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fake_discovery.go
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fake_discovery.go
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// Copyright (c) 2020 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 (
"errors"
"sync"
"github.com/gardener/gardener/pkg/client/kubernetes"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/version"
"k8s.io/client-go/discovery"
fakediscovery "k8s.io/client-go/discovery/fake"
"k8s.io/client-go/restmapper"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// FakeDiscovery is used to tests, more specifically - chart applier.
type FakeDiscovery struct {
*fakediscovery.FakeDiscovery
lock sync.Mutex
GroupListFn func() *metav1.APIGroupList
ResourceMapFn func() map[string]*metav1.APIResourceList
}
// ServerResourcesForGroupVersion returns resource lists from ResourceMapFn
func (c *FakeDiscovery) ServerResourcesForGroupVersion(groupVersion string) (*metav1.APIResourceList, error) {
c.lock.Lock()
defer c.lock.Unlock()
if c.ResourceMapFn != nil {
if rl, ok := c.ResourceMapFn()[groupVersion]; ok {
return rl, nil
}
}
return nil, errors.New("doesn't exist")
}
// ServerGroups return group lists from ResourceMapFn
func (c *FakeDiscovery) ServerGroups() (*metav1.APIGroupList, error) {
c.lock.Lock()
defer c.lock.Unlock()
if c.GroupListFn != nil {
if groupList := c.GroupListFn(); groupList != nil {
return groupList, nil
}
}
return nil, errors.New("doesn't exist")
}
// ServerVersion return empty version.
func (c *FakeDiscovery) ServerVersion() (*version.Info, error) {
return &version.Info{}, nil
}
// NewTestApplier creates a new fake applier.
func NewTestApplier(c client.Client, discovery discovery.DiscoveryInterface) (kubernetes.Applier, error) {
groupResources, err := restmapper.GetAPIGroupResources(discovery)
if err != nil {
return nil, err
}
return kubernetes.NewApplier(c, restmapper.NewDiscoveryRESTMapper(groupResources)), nil
}