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d817b84 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 | """Tests for the policy engine."""
import pytest
from pathlib import Path
from unittest.mock import Mock, patch
from fastmcp.policy import PolicyEngine, PolicyRegistry, Decision
from fastmcp.policy.policies import MinimumNecessaryAccessPolicy, RBACPolicy
class TestPolicyEngine:
"""Test the policy engine functionality."""
@pytest.fixture
def policy_engine(self):
"""Create a policy engine for testing."""
return PolicyEngine()
@pytest.fixture
def sample_context(self):
"""Create a sample context for testing."""
return {
"user": {
"id": "user123",
"roles": ["user"],
"permissions": ["read", "write"]
},
"action": "read",
"resource": {
"type": "document",
"id": "doc123",
"owner": "user123",
"visibility": "private"
}
}
def test_policy_engine_initialization(self, policy_engine):
"""Test policy engine initialization."""
assert policy_engine.registry is not None
assert isinstance(policy_engine.registry, PolicyRegistry)
assert policy_engine._evaluation_order == []
def test_set_evaluation_order(self, policy_engine):
"""Test setting evaluation order."""
order = ["policy1", "policy2", "policy3"]
policy_engine.set_evaluation_order(order)
assert policy_engine._evaluation_order == order
@pytest.mark.asyncio
async def test_evaluate_no_policies(self, policy_engine, sample_context):
"""Test evaluation when no policies are registered."""
decision = await policy_engine.evaluate(sample_context)
assert decision.allow is True
assert "All policies evaluated successfully" in decision.reason
@pytest.mark.asyncio
async def test_evaluate_single_policy(self, policy_engine, sample_context):
"""Test evaluation of a single policy."""
# Register a policy
policy = MinimumNecessaryAccessPolicy()
policy_engine.register_policy(policy)
# Evaluate
decision = await policy_engine.evaluate(sample_context)
assert decision.allow is True
# The policy engine returns its own response, not the individual policy response
assert "All policies evaluated successfully" in decision.reason
@pytest.mark.asyncio
async def test_evaluate_specific_policies(self, policy_engine, sample_context):
"""Test evaluation of specific policies."""
# Register multiple policies
policy1 = MinimumNecessaryAccessPolicy(name="policy1")
policy2 = RBACPolicy(name="policy2")
policy_engine.register_policy(policy1)
policy_engine.register_policy(policy2)
# Evaluate only policy1
decision = await policy_engine.evaluate(sample_context, ["policy1"])
assert decision.allow is True
@pytest.mark.asyncio
async def test_evaluate_policy_denial(self, policy_engine):
"""Test evaluation when a policy denies access."""
# Create context with sensitive action
context = {
"user": {"roles": ["user"]},
"action": "delete",
"resource": {"type": "user_data"}
}
# Register minimum necessary policy
policy = MinimumNecessaryAccessPolicy()
policy_engine.register_policy(policy)
# Evaluate
decision = await policy_engine.evaluate(context)
assert decision.allow is False
assert "requires justification" in decision.reason
@pytest.mark.asyncio
async def test_evaluate_single_policy_method(self, policy_engine, sample_context):
"""Test evaluate_single_policy method."""
# Register a policy
policy = MinimumNecessaryAccessPolicy(name="test_policy")
policy_engine.register_policy(policy)
# Evaluate single policy
decision = await policy_engine.evaluate_single_policy("test_policy", sample_context)
assert decision is not None
assert decision.allow is True
@pytest.mark.asyncio
async def test_evaluate_single_policy_not_found(self, policy_engine, sample_context):
"""Test evaluate_single_policy with non-existent policy."""
decision = await policy_engine.evaluate_single_policy("non_existent", sample_context)
assert decision is None
def test_get_policy_metadata(self, policy_engine):
"""Test getting policy metadata."""
# Register policies
policy1 = MinimumNecessaryAccessPolicy(name="policy1")
policy2 = RBACPolicy(name="policy2")
policy_engine.register_policy(policy1)
policy_engine.register_policy(policy2)
metadata = policy_engine.get_policy_metadata()
assert len(metadata) == 2
assert any(p["name"] == "policy1" for p in metadata)
assert any(p["name"] == "policy2" for p in metadata)
def test_register_unregister_policy(self, policy_engine):
"""Test policy registration and unregistration."""
policy = MinimumNecessaryAccessPolicy(name="test_policy")
# Register
policy_engine.register_policy(policy)
assert policy_engine.registry.get_policy("test_policy") is not None
# Unregister
unregistered = policy_engine.unregister_policy("test_policy")
assert unregistered is not None
assert unregistered.name == "test_policy"
assert policy_engine.registry.get_policy("test_policy") is None
class TestPolicyRegistry:
"""Test the policy registry functionality."""
@pytest.fixture
def registry(self):
"""Create a policy registry for testing."""
return PolicyRegistry()
def test_registry_initialization(self, registry):
"""Test registry initialization."""
assert registry._policies == {}
assert registry._policy_classes == {}
def test_register_policy(self, registry):
"""Test policy registration."""
policy = MinimumNecessaryAccessPolicy()
registry.register_policy(policy)
assert "minimum_necessary_access" in registry._policies
def test_unregister_policy(self, registry):
"""Test policy unregistration."""
policy = MinimumNecessaryAccessPolicy()
registry.register_policy(policy)
unregistered = registry.unregister_policy("minimum_necessary_access")
assert unregistered is not None
assert "minimum_necessary_access" not in registry._policies
def test_get_policy(self, registry):
"""Test getting a policy."""
policy = MinimumNecessaryAccessPolicy()
registry.register_policy(policy)
retrieved = registry.get_policy("minimum_necessary_access")
assert retrieved is not None
assert retrieved.name == "minimum_necessary_access"
def test_list_policies(self, registry):
"""Test listing policies."""
policy1 = MinimumNecessaryAccessPolicy(name="policy1")
policy2 = RBACPolicy(name="policy2")
registry.register_policy(policy1)
registry.register_policy(policy2)
policies = registry.list_policies()
assert len(policies) == 2
assert any(p["name"] == "policy1" for p in policies)
assert any(p["name"] == "policy2" for p in policies)
def test_register_policy_class(self, registry):
"""Test registering a policy class."""
registry.register_policy_class("test_policy", MinimumNecessaryAccessPolicy)
assert "test_policy" in registry._policy_classes
assert registry._policy_classes["test_policy"] == MinimumNecessaryAccessPolicy
def test_register_invalid_policy_class(self, registry):
"""Test registering an invalid policy class."""
with pytest.raises(ValueError):
registry.register_policy_class("invalid", str)
def test_create_policy_from_config(self, registry):
"""Test creating policy from configuration."""
registry.register_policy_class("test_policy", MinimumNecessaryAccessPolicy)
config = {
"type": "test_policy",
"parameters": {
"name": "config_policy",
"required_justification": False
}
}
policy = registry.create_policy_from_config(config)
assert policy is not None
assert policy.name == "config_policy"
assert isinstance(policy, MinimumNecessaryAccessPolicy)
def test_create_policy_from_invalid_config(self, registry):
"""Test creating policy from invalid configuration."""
config = {"type": "non_existent"}
policy = registry.create_policy_from_config(config)
assert policy is None
class TestPolicyLoadAndReload:
"""Test policy loading and hot-reload functionality."""
@pytest.fixture
def registry(self):
"""Create a policy registry for testing."""
return PolicyRegistry()
@pytest.fixture
def yaml_config_file(self, tmp_path):
"""Create a temporary YAML config file."""
config_content = """
policies:
- name: yaml_policy1
type: minimum_necessary
parameters:
required_justification: false
- name: yaml_policy2
type: rbac
parameters:
version: "1.0.0"
"""
config_file = tmp_path / "policies.yaml"
config_file.write_text(config_content)
return config_file
def test_load_policies_from_yaml(self, registry, yaml_config_file):
"""Test loading policies from YAML file."""
# Register policy classes
registry.register_policy_class("minimum_necessary", MinimumNecessaryAccessPolicy)
registry.register_policy_class("rbac", RBACPolicy)
# Load from YAML
registry.load_policies_from_yaml(yaml_config_file)
# Check that policies were loaded
assert registry.get_policy("yaml_policy1") is not None
assert registry.get_policy("yaml_policy2") is not None
def test_hot_reload_policies(self, registry, yaml_config_file):
"""Test hot reloading policies."""
# Register policy classes
registry.register_policy_class("minimum_necessary", MinimumNecessaryAccessPolicy)
registry.register_policy_class("rbac", RBACPolicy)
# Initial load
registry.load_policies_from_yaml(yaml_config_file)
initial_count = len(registry._policies)
# Hot reload
registry.hot_reload_policies(yaml_config_file)
# Check that policies were reloaded
assert len(registry._policies) == initial_count
assert registry.get_policy("yaml_policy1") is not None
assert registry.get_policy("yaml_policy2") is not None
@patch('importlib.metadata.entry_points')
def test_load_policy_from_entry_point(self, mock_entry_points, registry):
"""Test loading policies from entry points."""
# Mock entry points
mock_entry_point = Mock()
mock_entry_point.name = "test_policy"
mock_entry_point.load.return_value = MinimumNecessaryAccessPolicy
mock_entry_points.return_value.select.return_value = [mock_entry_point]
# Load from entry points
registry.load_policy_from_entry_point("fastmcp.policies")
# Check that policy was loaded
assert registry.get_policy("test_policy") is not None
class TestPolicyIntegration:
"""Test policy integration with FastMCP server."""
@pytest.mark.asyncio
async def test_policy_engine_with_server(self):
"""Test policy engine integration with FastMCP server."""
from fastmcp import FastMCP
# Create server with policy engine
server = FastMCP("Test Server")
policy_engine = server.enable_policy_engine()
# Register policies
policy_engine.register_policy(MinimumNecessaryAccessPolicy())
policy_engine.register_policy(RBACPolicy())
# Test that policy engine is accessible
assert server.get_policy_engine() is not None
assert server.get_policy_engine() == policy_engine
# Test policy evaluation
context = {
"user": {"roles": ["user"]},
"action": "read",
"resource": {"type": "document"}
}
decision = await policy_engine.evaluate(context)
assert decision.allow is True
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