/
test_resources.go
138 lines (118 loc) · 3.75 KB
/
test_resources.go
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// Copyright (c) 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 test
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
"os"
"path/filepath"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apimachinery/pkg/util/sets"
k8syaml "k8s.io/apimachinery/pkg/util/yaml"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// EnsureTestResources reads test resources from path, applies them using the given client and returns the created
// objects.
func EnsureTestResources(ctx context.Context, c client.Client, namespaceName, path string) ([]client.Object, error) {
objects, err := ReadTestResources(c.Scheme(), namespaceName, path)
if err != nil {
return nil, fmt.Errorf("error decoding resources: %w", err)
}
for _, obj := range objects {
current := obj.DeepCopyObject().(client.Object)
if err := c.Get(ctx, client.ObjectKeyFromObject(current), current); err != nil {
if !apierrors.IsNotFound(err) {
return nil, err
}
// object doesn't exists, create it
if err := c.Create(ctx, obj); err != nil {
return nil, err
}
} else {
// object already exists, update it
if err := c.Patch(ctx, obj, client.MergeFromWithOptions(current, client.MergeFromWithOptimisticLock{})); err != nil {
return nil, err
}
}
}
return objects, nil
}
// ReadTestResources reads test resources from path, decodes them using the given scheme and returns the parsed objects.
// Objects are values of the proper API types, if registered in the given scheme, and *unstructured.Unstructured
// otherwise.
func ReadTestResources(scheme *runtime.Scheme, namespaceName, path string) ([]client.Object, error) {
decoder := serializer.NewCodecFactory(scheme).UniversalDeserializer()
files, err := os.ReadDir(path)
if err != nil {
return nil, err
}
// file extensions that may contain Webhooks
resourceExtensions := sets.NewString(".json", ".yaml", ".yml")
var objects []client.Object
for _, file := range files {
if file.IsDir() {
continue
}
// Only parse allowlisted file types
if !resourceExtensions.Has(filepath.Ext(file.Name())) {
continue
}
// Unmarshal Webhooks from file into structs
docs, err := readDocuments(filepath.Join(path, file.Name()))
if err != nil {
return nil, err
}
for _, doc := range docs {
obj, err := runtime.Decode(decoder, doc)
if err != nil {
return nil, err
}
clientObj, ok := obj.(client.Object)
if !ok {
return nil, fmt.Errorf("%T does not implement client.Object", obj)
}
if namespaceName != "" {
clientObj.SetNamespace(namespaceName)
}
objects = append(objects, clientObj)
}
}
return objects, nil
}
// readDocuments reads documents from file
func readDocuments(fp string) ([][]byte, error) {
b, err := os.ReadFile(fp)
if err != nil {
return nil, err
}
var docs [][]byte
reader := k8syaml.NewYAMLReader(bufio.NewReader(bytes.NewReader(b)))
for {
// Read document
doc, err := reader.Read()
if err != nil {
if err == io.EOF {
break
}
return nil, err
}
docs = append(docs, doc)
}
return docs, nil
}