test(udt-001): backend unit and integration tests (30 tests)

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

@@ -0,0 +1,102 @@
+using Microsoft.Data.SqlClient;
+using Respawn;
+using SIGCM2.Infrastructure.Persistence;
+
+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 UsuarioRepository _repository = null!;
+
+    public async Task InitializeAsync()
+    {
+        _connection = new SqlConnection(ConnectionString);
+        await _connection.OpenAsync();
+
+        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
+        {
+            DbAdapter = DbAdapter.SqlServer
+        });
+
+        // Reset DB and seed admin user for each test class run
+        await _respawner.ResetAsync(_connection);
+        await SeedAdminAsync();
+
+        var factory = new SqlConnectionFactory(ConnectionString);
+        _repository = new UsuarioRepository(factory);
+    }
+
+    public async Task DisposeAsync()
+    {
+        await _respawner.ResetAsync(_connection);
+        await _connection.CloseAsync();
+        await _connection.DisposeAsync();
+    }
+
+    // Scenario: GetByUsername returns correct entity when user exists
+    [Fact]
+    public async Task GetByUsernameAsync_ExistingUser_ReturnsUsuario()
+    {
+        var usuario = await _repository.GetByUsernameAsync("admin");
+
+        Assert.NotNull(usuario);
+        Assert.Equal("admin", usuario.Username);
+        Assert.Equal("admin", usuario.Rol);
+        Assert.True(usuario.Activo);
+        Assert.False(string.IsNullOrWhiteSpace(usuario.PasswordHash));
+    }
+
+    // Triangulation: GetByUsername returns null when user does not exist
+    [Fact]
+    public async Task GetByUsernameAsync_NonExistentUser_ReturnsNull()
+    {
+        var usuario = await _repository.GetByUsernameAsync("noexiste");
+        Assert.Null(usuario);
+    }
+
+    // Triangulation: case-sensitive username lookup (SQL Server UNIQUE constraint is case-insensitive by default)
+    [Fact]
+    public async Task GetByUsernameAsync_DifferentUser_ReturnsCorrectUser()
+    {
+        // Insert a second user
+        await _connection.ExecuteAsync(
+            "INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson) " +
+            "VALUES ('vendedor1', '$2a$12$hash2', 'Juan', 'Pérez', 'vendedor', '[]')");
+
+        var admin = await _repository.GetByUsernameAsync("admin");
+        var vendedor = await _repository.GetByUsernameAsync("vendedor1");
+
+        Assert.NotNull(admin);
+        Assert.NotNull(vendedor);
+        Assert.NotEqual(admin.Id, vendedor.Id);
+        Assert.Equal("admin", admin.Rol);
+        Assert.Equal("vendedor", vendedor.Rol);
+    }
+
+    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();
+    }
+}