Update version to 2.0.0 and enhance chaos engineering features in Flakestorm. Added support for environment chaos, behavioral contracts, and replay regression. Expanded documentation and improved scoring mechanisms. Updated .gitignore to include new documentation files.

tests/test_contract_integration.py

@@ -0,0 +1,67 @@
+"""Integration tests for contract engine: matrix, verifier integration, reset."""
+
+from __future__ import annotations
+
+import pytest
+
+from flakestorm.contracts.matrix import ResilienceMatrix, SEVERITY_WEIGHT, CellResult
+from flakestorm.contracts.engine import (
+    _contract_invariant_to_invariant_config,
+    _scenario_to_chaos_config,
+    STATEFUL_WARNING,
+)
+from flakestorm.core.config import (
+    ContractConfig,
+    ContractInvariantConfig,
+    ChaosScenarioConfig,
+    ChaosConfig,
+    ToolFaultConfig,
+    InvariantType,
+)
+
+
+class TestResilienceMatrix:
+    """Test resilience matrix and score."""
+
+    def test_empty_score(self):
+        m = ResilienceMatrix()
+        assert m.resilience_score == 100.0
+        assert m.passed is True
+
+    def test_weighted_score(self):
+        m = ResilienceMatrix()
+        m.add_result("inv1", "sc1", "critical", True)
+        m.add_result("inv2", "sc1", "high", False)
+        m.add_result("inv3", "sc1", "medium", True)
+        assert m.resilience_score < 100.0
+        assert m.passed is True  # no critical failed yet
+        m.add_result("inv0", "sc1", "critical", False)
+        assert m.critical_failed is True
+        assert m.passed is False
+
+    def test_severity_weights(self):
+        assert SEVERITY_WEIGHT["critical"] == 3
+        assert SEVERITY_WEIGHT["high"] == 2
+        assert SEVERITY_WEIGHT["medium"] == 1
+
+
+class TestContractEngineHelpers:
+    """Test contract invariant conversion and scenario to chaos."""
+
+    def test_contract_invariant_to_invariant_config(self):
+        c = ContractInvariantConfig(id="t1", type="contains", value="ok", severity="high")
+        inv = _contract_invariant_to_invariant_config(c)
+        assert inv.type == InvariantType.CONTAINS
+        assert inv.value == "ok"
+        assert inv.severity == "high"
+
+    def test_scenario_to_chaos_config(self):
+        sc = ChaosScenarioConfig(
+            name="test",
+            tool_faults=[ToolFaultConfig(tool="*", mode="error", error_code=503)],
+            llm_faults=[],
+        )
+        chaos = _scenario_to_chaos_config(sc)
+        assert isinstance(chaos, ChaosConfig)
+        assert len(chaos.tool_faults) == 1
+        assert chaos.tool_faults[0].mode == "error"