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_performance.py

@@ -16,7 +16,9 @@ _performance = importlib.util.module_from_spec(_spec)
 _spec.loader.exec_module(_performance)
 
 # Re-export functions for tests
+calculate_overall_resilience = _performance.calculate_overall_resilience
 calculate_percentile = _performance.calculate_percentile
+calculate_resilience_matrix_score = _performance.calculate_resilience_matrix_score
 calculate_robustness_score = _performance.calculate_robustness_score
 calculate_statistics = _performance.calculate_statistics
 calculate_weighted_score = _performance.calculate_weighted_score
@@ -270,6 +272,57 @@ class TestCalculateStatistics:
         assert by_type["noise"]["pass_rate"] == 1.0
 
 
+class TestResilienceMatrixScore:
+    """V2: Contract resilience matrix score (severity-weighted)."""
+
+    def test_empty_returns_100(self):
+        score, overall, critical = calculate_resilience_matrix_score([], [])
+        assert score == 100.0
+        assert overall is True
+        assert critical is False
+
+    def test_all_passed(self):
+        score, overall, critical = calculate_resilience_matrix_score(
+            ["critical", "high"], [True, True]
+        )
+        assert score == 100.0
+        assert overall is True
+        assert critical is False
+
+    def test_severity_weighted_partial(self):
+        # critical=3, high=2, medium=1; one medium failed -> 5/6 * 100
+        score, overall, critical = calculate_resilience_matrix_score(
+            ["critical", "high", "medium"], [True, True, False]
+        )
+        assert abs(score - (5.0 / 6.0) * 100.0) < 0.02
+        assert overall is True
+        assert critical is False
+
+    def test_critical_failed(self):
+        _, overall, critical = calculate_resilience_matrix_score(
+            ["critical"], [False]
+        )
+        assert critical is True
+        assert overall is False
+
+
+class TestOverallResilience:
+    """V2: Overall weighted resilience from component scores."""
+
+    def test_empty_returns_one(self):
+        assert calculate_overall_resilience([], []) == 1.0
+
+    def test_weighted_average(self):
+        # 0.8*0.25 + 1.0*0.25 + 0.5*0.5 = 0.2 + 0.25 + 0.25 = 0.7
+        s = calculate_overall_resilience(
+            [0.8, 1.0, 0.5], [0.25, 0.25, 0.5]
+        )
+        assert abs(s - 0.7) < 0.001
+
+    def test_single_component(self):
+        assert calculate_overall_resilience([0.5], [1.0]) == 0.5
+
+
 class TestRustVsPythonParity:
     """Test that Rust and Python implementations give the same results."""