mirror of https://github.com/knative/pkg.git
85 lines
2.4 KiB
Go
85 lines
2.4 KiB
Go
/*
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Copyright 2019 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package testing
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import (
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"fmt"
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"sync/atomic"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/runtime"
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clientgotesting "k8s.io/client-go/testing"
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)
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// GenerateNameReactor will simulate the k8s API server
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// and generate a name for resources who's metadata.generateName
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// property is set. This happens only for CreateAction types
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//
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// This generator is deterministic (unliked k8s) and uses a global
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// counter to help make test names predictable
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type GenerateNameReactor struct {
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count int64
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}
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// Handles contains all the logic to generate the name and mutates
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// the create action object
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//
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// This is a hack as 'React' is passed a DeepCopy of the action hence
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// this is the only opportunity to 'mutate' the action in the
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// ReactionChain and have to continue executing additional reactors
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//
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// We should push changes upstream to client-go to help us with
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// mocking
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func (r *GenerateNameReactor) Handles(action clientgotesting.Action) bool {
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create, ok := action.(clientgotesting.CreateAction)
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if !ok {
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return false
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}
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objMeta, err := meta.Accessor(create.GetObject())
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if err != nil {
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return false
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}
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if objMeta.GetName() != "" {
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return false
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}
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if objMeta.GetGenerateName() == "" {
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return false
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}
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val := atomic.AddInt64(&r.count, 1)
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objMeta.SetName(fmt.Sprintf("%s%05d", objMeta.GetGenerateName(), val))
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return false
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}
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// React is noop-function
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func (r *GenerateNameReactor) React(action clientgotesting.Action) (handled bool, ret runtime.Object, err error) {
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return false, nil, nil
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}
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var _ clientgotesting.Reactor = (*GenerateNameReactor)(nil)
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// PrependGenerateNameReactor will instrument a client-go testing Fake
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// with a reactor that simulates 'generateName' functionality
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func PrependGenerateNameReactor(f *clientgotesting.Fake) {
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f.ReactionChain = append([]clientgotesting.Reactor{&GenerateNameReactor{}}, f.ReactionChain...)
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}
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