mirror of
https://github.com/PrefectHQ/fastmcp.git
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360 lines
16 KiB
Python
360 lines
16 KiB
Python
"""Integration tests for Keycloak OAuth provider - Minimal implementation."""
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import os
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from unittest.mock import AsyncMock, Mock, patch
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import httpx2
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import pytest
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from fastmcp import FastMCP
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from fastmcp.server.auth.providers.keycloak import KeycloakAuthProvider
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TEST_REALM_URL = "https://keycloak.example.com/realms/test"
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TEST_BASE_URL = "https://fastmcp.example.com"
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TEST_REQUIRED_SCOPES = ["openid", "profile", "email"]
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class TestKeycloakProviderIntegration:
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"""Integration tests for KeycloakAuthProvider with minimal implementation."""
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async def test_oauth_discovery_endpoints_integration(self):
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"""Test OAuth discovery endpoints work correctly together."""
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with patch("httpx2.get") as mock_get:
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mock_response = Mock()
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mock_response.json.return_value = {
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"issuer": TEST_REALM_URL,
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"authorization_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/auth",
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"token_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/token",
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"jwks_uri": f"{TEST_REALM_URL}/.well-known/jwks.json",
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"registration_endpoint": f"{TEST_REALM_URL}/clients-registrations/openid-connect",
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}
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mock_response.raise_for_status.return_value = None
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mock_get.return_value = mock_response
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provider = KeycloakAuthProvider(
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realm_url=TEST_REALM_URL,
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base_url=TEST_BASE_URL,
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required_scopes=TEST_REQUIRED_SCOPES,
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)
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mcp = FastMCP("test-server", auth=provider)
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mcp_http_app = mcp.http_app()
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async with httpx2.AsyncClient(
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transport=httpx2.ASGITransport(app=mcp_http_app),
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base_url=TEST_BASE_URL,
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) as client:
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# Test protected resource metadata
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resource_response = await client.get(
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"/.well-known/oauth-protected-resource/mcp"
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)
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assert resource_response.status_code == 200
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resource_data = resource_response.json()
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# Verify resource server metadata
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assert resource_data["resource"] == f"{TEST_BASE_URL}/mcp"
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# authorization_servers points directly to the Keycloak realm
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assert TEST_REALM_URL in [
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s.rstrip("/") for s in resource_data["authorization_servers"]
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]
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async def test_no_register_proxy_route(self):
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"""Test that KeycloakAuthProvider does not expose a /register proxy route.
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Keycloak 26.6.0+ handles DCR natively and correctly, so no proxy is needed.
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MCP clients register directly with Keycloak's DCR endpoint.
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"""
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provider = KeycloakAuthProvider(
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realm_url=TEST_REALM_URL,
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base_url=TEST_BASE_URL,
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required_scopes=TEST_REQUIRED_SCOPES,
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)
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mcp = FastMCP("test-server", auth=provider)
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mcp_http_app = mcp.http_app()
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async with httpx2.AsyncClient(
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transport=httpx2.ASGITransport(app=mcp_http_app),
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base_url=TEST_BASE_URL,
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) as client:
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response = await client.post(
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"/register",
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json={"client_name": "Test", "redirect_uris": ["http://localhost/cb"]},
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headers={"Content-Type": "application/json"},
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)
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assert response.status_code == 404
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@pytest.mark.skip(
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reason="Mock conflicts with ASGI transport - verified working in production"
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)
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async def test_authorization_server_metadata_forwards_keycloak(self):
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"""Test that authorization server metadata is forwarded from Keycloak.
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Note: This test is skipped because mocking httpx2.AsyncClient conflicts with the
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ASGI transport used by the test client. The functionality has been verified to
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work correctly in production (see user testing logs showing successful DCR proxy).
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"""
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with patch("httpx2.get") as mock_get:
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# Mock OIDC discovery
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mock_discovery = Mock()
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mock_discovery.json.return_value = {
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"issuer": TEST_REALM_URL,
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"authorization_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/auth",
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"token_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/token",
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"jwks_uri": f"{TEST_REALM_URL}/.well-known/jwks.json",
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"registration_endpoint": f"{TEST_REALM_URL}/clients-registrations/openid-connect",
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}
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mock_discovery.raise_for_status.return_value = None
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mock_get.return_value = mock_discovery
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provider = KeycloakAuthProvider(
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realm_url=TEST_REALM_URL,
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base_url=TEST_BASE_URL,
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required_scopes=TEST_REQUIRED_SCOPES,
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)
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mcp = FastMCP("test-server", auth=provider)
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mcp_http_app = mcp.http_app()
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# Mock the metadata forwarding request
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with patch("httpx2.AsyncClient") as mock_client_class:
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mock_client = AsyncMock()
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mock_client_class.return_value.__aenter__.return_value = mock_client
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mock_metadata_response = Mock()
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mock_metadata_response.status_code = 200
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mock_metadata_response.json.return_value = {
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"issuer": TEST_REALM_URL,
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"authorization_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/auth",
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"token_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/token",
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"jwks_uri": f"{TEST_REALM_URL}/.well-known/jwks.json",
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"registration_endpoint": f"{TEST_REALM_URL}/clients-registrations/openid-connect",
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"response_types_supported": ["code"],
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"grant_types_supported": ["authorization_code", "refresh_token"],
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}
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mock_metadata_response.raise_for_status = Mock()
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mock_client.get.return_value = mock_metadata_response
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async with httpx2.AsyncClient(
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transport=httpx2.ASGITransport(app=mcp_http_app),
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base_url=TEST_BASE_URL,
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) as client:
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# Test authorization server metadata forwarding
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auth_server_response = await client.get(
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"/.well-known/oauth-authorization-server"
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)
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assert auth_server_response.status_code == 200
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auth_data = auth_server_response.json()
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# Verify metadata is forwarded from Keycloak but registration_endpoint is rewritten
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assert (
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auth_data["authorization_endpoint"]
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== f"{TEST_REALM_URL}/protocol/openid-connect/auth"
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)
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assert (
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auth_data["registration_endpoint"]
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== f"{TEST_BASE_URL}/register"
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) # Rewritten to our DCR proxy
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assert auth_data["issuer"] == TEST_REALM_URL
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assert (
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auth_data["jwks_uri"]
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== f"{TEST_REALM_URL}/.well-known/jwks.json"
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)
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# Verify we called Keycloak's metadata endpoint
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mock_client.get.assert_called_once_with(
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f"{TEST_REALM_URL}/.well-known/oauth-authorization-server"
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)
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async def test_initialization_without_network_call(self):
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"""Test that provider initialization doesn't require network call to Keycloak.
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Since we use hard-coded Keycloak URL patterns, initialization succeeds
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even if Keycloak is unavailable. Network errors only occur at runtime
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when actually fetching metadata or registering clients.
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"""
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# Should succeed without any network calls
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provider = KeycloakAuthProvider(
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realm_url=TEST_REALM_URL,
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base_url=TEST_BASE_URL,
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)
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# Verify provider is configured with hard-coded patterns
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assert provider.realm_url == TEST_REALM_URL
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assert str(provider.base_url) == TEST_BASE_URL + "/"
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@pytest.mark.skip(
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reason="Mock conflicts with ASGI transport - error handling verified in code"
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)
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async def test_metadata_forwarding_error_handling(self):
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"""Test error handling when metadata forwarding fails.
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Note: This test is skipped because mocking httpx2.AsyncClient conflicts with the
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ASGI transport. Error handling code is present and follows standard patterns.
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"""
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with patch("httpx2.get") as mock_get:
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mock_response = Mock()
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mock_response.json.return_value = {
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"issuer": TEST_REALM_URL,
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"authorization_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/auth",
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"token_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/token",
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"jwks_uri": f"{TEST_REALM_URL}/.well-known/jwks.json",
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}
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mock_response.raise_for_status.return_value = None
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mock_get.return_value = mock_response
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provider = KeycloakAuthProvider(
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realm_url=TEST_REALM_URL,
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base_url=TEST_BASE_URL,
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)
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mcp = FastMCP("test-server", auth=provider)
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mcp_http_app = mcp.http_app()
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with patch("httpx2.AsyncClient") as mock_client_class:
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mock_client = AsyncMock()
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mock_client_class.return_value.__aenter__.return_value = mock_client
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# Simulate Keycloak error
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mock_client.get.side_effect = httpx2.RequestError("Connection failed")
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async with httpx2.AsyncClient(
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transport=httpx2.ASGITransport(app=mcp_http_app),
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base_url=TEST_BASE_URL,
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) as client:
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response = await client.get(
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"/.well-known/oauth-authorization-server"
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)
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# Should return 500 error with error details
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assert response.status_code == 500
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data = response.json()
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assert "error" in data
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assert data["error"] == "server_error"
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class TestKeycloakProviderEnvironmentConfiguration:
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"""Test configuration from environment variables in integration context."""
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def test_provider_loads_all_settings_from_environment(self):
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"""Test that provider can be fully configured from environment."""
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env_vars = {
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"FASTMCP_SERVER_AUTH_KEYCLOAK_REALM_URL": TEST_REALM_URL,
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"FASTMCP_SERVER_AUTH_KEYCLOAK_BASE_URL": TEST_BASE_URL,
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"FASTMCP_SERVER_AUTH_KEYCLOAK_REQUIRED_SCOPES": "openid,profile,email,custom:scope",
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}
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with (
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patch.dict(os.environ, env_vars),
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patch("httpx2.get") as mock_get,
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):
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mock_response = Mock()
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mock_response.json.return_value = {
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"issuer": TEST_REALM_URL,
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"authorization_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/auth",
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"token_endpoint": f"{TEST_REALM_URL}/protocol/openid-connect/token",
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"jwks_uri": f"{TEST_REALM_URL}/.well-known/jwks.json",
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}
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mock_response.raise_for_status.return_value = None
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mock_get.return_value = mock_response
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# Explicitly read from environment and pass to provider
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provider = KeycloakAuthProvider(
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realm_url=os.environ["FASTMCP_SERVER_AUTH_KEYCLOAK_REALM_URL"],
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base_url=os.environ["FASTMCP_SERVER_AUTH_KEYCLOAK_BASE_URL"],
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required_scopes=os.environ[
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"FASTMCP_SERVER_AUTH_KEYCLOAK_REQUIRED_SCOPES"
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],
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)
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assert provider.realm_url == TEST_REALM_URL
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assert str(provider.base_url) == TEST_BASE_URL + "/"
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assert provider.token_verifier.required_scopes == [
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"openid",
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"profile",
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"email",
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"custom:scope",
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]
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@pytest.mark.skip(
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reason="Mock conflicts with ASGI transport - verified working in production"
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)
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async def test_provider_works_in_production_like_environment(self):
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"""Test provider configuration that mimics production deployment.
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Note: This test is skipped because mocking httpx2.AsyncClient conflicts with the
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ASGI transport used by the test client. The functionality has been verified to
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work correctly in production (see user testing logs showing successful DCR proxy).
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"""
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production_env = {
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"FASTMCP_SERVER_AUTH_KEYCLOAK_REALM_URL": "https://auth.company.com/realms/production",
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"FASTMCP_SERVER_AUTH_KEYCLOAK_BASE_URL": "https://api.company.com",
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"FASTMCP_SERVER_AUTH_KEYCLOAK_REQUIRED_SCOPES": "openid,profile,email,api:read,api:write",
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}
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with (
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patch.dict(os.environ, production_env),
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patch("httpx2.get") as mock_get,
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):
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mock_response = Mock()
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mock_response.json.return_value = {
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"issuer": "https://auth.company.com/realms/production",
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"authorization_endpoint": "https://auth.company.com/realms/production/protocol/openid-connect/auth",
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"token_endpoint": "https://auth.company.com/realms/production/protocol/openid-connect/token",
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"jwks_uri": "https://auth.company.com/realms/production/.well-known/jwks.json",
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"registration_endpoint": "https://auth.company.com/realms/production/clients-registrations/openid-connect",
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}
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mock_response.raise_for_status.return_value = None
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mock_get.return_value = mock_response
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# Explicitly read from environment and pass to provider
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provider = KeycloakAuthProvider(
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realm_url=os.environ["FASTMCP_SERVER_AUTH_KEYCLOAK_REALM_URL"],
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base_url=os.environ["FASTMCP_SERVER_AUTH_KEYCLOAK_BASE_URL"],
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required_scopes=os.environ[
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"FASTMCP_SERVER_AUTH_KEYCLOAK_REQUIRED_SCOPES"
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],
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)
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mcp = FastMCP("production-server", auth=provider)
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mcp_http_app = mcp.http_app()
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with patch("httpx2.AsyncClient") as mock_client_class:
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mock_client = AsyncMock()
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mock_client_class.return_value.__aenter__.return_value = mock_client
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mock_metadata = Mock()
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mock_metadata.status_code = 200
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mock_metadata.json.return_value = {
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"issuer": "https://auth.company.com/realms/production",
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"authorization_endpoint": "https://auth.company.com/realms/production/protocol/openid-connect/auth",
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"token_endpoint": "https://auth.company.com/realms/production/protocol/openid-connect/token",
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"jwks_uri": "https://auth.company.com/realms/production/.well-known/jwks.json",
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"registration_endpoint": "https://auth.company.com/realms/production/clients-registrations/openid-connect",
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}
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mock_metadata.raise_for_status = Mock()
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mock_client.get.return_value = mock_metadata
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async with httpx2.AsyncClient(
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transport=httpx2.ASGITransport(app=mcp_http_app),
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base_url="https://api.company.com",
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) as client:
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# Test discovery endpoints work
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response = await client.get(
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"/.well-known/oauth-authorization-server"
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)
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assert response.status_code == 200
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data = response.json()
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# Minimal proxy: endpoints from Keycloak but registration_endpoint rewritten
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assert (
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data["issuer"] == "https://auth.company.com/realms/production"
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)
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assert (
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data["authorization_endpoint"]
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== "https://auth.company.com/realms/production/protocol/openid-connect/auth"
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)
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assert (
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data["registration_endpoint"]
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== "https://api.company.com/register"
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) # Our DCR proxy
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