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check_test.go
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check_test.go
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// Copyright 2018 Istio 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 check
import (
"fmt"
"testing"
"time"
"github.com/pkg/errors"
"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
kube_meta "istio.io/istio/galley/pkg/metadata/kube"
sourceSchema "istio.io/istio/galley/pkg/source/kube/schema"
extfake "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/fake"
meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func TestCheckCRDPresence(t *testing.T) {
prevInterval, prevTimeout := pollInterval, pollTimeout
pollInterval = time.Nanosecond
pollTimeout = time.Millisecond
defer func() {
pollInterval, pollTimeout = prevInterval, prevTimeout
}()
specs := kube_meta.Types.All()
cases := []struct {
name string
missing map[int]bool
wantErr bool
}{
{
name: "all present",
wantErr: false,
},
{
name: "none ready",
missing: func() map[int]bool {
m := make(map[int]bool)
for i := 0; i < len(specs); i++ {
m[i] = true
}
return m
}(),
wantErr: true,
},
{
name: "first missing",
missing: map[int]bool{0: true},
wantErr: true,
},
{
name: "middle not ready",
missing: map[int]bool{(len(specs) / 2): true},
wantErr: true,
},
{
name: "last not ready",
missing: map[int]bool{(len(specs) - 1): true},
wantErr: true,
},
}
for i, c := range cases {
t.Run(fmt.Sprintf("[%v] %v", i, c.name), func(tt *testing.T) {
cs := extfake.NewSimpleClientset()
byGroupVersion := map[string][]meta_v1.APIResource{}
for i, spec := range specs {
if c.missing[i] {
continue
}
gv := spec.GroupVersion().String()
byGroupVersion[gv] = append(byGroupVersion[gv], meta_v1.APIResource{Name: spec.Plural})
}
for gv, resources := range byGroupVersion {
resourceList := &meta_v1.APIResourceList{
GroupVersion: gv,
APIResources: resources,
}
cs.Resources = append(cs.Resources, resourceList)
}
err := resourceTypesPresence(cs, specs)
if c.wantErr {
if err == nil {
tt.Fatal("expected error but got success")
}
} else {
if err != nil {
tt.Fatalf("expected success but got error: %v", err)
}
}
})
}
}
func TestFindSupportedResourceSchemas(t *testing.T) {
specs := kube_meta.Types.All()
cases := []struct {
name string
missing map[int]bool
}{
{
name: "all present",
},
{
name: "none ready",
missing: func() map[int]bool {
m := make(map[int]bool)
for i := 0; i < len(specs); i++ {
m[i] = true
}
return m
}(),
},
{
name: "first missing",
missing: map[int]bool{0: true},
},
{
name: "middle not ready",
missing: map[int]bool{(len(specs) / 2): true},
},
{
name: "last not ready",
missing: map[int]bool{(len(specs) - 1): true},
},
}
for i, c := range cases {
t.Run(fmt.Sprintf("[%v] %v", i, c.name), func(tt *testing.T) {
cs := extfake.NewSimpleClientset()
byGroupVersion := map[string][]meta_v1.APIResource{}
for i, spec := range specs {
if c.missing[i] {
continue
}
gv := spec.GroupVersion().String()
byGroupVersion[gv] = append(byGroupVersion[gv], meta_v1.APIResource{Name: spec.Plural})
}
for gv, resources := range byGroupVersion {
resourceList := &meta_v1.APIResourceList{
GroupVersion: gv,
APIResources: resources,
}
cs.Resources = append(cs.Resources, resourceList)
}
var want []sourceSchema.ResourceSpec
for j, spec := range specs {
if !c.missing[j] {
want = append(want, spec)
}
}
got := findSupportedResourceSchemas(cs, specs)
if len(got) != len(want) {
tt.Fatalf("wrong number of resource schemas found: \n got %v\nwant %v", got, want)
}
for j := range got {
if got[j].CanonicalResourceName() != want[j].CanonicalResourceName() {
tt.Fatalf("wrong resource found: got %v want %v", got[j], want[j])
}
}
})
}
}
type mockExtensionClient struct{ err error }
func (m mockExtensionClient) DynamicInterface() (dynamic.Interface, error) { return nil, m.err }
func (m mockExtensionClient) APIExtensionsClientset() (clientset.Interface, error) { return nil, m.err }
func (m mockExtensionClient) KubeClient() (kubernetes.Interface, error) { return nil, m.err }
func TestExportedFunctions(t *testing.T) {
var m mockExtensionClient
// provide an empty list of specs so the calling code doesn't
// invoke the mockExtensionClient's unimplemented discovery API. Those
// functions are tested covered by TestCheckCRDPresence and TestFindSupportedResourceSchemas
var emptySpecs []sourceSchema.ResourceSpec
if got := ResourceTypesPresence(m, emptySpecs); got != nil {
t.Errorf("ResourceTypesPresence() returned unexpected error: %v", got)
}
if _, got := FindSupportedResourceSchemas(m, emptySpecs); got != nil {
t.Errorf("FindSupportedResourceSchemas() returned unexpected error: %v", got)
}
m.err = errors.New("oops")
if got := ResourceTypesPresence(m, emptySpecs); got == nil {
t.Error("ResourceTypesPresence() returned unexpected success")
}
if _, got := FindSupportedResourceSchemas(m, emptySpecs); got == nil {
t.Errorf("FindSupportedResourceSchemas() returned unexpected success")
}
}