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conformance: do not parse resourceVersion

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This test wishes to observe a watch event. In order to do this in the
past, the test chose a well-known `Service` object, fetched it, and did
arithmetic on the returned `resourceVersion` in order to start a watch
that was guaranteed to see an event. It is not valid to parse the
`resourceVersion` as an integer or to do arithmetic on it, so in order
to make the test conformant to an appropriate use of the API it now:

 - creates a namespace
 - fetches the current `resourceVersion`
 - creates an object
 - watches from the previous `resourceVersion` that was read

This ensures that an event is seen by the watch, but uses the publically
supported API.

`ConfigMap`s are used instead of `Service`s as they do not require a
valid `spec` for creation and make the test terser.

Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>
This commit is contained in:
Steve Kuznetsov 2022-03-10 09:15:47 -08:00
parent e9af399147
commit 305652a432
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GPG Key ID: 8821C29EC988D9B4
1 changed files with 18 additions and 7 deletions
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25
test/e2e/apimachinery/protocol.go
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@ -19,13 +19,14 @@ package apimachinery
import (
"context"
"fmt"
"strconv"
g "github.com/onsi/ginkgo"
o "github.com/onsi/gomega"
v1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/kubernetes"
@ -34,7 +35,6 @@ import (
var _ = SIGDescribe("client-go should negotiate", func() {
f := framework.NewDefaultFramework("protocol")
f.SkipNamespaceCreation = true
for _, s := range []string{
"application/json",
@ -44,17 +44,28 @@ var _ = SIGDescribe("client-go should negotiate", func() {
} {
accept := s
g.It(fmt.Sprintf("watch and report errors with accept %q", accept), func() {
g.By("creating an object for which we will watch")
ns := f.Namespace.Name
client := f.ClientSet.CoreV1().ConfigMaps(ns)
configMapName := "e2e-client-go-test-negotiation"
testConfigMap := &v1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: configMapName}}
before, err := client.List(context.TODO(), metav1.ListOptions{})
framework.ExpectNoError(err)
_, err = client.Create(context.TODO(), testConfigMap, metav1.CreateOptions{})
framework.ExpectNoError(err)
opts := metav1.ListOptions{
ResourceVersion: before.ResourceVersion,
FieldSelector: fields.SelectorFromSet(fields.Set{"metadata.name": configMapName}).String(),
}
g.By("watching for changes on the object")
cfg, err := framework.LoadConfig()
framework.ExpectNoError(err)
cfg.AcceptContentTypes = accept
c := kubernetes.NewForConfigOrDie(cfg)
svcs, err := c.CoreV1().Services("default").Get(context.TODO(), "kubernetes", metav1.GetOptions{})
framework.ExpectNoError(err)
rv, err := strconv.Atoi(svcs.ResourceVersion)
framework.ExpectNoError(err)
w, err := c.CoreV1().Services("default").Watch(context.TODO(), metav1.ListOptions{ResourceVersion: strconv.Itoa(rv - 1)})
w, err := c.CoreV1().ConfigMaps(ns).Watch(context.TODO(), opts)
framework.ExpectNoError(err)
defer w.Stop()