openapi: add spec roundtrip test

pkg/generated/openapi/openapi_test.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package openapi
+
+import (
+	"encoding/json"
+	"reflect"
+	"testing"
+
+	"github.com/go-openapi/spec"
+
+	"k8s.io/apimachinery/pkg/util/diff"
+)
+
+func TestOpenAPIRoundtrip(t *testing.T) {
+	dummyRef := func(name string) spec.Ref { return spec.MustCreateRef("#/definitions/dummy") }
+	for name, value := range GetOpenAPIDefinitions(dummyRef) {
+		t.Run(name, func(t *testing.T) {
+			data, err := json.Marshal(value.Schema)
+			if err != nil {
+				t.Error(err)
+				return
+			}
+
+			roundTripped := spec.Schema{}
+			if err := json.Unmarshal(data, &roundTripped); err != nil {
+				t.Error(err)
+				return
+			}
+
+			if !reflect.DeepEqual(value.Schema, roundTripped) {
+				t.Errorf("unexpected diff (a=expected,b=roundtripped):\n%s", diff.ObjectReflectDiff(value.Schema, roundTripped))
+				return
+			}
+		})
+	}
+}