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/*
Copyright 2015 The Kubernetes 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 discovery_test
import (
"bytes"
"encoding/json"
"errors"
"io"
"net/http"
"strings"
"testing"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/discovery"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/rest/fake"
)
func objBody(object interface{}) io.ReadCloser {
output, err := json.MarshalIndent(object, "", "")
if err != nil {
panic(err)
}
return io.NopCloser(bytes.NewReader([]byte(output)))
}
func TestServerSupportsVersion(t *testing.T) {
tests := []struct {
name string
requiredVersion schema.GroupVersion
serverVersions []string
expectErr func(err error) bool
sendErr error
statusCode int
}{
{
name: "explicit version supported",
requiredVersion: schema.GroupVersion{Version: "v1"},
serverVersions: []string{"/version1", v1.SchemeGroupVersion.String()},
statusCode: http.StatusOK,
},
{
name: "explicit version not supported on server",
requiredVersion: schema.GroupVersion{Version: "v1"},
serverVersions: []string{"version1"},
expectErr: func(err error) bool { return strings.Contains(err.Error(), `server does not support API version "v1"`) },
statusCode: http.StatusOK,
},
{
name: "Status 403 Forbidden for core/v1 group returns error and is unsupported",
requiredVersion: schema.GroupVersion{Version: "v1"},
serverVersions: []string{"/version1", v1.SchemeGroupVersion.String()},
expectErr: func(err error) bool { return strings.Contains(err.Error(), "unknown") },
statusCode: http.StatusForbidden,
},
{
name: "Status 404 Not Found for core/v1 group returns empty and is unsupported",
requiredVersion: schema.GroupVersion{Version: "v1"},
serverVersions: []string{"/version1", v1.SchemeGroupVersion.String()},
expectErr: func(err error) bool {
return strings.Contains(err.Error(), "server could not find the requested resource")
},
statusCode: http.StatusNotFound,
},
{
name: "connection refused error",
serverVersions: []string{"version1"},
sendErr: errors.New("connection refused"),
expectErr: func(err error) bool { return strings.Contains(err.Error(), "connection refused") },
statusCode: http.StatusOK,
},
}
for _, test := range tests {
fakeClient := fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
if test.sendErr != nil {
return nil, test.sendErr
}
header := http.Header{}
header.Set("Content-Type", runtime.ContentTypeJSON)
return &http.Response{StatusCode: test.statusCode, Header: header, Body: objBody(&metav1.APIVersions{Versions: test.serverVersions})}, nil
})
c := discovery.NewDiscoveryClientForConfigOrDie(&restclient.Config{})
c.RESTClient().(*restclient.RESTClient).Client = fakeClient
err := discovery.ServerSupportsVersion(c, test.requiredVersion)
if err == nil && test.expectErr != nil {
t.Errorf("expected error, got nil for [%s].", test.name)
}
if err != nil {
if test.expectErr == nil || !test.expectErr(err) {
t.Errorf("unexpected error for [%s]: %v.", test.name, err)
}
continue
}
}
}
func TestFilteredBy(t *testing.T) {
all := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
return true
})
none := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
return false
})
onlyV2 := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
return strings.HasSuffix(gv, "/v2") || gv == "v2"
})
onlyBar := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
return r.Kind == "Bar"
})
foo := []*metav1.APIResourceList{
{
GroupVersion: "foo/v1",
APIResources: []metav1.APIResource{
{Name: "bar", Kind: "Bar"},
{Name: "test", Kind: "Test"},
},
},
{
GroupVersion: "foo/v2",
APIResources: []metav1.APIResource{
{Name: "bar", Kind: "Bar"},
{Name: "test", Kind: "Test"},
},
},
{
GroupVersion: "foo/v3",
APIResources: []metav1.APIResource{},
},
}
tests := []struct {
input []*metav1.APIResourceList
pred discovery.ResourcePredicate
expectedResources []string
}{
{nil, all, []string{}},
{[]*metav1.APIResourceList{
{GroupVersion: "foo/v1"},
}, all, []string{}},
{foo, all, []string{"foo/v1.bar", "foo/v1.test", "foo/v2.bar", "foo/v2.test"}},
{foo, onlyV2, []string{"foo/v2.bar", "foo/v2.test"}},
{foo, onlyBar, []string{"foo/v1.bar", "foo/v2.bar"}},
{foo, none, []string{}},
}
for i, test := range tests {
filtered := discovery.FilteredBy(test.pred, test.input)
if expected, got := sets.NewString(test.expectedResources...), sets.NewString(stringify(filtered)...); !expected.Equal(got) {
t.Errorf("[%d] unexpected group versions: expected=%v, got=%v", i, test.expectedResources, stringify(filtered))
}
}
}
func stringify(rls []*metav1.APIResourceList) []string {
result := []string{}
for _, rl := range rls {
for _, r := range rl.APIResources {
result = append(result, rl.GroupVersion+"."+r.Name)
}
if len(rl.APIResources) == 0 {
result = append(result, rl.GroupVersion)
}
}
return result
}
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