync<string>(
+        var permisosJson = await _db.Connection.QuerySingleAsync<string>(
             "SELECT PermisosJson FROM dbo.Usuario WHERE Username = 'legacyempty'");
 
         Assert.Equal("""{"grant":[],"deny":[]}""", permisosJson);
@@ -143,14 +106,14 @@ public sealed class V009MigrationTests : IAsyncLifetime
     {
         await EnsureV009SchemaAsync();
 
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo, MustChangePassword)
             VALUES ('legacywild', '$2a$12$hash', 'L', 'W', 'admin', '["*"]', 1, 0)
             """);
 
         await EnsureV009SchemaAsync();
 
-        var permisosJson = await _connection.QuerySingleAsync<string>(
+        var permisosJson = await _db.Connection.QuerySingleAsync<string>(
             "SELECT PermisosJson FROM dbo.Usuario WHERE Username = 'legacywild'");
 
         Assert.Equal("""{"grant":[],"deny":[]}""", permisosJson);
@@ -166,7 +129,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
         await EnsureV009SchemaAsync();
 
         // Temporarily drop and re-add without the DEFAULT so we can insert ''
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             IF EXISTS (
                 SELECT 1 FROM sys.default_constraints
                 WHERE name = 'DF_Usuario_Permisos'
@@ -175,7 +138,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
                 ALTER TABLE dbo.Usuario DROP CONSTRAINT DF_Usuario_Permisos;
             """);
 
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo, MustChangePassword)
             VALUES ('emptystruser', '$2a$12$hash', 'E', 'S', 'admin', '', 1, 0)
             """);
@@ -183,7 +146,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
         // Re-apply V009 (which restores constraint and migrates '' rows)
         await EnsureV009SchemaAsync();
 
-        var permisosJson = await _connection.QuerySingleAsync<string>(
+        var permisosJson = await _db.Connection.QuerySingleAsync<string>(
             "SELECT PermisosJson FROM dbo.Usuario WHERE Username = 'emptystruser'");
 
         Assert.Equal("""{"grant":[],"deny":[]}""", permisosJson);
@@ -196,7 +159,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
         await EnsureV009SchemaAsync();
 
         // Seed admin as TestFixture does post-V009
-        await _connection.ExecuteAsync("""
+        await _db.Connection.ExecuteAsync("""
             IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = 'admin')
             INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo, MustChangePassword)
             VALUES (
@@ -206,7 +169,7 @@ public sealed class V009MigrationTests : IAsyncLifetime
             )
             """);
 
-        var permisosJson = await _connection.QuerySingleAsync<string>(
+        var permisosJson = await _db.Connection.QuerySingleAsync<string>(
             "SELECT PermisosJson FROM dbo.Usuario WHERE Username = 'admin'");
 
         Assert.Equal("""{"grant":[],"deny":[]}""", permisosJson);
@@ -214,19 +177,6 @@ public sealed class V009MigrationTests : IAsyncLifetime
 
     // ── helpers ───────────────────────────────────────────────────────────────
 
-    private async Task SeedRolAsync()
-    {
-        await _connection.ExecuteAsync("""
-            SET QUOTED_IDENTIFIER ON;
-            MERGE dbo.Rol AS t
-            USING (VALUES ('admin', N'Administrador', N'Supervisor total'))
-            AS s (Codigo, Nombre, Descripcion)
-            ON t.Codigo = s.Codigo
-            WHEN NOT MATCHED BY TARGET THEN
-                INSERT (Codigo, Nombre, Descripcion, Activo) VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
-            """);
-    }
-
     /// <summary>
     /// Replicates V009 migration idempotently — mirrors SqlTestFixture.EnsureV009SchemaAsync.
     /// </summary>
@@ -264,8 +214,8 @@ public sealed class V009MigrationTests : IAsyncLifetime
                OR LTRIM(RTRIM(PermisosJson)) = ''
             """;
 
-        await _connection.ExecuteAsync(dropConstraint);
-        await _connection.ExecuteAsync(addConstraint);
-        await _connection.ExecuteAsync(migrateRows);
+        await _db.Connection.ExecuteAsync(dropConstraint);
+        await _db.Connection.ExecuteAsync(addConstraint);
+        await _db.Connection.ExecuteAsync(migrateRows);
     }
 }

tests/SIGCM2.Application.Tests/Medios/MedioRepositoryTests.cs

@@ -1,69 +1,35 @@
 using Dapper;
-using Microsoft.Data.SqlClient;
-using Respawn;
 using SIGCM2.Domain.Entities;
 using SIGCM2.Infrastructure.Persistence;
+using SIGCM2.TestSupport;
 
 namespace SIGCM2.Application.Tests.Medios;
 
 /// <summary>
-/// Integration tests for MedioRepository against SIGCM2_Test.
+/// Integration tests for MedioRepository against SIGCM2_Test_App.
 /// TDD: RED written before implementation, GREEN after MedioRepository was created.
 /// Temporal: after UpdateAsync, dbo.Medio_History MUST have ≥1 row for that Id.
 /// </summary>
 [Collection("Database")]
 public class MedioRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
-
-    private SqlConnection _connection = null!;
-    private Respawner _respawner = null!;
+    private readonly SqlTestFixture _db;
     private MedioRepository _repository = null!;
 
+    public MedioRepositoryTests(SqlTestFixture db)
+    {
+        _db = db;
+    }
+
     public async Task InitializeAsync()
     {
-        _connection = new SqlConnection(ConnectionString);
-        await _connection.OpenAsync();
+        await _db.ResetAndSeedAsync();
 
-        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
-        {
-            DbAdapter = DbAdapter.SqlServer,
-            TablesToIgnore =
-            [
-                new Respawn.Graph.Table("dbo", "Rol"),
-                new Respawn.Graph.Table("dbo", "Permiso"),
-                new Respawn.Graph.Table("dbo", "RolPermiso"),
-                // *_History tables are system-versioned — engine rejects direct DELETE.
-                new Respawn.Graph.Table("dbo", "Usuario_History"),
-                new Respawn.Graph.Table("dbo", "Rol_History"),
-                new Respawn.Graph.Table("dbo", "Permiso_History"),
-                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
-                // ADM-001 (V011): Medio + Seccion are temporal — history tables cannot be directly deleted.
-                new Respawn.Graph.Table("dbo", "Medio_History"),
-                new Respawn.Graph.Table("dbo", "Seccion_History"),
-                // ADM-008 (V013): PuntoDeVenta is temporal; SecuenciaComprobante is NOT temporal (AD8 revisitado).
-                new Respawn.Graph.Table("dbo", "PuntoDeVenta_History"),
-                // ADM-009 (V014): TipoDeIva + IngresosBrutos son temporales.
-                new Respawn.Graph.Table("dbo", "TipoDeIva_History"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos_History"),
-                new Respawn.Graph.Table("dbo", "TipoDeIva"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos"),
-            ]
-        });
-
-        await _respawner.ResetAsync(_connection);
-        await SeedRolCanonicalAsync();
-
-        var factory = new SqlConnectionFactory(ConnectionString);
+        var factory = new SqlConnectionFactory(TestConnectionStrings.AppTestDb);
         _repository = new MedioRepository(factory);
     }
 
-    public async Task DisposeAsync()
-    {
-        await _connection.CloseAsync();
-        await _connection.DisposeAsync();
-    }
+    public Task DisposeAsync() => Task.CompletedTask;
 
     // ── AddAsync + GetByIdAsync roundtrip ─────────────────────────────────────
 
@@ -170,7 +136,7 @@ public class MedioRepositoryTests : IAsyncLifetime
         var updated = original!.WithUpdatedProfile("Historial v2", TipoMedio.Web, null, DateTime.UtcNow);
         await _repository.UpdateAsync(updated);
 
-        var historyCount = await _connection.ExecuteScalarAsync<int>(
+        var historyCount = await _db.Connection.ExecuteScalarAsync<int>(
             "SELECT COUNT(*) FROM dbo.Medio_History WHERE Id = @Id", new { Id = id });
 
         Assert.True(historyCount >= 1, $"Expected ≥1 history row for Medio Id={id}, got {historyCount}");
@@ -241,29 +207,4 @@ public class MedioRepositoryTests : IAsyncLifetime
         Assert.Equal(3, result.Total);
         Assert.Equal(2, result.Items.Count);
     }
-
-    // ── helpers ───────────────────────────────────────────────────────────────
-
-    private async Task SeedRolCanonicalAsync()
-    {
-        const string sql = """
-            SET QUOTED_IDENTIFIER ON;
-            MERGE dbo.Rol AS t
-            USING (VALUES
-                ('admin', N'Administrador', N'Supervisor total'),
-                ('cajero', N'Cajero', N'Mostrador contado'),
-                ('operador_ctacte', N'Operador Cta Cte', N'Cuenta corriente'),
-                ('picadora', N'Picadora/Correctora', N'Edición de textos'),
-                ('jefe_publicidad', N'Jefe de Publicidad', N'Supervisión de pauta'),
-                ('productor', N'Productor', N'Carga restringida'),
-                ('diagramacion', N'Diagramación/Taller', N'Solo lectura pauta'),
-                ('reportes', N'Reportes', N'Solo lectura reportes')
-            ) AS s (Codigo, Nombre, Descripcion)
-            ON t.Codigo = s.Codigo
-            WHEN NOT MATCHED BY TARGET THEN
-                INSERT (Codigo, Nombre, Descripcion, Activo)
-                VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
-            """;
-        await _connection.ExecuteAsync(sql);
-    }
 }

tests/SIGCM2.Application.Tests/SIGCM2.Application.Tests.csproj

@@ -24,10 +24,12 @@
     <ProjectReference Include="..\..\src\api\SIGCM2.Application\SIGCM2.Application.csproj" />
     <ProjectReference Include="..\..\src\api\SIGCM2.Infrastructure\SIGCM2.Infrastructure.csproj" />
     <ProjectReference Include="..\..\src\api\SIGCM2.Domain\SIGCM2.Domain.csproj" />
+    <ProjectReference Include="..\SIGCM2.TestSupport\SIGCM2.TestSupport.csproj" />
   </ItemGroup>
 
   <ItemGroup>
     <Using Include="Xunit" />
+    <Using Include="SIGCM2.TestSupport" />
   </ItemGroup>
 
 </Project>

tests/SIGCM2.Application.Tests/Secciones/SeccionRepositoryTests.cs

@@ -1,62 +1,33 @@
 using Dapper;
-using Microsoft.Data.SqlClient;
-using Respawn;
 using SIGCM2.Domain.Entities;
 using SIGCM2.Infrastructure.Persistence;
+using SIGCM2.TestSupport;
 
 namespace SIGCM2.Application.Tests.Secciones;
 
 /// <summary>
-/// Integration tests for SeccionRepository against SIGCM2_Test.
+/// Integration tests for SeccionRepository against SIGCM2_Test_App.
 /// TDD: RED written before implementation, GREEN after SeccionRepository was created.
 /// Temporal: after UpdateAsync, dbo.Seccion_History MUST have ≥1 row for that Id.
 /// </summary>
 [Collection("Database")]
 public class SeccionRepositoryTests : IAsyncLifetime
 {
-    private const string ConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
-
-    private SqlConnection _connection = null!;
-    private Respawner _respawner = null!;
+    private readonly SqlTestFixture _db;
     private SeccionRepository _repository = null!;
     private MedioRepository _medioRepository = null!;
     private int _medioId;
 
+    public SeccionRepositoryTests(SqlTestFixture db)
+    {
+        _db = db;
+    }
+
     public async Task InitializeAsync()
     {
-        _connection = new SqlConnection(ConnectionString);
-        await _connection.OpenAsync();
+        await _db.ResetAndSeedAsync();
 
-        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
-        {
-            DbAdapter = DbAdapter.SqlServer,
-            TablesToIgnore =
-            [
-                new Respawn.Graph.Table("dbo", "Rol"),
-                new Respawn.Graph.Table("dbo", "Permiso"),
-                new Respawn.Graph.Table("dbo", "RolPermiso"),
-                // *_History tables are system-versioned — engine rejects direct DELETE.
-                new Respawn.Graph.Table("dbo", "Usuario_History"),
-                new Respawn.Graph.Table("dbo", "Rol_History"),
-                new Respawn.Graph.Table("dbo", "Permiso_History"),
-                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
-                // ADM-001 (V011): Medio + Seccion are temporal — history tables cannot be directly deleted.
-                new Respawn.Graph.Table("dbo", "Medio_History"),
-                new Respawn.Graph.Table("dbo", "Seccion_History"),
-                new Respawn.Graph.Table("dbo", "PuntoDeVenta_History"),
-                // ADM-009 (V014): TipoDeIva + IngresosBrutos son temporales.
-                new Respawn.Graph.Table("dbo", "TipoDeIva_History"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos_History"),
-                new Respawn.Graph.Table("dbo", "TipoDeIva"),
-                new Respawn.Graph.Table("dbo", "IngresosBrutos"),
-            ]
-        });
-
-        await _respawner.ResetAsync(_connection);
-        await SeedRolCanonicalAsync();
-
-        var factory = new SqlConnectionFactory(ConnectionString);
+        var factory = new SqlConnectionFactory(TestConnectionStrings.AppTestDb);
         _repository = new SeccionRepository(factory);
         _medioRepository = new MedioRepository(factory);
 
@@ -64,11 +35,7 @@ public class SeccionRepositoryTests : IAsyncLifetime
         _medioId = await _medioRepository.AddAsync(Medio.ForCreation("TESTMEDIO", "Medio de Prueba", TipoMedio.Diario, null));
     }
 
-    public async Task DisposeAsync()
-    {
-        await _connection.CloseAsync();
-        await _connection.DisposeAsync();
-    }
+    public Task DisposeAsync() => Task.CompletedTask;
 
     // ── AddAsync + GetByIdAsync roundtrip ─────────────────────────────────────
 
@@ -171,7 +138,7 @@ public class SeccionRepositoryTests : IAsyncLifetime
         var updated = original!.WithUpdatedProfile("Historial v2", "suplementos", DateTime.UtcNow);
         await _repository.UpdateAsync(updated);
 
-        var historyCount = await _connection.ExecuteScalarAsync<int>(
+        var historyCount = await _db.Connection.ExecuteScalarAsync<int>(
             "SELECT COUNT(*) FROM dbo.Seccion_History WHERE Id = @Id", new { Id = id });
 
         Assert.True(historyCount >= 1, $"Expected ≥1 history row for Seccion Id={id}, got {historyCount}");
@@ -234,29 +201,4 @@ public class SeccionRepositoryTests : IAsyncLifetime
         Assert.Equal(3, result.Total);
         Assert.Equal(2, result.Items.Count);
     }
-
-    // ── helpers ───────────────────────────────────────────────────────────────
-
-    private async Task SeedRolCanonicalAsync()
-    {
-        const string sql = """
-            SET QUOTED_IDENTIFIER ON;
-            MERGE dbo.Rol AS t
-            USING (VALUES
-                ('admin', N'Administrador', N'Supervisor total'),
-                ('cajero', N'Cajero', N'Mostrador contado'),
-                ('operador_ctacte', N'Operador Cta Cte', N'Cuenta corriente'),
-                ('picadora', N'Picadora/Correctora', N'Edición de textos'),
-                ('jefe_publicidad', N'Jefe de Publicidad', N'Supervisión de pauta'),
-                ('productor', N'Productor', N'Carga restringida'),
-                ('diagramacion', N'Diagramación/Taller', N'Solo lectura pauta'),
-                ('reportes', N'Reportes', N'Solo lectura reportes')
-            ) AS s (Codigo, Nombre, Descripcion)
-            ON t.Codigo = s.Codigo
-            WHEN NOT MATCHED BY TARGET THEN
-                INSERT (Codigo, Nombre, Descripcion, Activo)
-                VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
-            """;
-        await _connection.ExecuteAsync(sql);
-    }
 }

tests/SIGCM2.TestSupport/SqlTestFixture.cs

@@ -16,7 +16,14 @@ public sealed class SqlTestFixture : IAsyncLifetime
     private SqlConnection _connection = null!;
     private Respawner _respawner = null!;
 
-    public SqlTestFixture(string connectionString)
+    /// <summary>Parameterless ctor for xUnit ICollectionFixture — uses SIGCM2_Test_App.</summary>
+    public SqlTestFixture() : this(TestConnectionStrings.AppTestDb) { }
+
+    /// <summary>
+    /// Explicit connection string ctor — used by TestWebAppFactory (same assembly).
+    /// Internal to satisfy xUnit's "single public constructor" rule for ICollectionFixture.
+    /// </summary>
+    internal SqlTestFixture(string connectionString)
     {
         _connectionString = connectionString;
     }
@@ -80,6 +87,13 @@ public sealed class SqlTestFixture : IAsyncLifetime
         await ResetAndSeedAsync();
     }
 
+    /// <summary>
+    /// Exposes the open SqlConnection for tests that need to run ad-hoc queries
+    /// (e.g. seed extra rows, assert history tables). Connection is opened during
+    /// InitializeAsync and closed in DisposeAsync.
+    /// </summary>
+    public SqlConnection Connection => _connection;
+
     public async Task ResetAndSeedAsync()
     {
         await _respawner.ResetAsync(_connection);

tests/SIGCM2.TestSupport/TestConnectionStrings.cs

@@ -0,0 +1,20 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("SIGCM2.Api.Tests")]
+
+namespace SIGCM2.TestSupport;
+
+/// <summary>
+/// Centralized connection string constants for integration test databases.
+/// Single source of truth — change server/credentials here only.
+/// </summary>
+public static class TestConnectionStrings
+{
+    /// <summary>Used by SIGCM2.Application.Tests via SqlTestFixture (parameterless ctor).</summary>
+    public const string AppTestDb =
+        "Server=TECNICA3;Database=SIGCM2_Test_App;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+
+    /// <summary>Used by SIGCM2.Api.Tests via TestWebAppFactory.</summary>
+    public const string ApiTestDb =
+        "Server=TECNICA3;Database=SIGCM2_Test_Api;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+}

tests/SIGCM2.TestSupport/TestWebAppFactory.cs

@@ -13,12 +13,11 @@ namespace SIGCM2.TestSupport;
 
 /// <summary>
 /// WebApplicationFactory for integration tests against SIGCM2.Api.
-/// Uses SIGCM2_Test database (separate from production SIGCM2).
+/// Uses SIGCM2_Test_Api database (isolated from Application.Tests which uses SIGCM2_Test_App).
 /// </summary>
 public sealed class TestWebAppFactory : WebApplicationFactory<Program>, IAsyncLifetime
 {
-    private const string TestConnectionString =
-        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
+    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;
 
     // Resolved once — absolute paths independent of working directory
     private static readonly string RepoRoot = ResolveRepoRoot();