Deep-copy functions autogeneration.

pkg/runtime/deep_copy_generation_test.go

@@ -0,0 +1,87 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 runtime_test
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/api/v1"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/api/v1beta3"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
+
+	"github.com/golang/glog"
+)
+
+func generateDeepCopies(t *testing.T, version string) bytes.Buffer {
+	g := runtime.NewDeepCopyGenerator(api.Scheme.Raw())
+	g.OverwritePackage(version, "")
+	testedVersion := version
+	if version == "api" {
+		testedVersion = api.Scheme.Raw().InternalVersion
+	}
+	for _, knownType := range api.Scheme.KnownTypes(testedVersion) {
+		if err := g.AddType(knownType); err != nil {
+			glog.Errorf("error while generating deep-copy functions for %v: %v", knownType, err)
+		}
+	}
+
+	var functions bytes.Buffer
+	functionsWriter := bufio.NewWriter(&functions)
+	if err := g.WriteImports(functionsWriter, version); err != nil {
+		t.Fatalf("couldn't generate deep-copy function imports: %v", err)
+	}
+	if err := g.WriteDeepCopyFunctions(functionsWriter); err != nil {
+		t.Fatalf("couldn't generate deep-copy functions: %v", err)
+	}
+	if err := g.RegisterDeepCopyFunctions(functionsWriter, version); err != nil {
+		t.Fatalf("couldn't generate deep-copy function names: %v", err)
+	}
+	if err := functionsWriter.Flush(); err != nil {
+		t.Fatalf("error while flushing writer")
+	}
+
+	return functions
+}
+
+func TestNoManualChangesToGenerateDeepCopies(t *testing.T) {
+	versions := []string{"api", "v1beta3", "v1"}
+
+	for _, version := range versions {
+		fileName := ""
+		if version == "api" {
+			fileName = "../../pkg/api/deep_copy_generated.go"
+		} else {
+			fileName = fmt.Sprintf("../../pkg/api/%s/deep_copy_generated.go", version)
+		}
+
+		existingFunctions := bufferExistingGeneratedCode(t, fileName)
+		generatedFunctions := generateDeepCopies(t, version)
+
+		functionsTxt := fmt.Sprintf("%s.deep_copy.txt", version)
+		ioutil.WriteFile(functionsTxt, generatedFunctions.Bytes(), os.FileMode(0644))
+
+		if ok := compareBuffers(t, functionsTxt, existingFunctions, generatedFunctions); ok {
+			os.Remove(functionsTxt)
+		}
+	}
+}