/
testing.go
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/
testing.go
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// Copyright 2022 OnMetal 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 testing
import (
"context"
"math/rand"
"strings"
"sync"
"time"
"github.com/onsi/ginkgo/v2"
"github.com/onsi/gomega"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type DelegatingContext struct {
lock sync.RWMutex
ctx context.Context
}
func (d *DelegatingContext) Deadline() (deadline time.Time, ok bool) {
d.lock.RLock()
defer d.lock.RUnlock()
return d.ctx.Deadline()
}
func (d *DelegatingContext) Done() <-chan struct{} {
d.lock.RLock()
defer d.lock.RUnlock()
return d.ctx.Done()
}
func (d *DelegatingContext) Err() error {
d.lock.RLock()
defer d.lock.RUnlock()
return d.ctx.Err()
}
func (d *DelegatingContext) Value(key interface{}) interface{} {
d.lock.RLock()
defer d.lock.RUnlock()
return d.ctx.Value(key)
}
func (d *DelegatingContext) Fulfill(ctx context.Context) {
d.lock.Lock()
defer d.lock.Unlock()
d.ctx = ctx
}
func NewDelegatingContext(ctx context.Context) *DelegatingContext {
return &DelegatingContext{ctx: ctx}
}
func SetupContext() context.Context {
initCtx, initCancel := context.WithCancel(context.Background())
delegCtx := NewDelegatingContext(initCtx)
ginkgo.BeforeEach(func() {
ctx, cancel := context.WithCancel(context.Background())
ginkgo.DeferCleanup(cancel)
delegCtx.Fulfill(ctx)
if initCancel != nil {
initCancel()
initCancel = nil
}
})
return delegCtx
}
// LowerCaseAlphabetCharset is a charset consisting of lower-case alphabet letters.
const LowerCaseAlphabetCharset = "abcdefghijklmnopqrstuvwxyz"
// RandomStringOptions are options for RandomString.
type RandomStringOptions struct {
// Charset overrides the default RandomString charset if non-empty.
Charset string
}
// ApplyToRandomString implements RandomStringOption.
func (o *RandomStringOptions) ApplyToRandomString(o2 *RandomStringOptions) {
if o.Charset != "" {
o2.Charset = o.Charset
}
}
// ApplyOptions applies the slice of RandomStringOption to the RandomStringOptions.
func (o *RandomStringOptions) ApplyOptions(opts []RandomStringOption) {
for _, opt := range opts {
opt.ApplyToRandomString(o)
}
}
// RandomStringOption is an option to RandomString.
type RandomStringOption interface {
// ApplyToRandomString modifies the given RandomStringOptions with the option settings.
ApplyToRandomString(o *RandomStringOptions)
}
// Charset specifies an explicit charset to use.
type Charset string
// ApplyToRandomString implements RandomStringOption.
func (s Charset) ApplyToRandomString(o *RandomStringOptions) {
o.Charset = string(s)
}
// RandomString generates a random string of length n with the given options.
// If n is negative, RandomString panics.
func RandomString(n int, opts ...RandomStringOption) string {
if n < 0 {
panic("RandomString: negative length")
}
o := RandomStringOptions{}
o.ApplyOptions(opts)
charset := o.Charset
if charset == "" {
charset = LowerCaseAlphabetCharset
}
var sb strings.Builder
for i := 0; i < n; i++ {
sb.WriteRune(rune(charset[rand.Intn(len(charset))]))
}
return sb.String()
}
// SetupNamespace sets up a namespace before each test and tears the namespace down after each test.
func SetupNamespace(c *client.Client) *corev1.Namespace {
ns := &corev1.Namespace{}
ginkgo.BeforeEach(func(ctx ginkgo.SpecContext) {
*ns = corev1.Namespace{
ObjectMeta: metav1.ObjectMeta{
GenerateName: "test-ns-",
},
}
gomega.Expect((*c).Create(ctx, ns)).To(gomega.Succeed())
ginkgo.DeferCleanup(func(ctx context.Context) error {
return client.IgnoreNotFound((*c).Delete(ctx, ns))
})
})
return ns
}