test: implement mock OAuth2 server infrastructure for auth testing
- Add MockOAuth2ServerContainer using testcontainers - Create conftest_oauth.py with OAuth test fixtures - Add comprehensive OAuth integration tests - Support both mock (default) and real (CI secrets) OAuth modes - Add documentation for OAuth testing setup Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
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"""
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Mock OAuth2/OIDC Server for testing authentication flows.
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Uses testcontainers to spin up a mock-oauth2-server instance that provides
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a complete OIDC provider with .well-known/openid-configuration, JWKS, token,
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and userinfo endpoints.
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This allows for realistic OAuth testing without requiring a real IdP.
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"""
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import json
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import logging
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import time
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from typing import Dict, Optional
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from urllib.parse import urljoin
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import requests
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from testcontainers.core.container import DockerContainer
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logger = logging.getLogger(__name__)
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class MockOAuth2ServerContainer(DockerContainer):
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"""
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Testcontainer for mock-oauth2-server.
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Provides a complete OIDC provider for testing OAuth2 flows.
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"""
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def __init__(
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self,
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image: str = "ghcr.io/navikt/mock-oauth2-server:2.1.1",
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port: int = 8080,
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issuer_id: str = "default",
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):
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"""
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Initialize the mock OAuth2 server container.
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Args:
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image: Docker image to use
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port: Internal container port (default 8080)
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issuer_id: Issuer identifier for the mock server
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"""
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super().__init__(image)
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self.port = port
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self.issuer_id = issuer_id
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self.with_exposed_ports(port)
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def get_base_url(self) -> str:
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"""Get the base URL for the mock OAuth server."""
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host = self.get_container_host_ip()
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port = self.get_exposed_port(self.port)
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return f"http://{host}:{port}"
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def get_issuer_url(self) -> str:
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"""Get the issuer URL for the OIDC provider."""
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return f"{self.get_base_url()}/{self.issuer_id}"
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def get_well_known_url(self) -> str:
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"""Get the .well-known/openid-configuration URL."""
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return f"{self.get_issuer_url()}/.well-known/openid-configuration"
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def get_token_endpoint(self) -> str:
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"""Get the token endpoint URL."""
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return f"{self.get_issuer_url()}/token"
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def get_authorization_endpoint(self) -> str:
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"""Get the authorization endpoint URL."""
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return f"{self.get_issuer_url()}/authorize"
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def get_userinfo_endpoint(self) -> str:
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"""Get the userinfo endpoint URL."""
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return f"{self.get_issuer_url()}/userinfo"
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def get_jwks_uri(self) -> str:
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"""Get the JWKS URI."""
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return f"{self.get_issuer_url()}/jwks"
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def wait_for_ready(self, timeout: int = 30) -> None:
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"""
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Wait for the OAuth server to be ready by checking the well-known endpoint.
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Args:
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timeout: Maximum time to wait in seconds
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"""
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start_time = time.time()
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while time.time() - start_time < timeout:
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try:
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response = requests.get(self.get_well_known_url(), timeout=5)
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if response.status_code == 200:
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logger.info(f"Mock OAuth2 server is ready at {self.get_base_url()}")
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return
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except requests.exceptions.RequestException:
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pass
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time.sleep(0.5)
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raise TimeoutError(f"Mock OAuth2 server did not become ready within {timeout}s")
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def get_config(self) -> Dict[str, str]:
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"""
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Get the OAuth configuration for the mock server.
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Returns:
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Dictionary with OAuth endpoints and configuration
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"""
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return {
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"issuer": self.get_issuer_url(),
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"authorization_endpoint": self.get_authorization_endpoint(),
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"token_endpoint": self.get_token_endpoint(),
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"userinfo_endpoint": self.get_userinfo_endpoint(),
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"jwks_uri": self.get_jwks_uri(),
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"well_known_url": self.get_well_known_url(),
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"base_url": self.get_base_url(),
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}
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def create_token(
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self,
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subject: str = "test-user",
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claims: Optional[Dict] = None,
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audience: str = "test-client",
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) -> str:
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"""
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Create a mock JWT token.
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The mock-oauth2-server will generate a valid JWT that can be verified
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using its JWKS endpoint.
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Args:
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subject: Subject (sub) claim for the token
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claims: Additional claims to include in the token
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audience: Audience (aud) claim
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Returns:
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JWT token string
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"""
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if claims is None:
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claims = {}
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# Add standard claims
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token_claims = {
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"sub": subject,
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"aud": audience,
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**claims,
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}
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# The debugger endpoint expects a different format
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# For simpler testing, we'll use the token endpoint directly
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# with a mock authorization code flow
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# Note: For actual tests, we'll mock the token exchange in the tests
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# This method is mainly for documentation/example purposes
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logger.info(f"Creating token for subject: {subject}")
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# Return a placeholder - in actual tests we'll mock the OAuth flow
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return f"mock-token-{subject}"
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def create_test_userinfo(
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sub: str = "test-user-123",
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email: str = "test@example.com",
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name: str = "Test User",
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preferred_username: str = "testuser",
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groups: Optional[list] = None,
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) -> Dict:
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"""
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Create a test userinfo response.
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Args:
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sub: Subject identifier
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email: User email address
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name: Full name
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preferred_username: Username
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groups: List of group names
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Returns:
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Dictionary with userinfo claims
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"""
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if groups is None:
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groups = ["admin"]
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return {
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"sub": sub,
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"email": email,
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"email_verified": True,
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"name": name,
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"preferred_username": preferred_username,
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"groups": groups,
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"picture": f"https://www.gravatar.com/avatar/{sub}?d=identicon",
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}
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def configure_mock_oauth_response(
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container: MockOAuth2ServerContainer,
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code: str,
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userinfo: Optional[Dict] = None,
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access_token: Optional[str] = None,
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) -> None:
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"""
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Configure the mock OAuth server to return specific responses for a code.
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This is useful for testing the OAuth callback flow.
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Args:
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container: The mock OAuth server container
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code: Authorization code to configure
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userinfo: Userinfo response to return
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access_token: Access token to return (if None, server generates one)
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"""
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if userinfo is None:
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userinfo = create_test_userinfo()
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# The mock-oauth2-server automatically handles code exchange
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# and returns the configured userinfo
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# This is a placeholder for any additional configuration needed
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logger.info(f"Configured mock OAuth response for code: {code}")
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