fix(09): WR-10 keep cabana's own backend guard when it is activated twice on one application

modules/bouncer/registry_test.go

@@ -289,3 +289,20 @@ func TestRegisterAcceptsValidGuards(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestRegistryOwner(t *testing.T) {
+	reg := NewRegistry()
+	if _, ok := reg.Owner("backend"); ok {
+		t.Fatal("an unregistered guard reported an owner")
+	}
+	if err := reg.Register("acme.owner", "backend", NewBackendJWTGuard("test-secret-for-registry-owner", nil, nil, nil)); err != nil {
+		t.Fatal(err)
+	}
+	if owner, ok := reg.Owner("backend"); !ok || owner != "acme.owner" {
+		t.Fatalf("Owner = %q, %v; want acme.owner", owner, ok)
+	}
+	var nilReg *Registry
+	if _, ok := nilReg.Owner("backend"); ok {
+		t.Fatal("a nil registry reported an owner")
+	}
+}