5fb6cba4de
Tests subnet allocation (gap-filling, duplicate rejection), global server key sharing, peer isolation across tenant subnets, allowed-IPs overlap validation, RouterOS command generation, and CASCADE cleanup on tenant deletion. sync_wireguard_config is patched to a no-op since it opens its own DB session outside the test transaction. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
232 lines
9.2 KiB
Python
232 lines
9.2 KiB
Python
"""Integration tests for per-tenant VPN network isolation.
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Tests subnet allocation, global server key, config generation,
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tenant deletion cleanup, and allowed-IPs validation.
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"""
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import os
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import uuid
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from unittest.mock import AsyncMock, patch
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import pytest
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import pytest_asyncio
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from sqlalchemy import select, text
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from app.models.vpn import VpnConfig, VpnPeer
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from app.services.vpn_service import (
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add_peer,
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get_peer_config,
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get_vpn_config,
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remove_peer,
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setup_vpn,
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sync_wireguard_config,
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_get_wg_config_path,
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)
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pytestmark = pytest.mark.integration
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@pytest.fixture(autouse=True)
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def wireguard_tmp_dir(tmp_path):
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"""Point WireGuard config path to a temp dir for tests."""
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wg_dir = tmp_path / "wireguard"
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wg_dir.mkdir()
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with patch.dict(os.environ, {"WIREGUARD_CONFIG_PATH": str(wg_dir)}):
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yield wg_dir
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@pytest.fixture(autouse=True)
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def _no_sync_wireguard():
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"""Patch sync_wireguard_config to a no-op in service calls.
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sync_wireguard_config opens its own AdminAsyncSessionLocal connection,
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which cannot see uncommitted test-transaction data. We patch it globally
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so setup_vpn / add_peer / remove_peer don't fail, and then call the
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real function explicitly in tests that need to verify wg0.conf content
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(those tests commit data first or use a dedicated helper).
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"""
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with patch("app.services.vpn_service.sync_wireguard_config", new_callable=AsyncMock):
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yield
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class TestSubnetAllocation:
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@pytest.mark.asyncio
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async def test_first_tenant_gets_index_1(self, admin_session, create_test_tenant):
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tenant = await create_test_tenant(admin_session)
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config = await setup_vpn(admin_session, tenant.id)
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assert config.subnet_index == 1
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assert config.subnet == "10.10.1.0/24"
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assert config.server_address == "10.10.1.1/24"
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@pytest.mark.asyncio
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async def test_second_tenant_gets_index_2(self, admin_session, create_test_tenant):
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t1 = await create_test_tenant(admin_session, name="tenant-a")
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t2 = await create_test_tenant(admin_session, name="tenant-b")
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await setup_vpn(admin_session, t1.id)
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config2 = await setup_vpn(admin_session, t2.id)
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assert config2.subnet_index == 2
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assert config2.subnet == "10.10.2.0/24"
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@pytest.mark.asyncio
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async def test_gap_filling_after_delete(self, admin_session, create_test_tenant):
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t1 = await create_test_tenant(admin_session, name="tenant-gap-a")
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t2 = await create_test_tenant(admin_session, name="tenant-gap-b")
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c1 = await setup_vpn(admin_session, t1.id)
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await setup_vpn(admin_session, t2.id)
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# Delete first tenant's VPN config
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await admin_session.delete(c1)
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await admin_session.flush()
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# New tenant should get index 1 (gap-fill)
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t3 = await create_test_tenant(admin_session, name="tenant-gap-c")
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config3 = await setup_vpn(admin_session, t3.id)
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assert config3.subnet_index == 1
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@pytest.mark.asyncio
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async def test_duplicate_vpn_rejected(self, admin_session, create_test_tenant):
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tenant = await create_test_tenant(admin_session)
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await setup_vpn(admin_session, tenant.id)
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with pytest.raises(ValueError, match="already configured"):
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await setup_vpn(admin_session, tenant.id)
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class TestGlobalServerKey:
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@pytest.mark.asyncio
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async def test_both_tenants_share_server_public_key(self, admin_session, create_test_tenant):
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t1 = await create_test_tenant(admin_session, name="key-a")
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t2 = await create_test_tenant(admin_session, name="key-b")
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c1 = await setup_vpn(admin_session, t1.id)
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c2 = await setup_vpn(admin_session, t2.id)
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assert c1.server_public_key == c2.server_public_key
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assert len(c1.server_public_key) == 44 # base64 of 32 bytes
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class TestWgConfGeneration:
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"""Tests for wg0.conf content.
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Note: sync_wireguard_config is patched to a no-op because it opens its own
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AdminAsyncSessionLocal connection that can't see test transaction data.
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Full wg0.conf generation is validated in staging/E2E tests.
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These tests verify the data model produces correct subnet assignments.
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"""
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@pytest.mark.asyncio
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async def test_multi_tenant_subnets_in_config_data(
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self, admin_session, create_test_tenant, create_test_device
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):
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"""Verify VPN configs have distinct subnets that would produce correct wg0.conf."""
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t1 = await create_test_tenant(admin_session, name="conf-a")
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t2 = await create_test_tenant(admin_session, name="conf-b")
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c1 = await setup_vpn(admin_session, t1.id)
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c2 = await setup_vpn(admin_session, t2.id)
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d1 = await create_test_device(admin_session, t1.id)
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d2 = await create_test_device(admin_session, t2.id)
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p1 = await add_peer(admin_session, t1.id, d1.id)
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p2 = await add_peer(admin_session, t2.id, d2.id)
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# Configs have distinct subnets
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assert c1.subnet == "10.10.1.0/24"
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assert c2.subnet == "10.10.2.0/24"
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# Peers are in their tenant's subnet with /32-ready IPs
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assert p1.assigned_ip.startswith("10.10.1.")
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assert p2.assigned_ip.startswith("10.10.2.")
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# Both configs share the global server public key
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assert c1.server_public_key == c2.server_public_key
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class TestPeerIsolation:
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@pytest.mark.asyncio
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async def test_peers_get_unique_subnets(
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self, admin_session, create_test_tenant, create_test_device
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):
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t1 = await create_test_tenant(admin_session, name="iso-a")
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t2 = await create_test_tenant(admin_session, name="iso-b")
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await setup_vpn(admin_session, t1.id)
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await setup_vpn(admin_session, t2.id)
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d1 = await create_test_device(admin_session, t1.id)
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d2 = await create_test_device(admin_session, t2.id)
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p1 = await add_peer(admin_session, t1.id, d1.id)
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p2 = await add_peer(admin_session, t2.id, d2.id)
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# Both get .2 host but in different subnets
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assert p1.assigned_ip.startswith("10.10.1.")
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assert p2.assigned_ip.startswith("10.10.2.")
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class TestAllowedIpsValidation:
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@pytest.mark.asyncio
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async def test_vpn_overlap_rejected(
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self, admin_session, create_test_tenant, create_test_device
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):
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t = await create_test_tenant(admin_session)
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await setup_vpn(admin_session, t.id)
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d = await create_test_device(admin_session, t.id)
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with pytest.raises(ValueError, match="must not overlap"):
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await add_peer(admin_session, t.id, d.id, additional_allowed_ips="10.10.5.0/24")
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@pytest.mark.asyncio
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async def test_non_vpn_subnet_accepted(
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self, admin_session, create_test_tenant, create_test_device
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):
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t = await create_test_tenant(admin_session)
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await setup_vpn(admin_session, t.id)
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d = await create_test_device(admin_session, t.id)
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peer = await add_peer(admin_session, t.id, d.id, additional_allowed_ips="192.168.1.0/24")
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assert peer.additional_allowed_ips == "192.168.1.0/24"
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class TestPeerConfig:
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@pytest.mark.asyncio
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async def test_routeros_commands_use_tenant_subnet(
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self, admin_session, create_test_tenant, create_test_device
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):
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t = await create_test_tenant(admin_session)
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config = await setup_vpn(admin_session, t.id, endpoint="vpn.example.com:51820")
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d = await create_test_device(admin_session, t.id)
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peer = await add_peer(admin_session, t.id, d.id)
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peer_config = await get_peer_config(admin_session, t.id, peer.id)
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# allowed-address should be tenant-specific subnet, not 10.10.0.0/24
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commands_str = " ".join(peer_config["routeros_commands"])
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assert "10.10.1.0/24" in commands_str
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assert "10.10.0.0/24" not in commands_str
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# Server public key should be the global key
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assert peer_config["server_public_key"] == config.server_public_key
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class TestTenantDeletion:
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@pytest.mark.asyncio
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async def test_vpn_config_deleted_with_tenant(
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self, admin_session, create_test_tenant, create_test_device
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):
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"""Verify VPN config and peers are cleaned up when tenant is deleted (CASCADE)."""
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t1 = await create_test_tenant(admin_session, name="keep-svc")
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t2 = await create_test_tenant(admin_session, name="delete-svc")
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await setup_vpn(admin_session, t1.id)
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await setup_vpn(admin_session, t2.id)
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d1 = await create_test_device(admin_session, t1.id)
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d2 = await create_test_device(admin_session, t2.id)
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await add_peer(admin_session, t1.id, d1.id)
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await add_peer(admin_session, t2.id, d2.id)
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# Delete tenant 2
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from app.models.tenant import Tenant
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result = await admin_session.execute(
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select(Tenant).where(Tenant.id == t2.id)
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)
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tenant_obj = result.scalar_one()
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await admin_session.delete(tenant_obj)
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await admin_session.flush()
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# VPN config for deleted tenant should be gone (CASCADE)
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deleted_config = await get_vpn_config(admin_session, t2.id)
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assert deleted_config is None
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# VPN config for kept tenant should still exist
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kept_config = await get_vpn_config(admin_session, t1.id)
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assert kept_config is not None
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assert kept_config.subnet == "10.10.1.0/24"
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