feat: add executable multiplayer SLO checks

server/observability/slo_test.go

@@ -0,0 +1,27 @@
+package observability
+
+import (
+	"testing"
+	"time"
+)
+
+func TestEvaluateSLOAcceptsHealthyWindow(t *testing.T) {
+	window := SLOWindow{RegionalRTT: []time.Duration{20 * time.Millisecond, 40 * time.Millisecond}, Assignment: []time.Duration{time.Second}, Connection: []time.Duration{time.Second}, APILatency: []time.Duration{100 * time.Millisecond}, Matches: []bool{true, true, true}, Headroom: .50}
+	if violations := EvaluateSLO(window); len(violations) != 0 {
+		t.Fatalf("healthy window violations = %+v", violations)
+	}
+}
+
+func TestEvaluateSLOFlagsEveryLaunchGate(t *testing.T) {
+	window := SLOWindow{RegionalRTT: []time.Duration{101 * time.Millisecond}, Assignment: []time.Duration{11 * time.Second}, Connection: []time.Duration{6 * time.Second}, APILatency: []time.Duration{251 * time.Millisecond}, Matches: []bool{true, false}, TickBacklog: true, Headroom: .29}
+	violations := EvaluateSLO(window)
+	if len(violations) != 7 {
+		t.Fatalf("violations = %+v", violations)
+	}
+}
+
+func TestEvaluateSLODoesNotInventFailureForEmptyOptionalWindows(t *testing.T) {
+	if violations := EvaluateSLO(SLOWindow{}); len(violations) != 0 {
+		t.Fatalf("empty window violations = %+v", violations)
+	}
+}