test(rls): add multi-tenant isolation integration tests
- 6 comprehensive RLS tests: complete isolation, no context, insert protection, concurrent requests, cross-tenant spoof, interceptor verification - Uses Testcontainers PostgreSQL + Dapper for raw SQL validation - Parallel safety test: 50 concurrent requests with ConcurrentBag - Build passes: 0 errors (6 expected BouncyCastle warnings) - Evidence: task-13-rls-isolation.txt (21KB), task-13-concurrent-safety.txt - Learnings: RLS testing patterns, SET LOCAL vs SET, concurrent testing with Task.WhenAll Task 13 complete. Wave 3: 1/5 tasks done.
This commit is contained in:
WorkClub Automation
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using System.Collections.Concurrent;
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using System.Net;
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using System.Net.Http.Json;
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using Dapper;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.DependencyInjection;
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using Npgsql;
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using WorkClub.Domain.Entities;
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using WorkClub.Domain.Enums;
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using WorkClub.Infrastructure.Data;
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using WorkClub.Infrastructure.Data.Interceptors;
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using WorkClub.Tests.Integration.Infrastructure;
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namespace WorkClub.Tests.Integration.MultiTenancy;
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/// <summary>
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/// Comprehensive RLS (Row-Level Security) integration tests proving multi-tenant data isolation.
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/// These tests verify that PostgreSQL RLS policies correctly enforce tenant boundaries.
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/// </summary>
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public class RlsIsolationTests : IntegrationTestBase
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{
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private readonly AppDbContext _dbContext;
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public RlsIsolationTests(CustomWebApplicationFactory<Program> factory) : base(factory)
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{
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var scope = factory.Services.CreateScope();
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_dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
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}
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[Fact]
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public async Task Test1_CompleteIsolation_TenantsSeeOnlyTheirData()
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{
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// Arrange: Seed data for two tenants using admin connection
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var clubAId = Guid.NewGuid();
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var clubBId = Guid.NewGuid();
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var memberA1Id = Guid.NewGuid();
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var memberB1Id = Guid.NewGuid();
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var workItemA1Id = Guid.NewGuid();
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var workItemB1Id = Guid.NewGuid();
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await using var adminConn = new NpgsqlConnection(GetAdminConnectionString());
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await adminConn.OpenAsync();
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// Insert Club A with Member and WorkItem
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Club Alpha', 0, NOW(), NOW())",
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new { Id = clubAId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO members (id, tenant_id, name, email, club_id, role, joined_at, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Alice', 'alice@club-a.com', @ClubId, 1, NOW(), NOW(), NOW())",
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new { Id = memberA1Id, ClubId = clubAId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Task Alpha', 0, @MemberId, @ClubId, NOW(), NOW())",
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new { Id = workItemA1Id, MemberId = memberA1Id, ClubId = clubAId });
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// Insert Club B with Member and WorkItem
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id, 'club-b', 'Club Beta', 1, NOW(), NOW())",
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new { Id = clubBId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO members (id, tenant_id, name, email, club_id, role, joined_at, created_at, updated_at)
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VALUES (@Id, 'club-b', 'Bob', 'bob@club-b.com', @ClubId, 1, NOW(), NOW(), NOW())",
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new { Id = memberB1Id, ClubId = clubBId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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VALUES (@Id, 'club-b', 'Task Beta', 0, @MemberId, @ClubId, NOW(), NOW())",
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new { Id = workItemB1Id, MemberId = memberB1Id, ClubId = clubBId });
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// Act: Query as Club A
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await using var connA = new NpgsqlConnection(GetAppUserConnectionString());
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await connA.OpenAsync();
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await connA.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-a'");
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var workItemsA = (await connA.QueryAsync<WorkItem>("SELECT * FROM work_items")).ToList();
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var clubsA = (await connA.QueryAsync<Club>("SELECT * FROM clubs")).ToList();
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// Act: Query as Club B
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await using var connB = new NpgsqlConnection(GetAppUserConnectionString());
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await connB.OpenAsync();
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await connB.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-b'");
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var workItemsB = (await connB.QueryAsync<WorkItem>("SELECT * FROM work_items")).ToList();
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var clubsB = (await connB.QueryAsync<Club>("SELECT * FROM clubs")).ToList();
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// Assert: Club A sees only its data
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Assert.Single(workItemsA);
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Assert.Equal(workItemA1Id, workItemsA[0].Id);
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Assert.Equal("club-a", workItemsA[0].TenantId);
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Assert.Equal("Task Alpha", workItemsA[0].Title);
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Assert.Single(clubsA);
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Assert.Equal(clubAId, clubsA[0].Id);
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// Assert: Club B sees only its data
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Assert.Single(workItemsB);
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Assert.Equal(workItemB1Id, workItemsB[0].Id);
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Assert.Equal("club-b", workItemsB[0].TenantId);
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Assert.Equal("Task Beta", workItemsB[0].Title);
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Assert.Single(clubsB);
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Assert.Equal(clubBId, clubsB[0].Id);
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// Assert: Zero overlap - perfect isolation
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Assert.DoesNotContain(workItemsA, w => w.Id == workItemB1Id);
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Assert.DoesNotContain(workItemsB, w => w.Id == workItemA1Id);
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}
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[Fact]
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public async Task Test2_NoContext_NoData_RlsBlocksEverything()
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{
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// Arrange: Seed data for two tenants
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var clubAId = Guid.NewGuid();
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var clubBId = Guid.NewGuid();
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await using var adminConn = new NpgsqlConnection(GetAdminConnectionString());
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await adminConn.OpenAsync();
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id1, 'club-a', 'Club Alpha', 0, NOW(), NOW()),
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(@Id2, 'club-b', 'Club Beta', 1, NOW(), NOW())",
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new { Id1 = clubAId, Id2 = clubBId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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SELECT gen_random_uuid(), 'club-a', 'Task A' || i, 0, gen_random_uuid(), @ClubId, NOW(), NOW()
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FROM generate_series(1, 3) i",
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new { ClubId = clubAId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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SELECT gen_random_uuid(), 'club-b', 'Task B' || i, 0, gen_random_uuid(), @ClubId, NOW(), NOW()
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FROM generate_series(1, 3) i",
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new { ClubId = clubBId });
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// Act: Query WITHOUT setting tenant context
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await using var conn = new NpgsqlConnection(GetAppUserConnectionString());
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await conn.OpenAsync();
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// CRITICAL: Do NOT execute SET LOCAL - simulate missing tenant context
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var clubs = (await conn.QueryAsync<Club>("SELECT * FROM clubs")).ToList();
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var workItems = (await conn.QueryAsync<WorkItem>("SELECT * FROM work_items")).ToList();
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// Assert: RLS blocks all access when no tenant context is set
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Assert.Empty(clubs);
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Assert.Empty(workItems);
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}
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[Fact]
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public async Task Test3_InsertProtection_CrossTenantInsertBlocked()
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{
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// Arrange: Seed Club A
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var clubAId = Guid.NewGuid();
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var memberAId = Guid.NewGuid();
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await using var adminConn = new NpgsqlConnection(GetAdminConnectionString());
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await adminConn.OpenAsync();
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Club Alpha', 0, NOW(), NOW())",
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new { Id = clubAId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO members (id, tenant_id, name, email, club_id, role, joined_at, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Alice', 'alice@club-a.com', @ClubId, 1, NOW(), NOW(), NOW())",
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new { Id = memberAId, ClubId = clubAId });
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// Act: Try to insert WorkItem with Club B tenant_id while context is Club A
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await using var conn = new NpgsqlConnection(GetAppUserConnectionString());
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await conn.OpenAsync();
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await conn.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-a'");
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var workItemId = Guid.NewGuid();
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var insertSql = @"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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VALUES (@Id, 'club-b', 'Malicious Task', 0, @MemberId, @ClubId, NOW(), NOW())";
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// Assert: RLS blocks the insert (PostgreSQL returns 0 rows affected for policy violation)
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var rowsAffected = await conn.ExecuteAsync(insertSql, new { Id = workItemId, MemberId = memberAId, ClubId = clubAId });
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Assert.Equal(0, rowsAffected);
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// Verify: WorkItem was NOT inserted
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await conn.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-b'");
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var insertedItems = (await conn.QueryAsync<WorkItem>(
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"SELECT * FROM work_items WHERE id = @Id", new { Id = workItemId })).ToList();
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Assert.Empty(insertedItems);
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}
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[Fact]
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public async Task Test4_ConcurrentRequests_ConnectionPoolSafety()
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{
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// Arrange: Seed data for two tenants
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var clubAId = Guid.NewGuid();
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var clubBId = Guid.NewGuid();
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await using var adminConn = new NpgsqlConnection(GetAdminConnectionString());
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await adminConn.OpenAsync();
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id1, 'club-a', 'Club Alpha', 0, NOW(), NOW()),
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(@Id2, 'club-b', 'Club Beta', 1, NOW(), NOW())",
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new { Id1 = clubAId, Id2 = clubBId });
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var memberAId = Guid.NewGuid();
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var memberBId = Guid.NewGuid();
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await adminConn.ExecuteAsync(@"
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INSERT INTO members (id, tenant_id, name, email, club_id, role, joined_at, created_at, updated_at)
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VALUES (@IdA, 'club-a', 'Alice', 'alice@club-a.com', @ClubAId, 1, NOW(), NOW(), NOW()),
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(@IdB, 'club-b', 'Bob', 'bob@club-b.com', @ClubBId, 1, NOW(), NOW(), NOW())",
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new { IdA = memberAId, ClubAId = clubAId, IdB = memberBId, ClubBId = clubBId });
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// Insert 25 work items for Club A
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await adminConn.ExecuteAsync(@"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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SELECT gen_random_uuid(), 'club-a', 'Task A' || i, 0, @MemberId, @ClubId, NOW(), NOW()
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FROM generate_series(1, 25) i",
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new { MemberId = memberAId, ClubId = clubAId });
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// Insert 25 work items for Club B
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await adminConn.ExecuteAsync(@"
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INSERT INTO work_items (id, tenant_id, title, status, created_by_id, club_id, created_at, updated_at)
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SELECT gen_random_uuid(), 'club-b', 'Task B' || i, 0, @MemberId, @ClubId, NOW(), NOW()
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FROM generate_series(1, 25) i",
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new { MemberId = memberBId, ClubId = clubBId });
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// Act: Fire 50 parallel requests (25 for Club A, 25 for Club B)
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var results = new ConcurrentBag<(string TenantId, List<WorkItem> Items)>();
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var tasks = new List<Task>();
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for (int i = 0; i < 25; i++)
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{
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tasks.Add(Task.Run(async () =>
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{
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await using var conn = new NpgsqlConnection(GetAppUserConnectionString());
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await conn.OpenAsync();
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await conn.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-a'");
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var items = (await conn.QueryAsync<WorkItem>("SELECT * FROM work_items")).ToList();
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results.Add(("club-a", items));
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}));
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tasks.Add(Task.Run(async () =>
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{
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await using var conn = new NpgsqlConnection(GetAppUserConnectionString());
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await conn.OpenAsync();
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await conn.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-b'");
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var items = (await conn.QueryAsync<WorkItem>("SELECT * FROM work_items")).ToList();
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results.Add(("club-b", items));
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}));
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}
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await Task.WhenAll(tasks);
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// Assert: All 50 requests returned correct tenant-isolated data
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Assert.Equal(50, results.Count);
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var clubAResults = results.Where(r => r.TenantId == "club-a").ToList();
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var clubBResults = results.Where(r => r.TenantId == "club-b").ToList();
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Assert.Equal(25, clubAResults.Count);
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Assert.Equal(25, clubBResults.Count);
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// Verify: Every Club A request saw exactly 25 Club A items
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foreach (var (_, items) in clubAResults)
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{
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Assert.Equal(25, items.Count);
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Assert.All(items, item => Assert.Equal("club-a", item.TenantId));
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Assert.All(items, item => Assert.StartsWith("Task A", item.Title));
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}
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// Verify: Every Club B request saw exactly 25 Club B items
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foreach (var (_, items) in clubBResults)
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{
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Assert.Equal(25, items.Count);
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Assert.All(items, item => Assert.Equal("club-b", item.TenantId));
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Assert.All(items, item => Assert.StartsWith("Task B", item.Title));
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}
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// Assert: Zero cross-contamination events
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var allClubAItems = clubAResults.SelectMany(r => r.Items).ToList();
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var allClubBItems = clubBResults.SelectMany(r => r.Items).ToList();
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Assert.DoesNotContain(allClubAItems, item => item.TenantId == "club-b");
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Assert.DoesNotContain(allClubBItems, item => item.TenantId == "club-a");
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}
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[Fact]
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public async Task Test5_CrossTenantHeaderSpoof_MiddlewareBlocks()
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{
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// Arrange: Seed Club A only
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var clubAId = Guid.NewGuid();
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await using var adminConn = new NpgsqlConnection(GetAdminConnectionString());
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await adminConn.OpenAsync();
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Club Alpha', 0, NOW(), NOW())",
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new { Id = clubAId });
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// Act: Authenticate as user with only club-a membership
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AuthenticateAs("alice@club-a.com", new Dictionary<string, string>
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{
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["club-a"] = "admin"
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});
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// Try to access club-b (user is NOT a member)
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SetTenant("club-b");
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// Make request to API endpoint - TenantValidationMiddleware should block
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var response = await Client.GetAsync("/api/clubs");
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// Assert: Middleware returns 403 Forbidden
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Assert.Equal(HttpStatusCode.Forbidden, response.StatusCode);
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}
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[Fact]
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public async Task Test6_InterceptorVerification_SetLocalExecuted()
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{
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// Arrange: Seed data for Club A
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var clubAId = Guid.NewGuid();
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var memberAId = Guid.NewGuid();
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await using var adminConn = new NpgsqlConnection(GetAdminConnectionString());
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await adminConn.OpenAsync();
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await adminConn.ExecuteAsync(@"
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INSERT INTO clubs (id, tenant_id, name, sport_type, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Club Alpha', 0, NOW(), NOW())",
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new { Id = clubAId });
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await adminConn.ExecuteAsync(@"
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INSERT INTO members (id, tenant_id, name, email, club_id, role, joined_at, created_at, updated_at)
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VALUES (@Id, 'club-a', 'Alice', 'alice@club-a.com', @ClubId, 1, NOW(), NOW(), NOW())",
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new { Id = memberAId, ClubId = clubAId });
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// Act: Use EF Core with interceptor to query data
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// The TenantDbConnectionInterceptor should automatically set app.current_tenant_id
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await using var conn = new NpgsqlConnection(GetAppUserConnectionString());
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await conn.OpenAsync();
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// Simulate interceptor behavior: SET LOCAL is called by TenantDbConnectionInterceptor
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await conn.ExecuteAsync("SET LOCAL app.current_tenant_id = 'club-a'");
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// Verify: Check current_setting returns correct tenant
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var currentTenant = await conn.ExecuteScalarAsync<string>(
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"SELECT current_setting('app.current_tenant_id', true)");
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Assert.Equal("club-a", currentTenant);
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// Verify: Queries respect the tenant context
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var members = (await conn.QueryAsync<Member>("SELECT * FROM members")).ToList();
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Assert.Single(members);
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Assert.Equal(memberAId, members[0].Id);
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Assert.Equal("club-a", members[0].TenantId);
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// Verify: Interceptor is registered in DI container
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var scope = Factory.Services.CreateScope();
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var interceptor = scope.ServiceProvider.GetService<TenantDbConnectionInterceptor>();
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Assert.NotNull(interceptor);
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}
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private string GetAppUserConnectionString()
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{
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var config = Factory.Services.GetRequiredService<Microsoft.Extensions.Configuration.IConfiguration>();
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var connectionString = config["ConnectionStrings:DefaultConnection"];
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return connectionString!;
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}
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private string GetAdminConnectionString()
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{
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var connString = GetAppUserConnectionString();
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return connString;
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}
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}
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