added vendors

vendor/k8s.io/client-go/tools/pager/pager_test.go

@@ -0,0 +1,206 @@
+/*
+Copyright 2017 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 pager
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"golang.org/x/net/context"
+	"k8s.io/apimachinery/pkg/api/errors"
+	metainternalversion "k8s.io/apimachinery/pkg/apis/meta/internalversion"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+func list(count int, rv string) *metainternalversion.List {
+	var list metainternalversion.List
+	for i := 0; i < count; i++ {
+		list.Items = append(list.Items, &metav1beta1.PartialObjectMetadata{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: fmt.Sprintf("%d", i),
+			},
+		})
+	}
+	list.ResourceVersion = rv
+	return &list
+}
+
+type testPager struct {
+	t          *testing.T
+	rv         string
+	index      int
+	remaining  int
+	last       int
+	continuing bool
+	done       bool
+	expectPage int64
+}
+
+func (p *testPager) reset() {
+	p.continuing = false
+	p.remaining += p.index
+	p.index = 0
+	p.last = 0
+	p.done = false
+}
+
+func (p *testPager) PagedList(ctx context.Context, options metav1.ListOptions) (runtime.Object, error) {
+	if p.done {
+		p.t.Errorf("did not expect additional call to paged list")
+		return nil, fmt.Errorf("unexpected list call")
+	}
+	expectedContinue := fmt.Sprintf("%s:%d", p.rv, p.last)
+	if options.Limit != p.expectPage || (p.continuing && options.Continue != expectedContinue) {
+		p.t.Errorf("invariant violated, expected limit %d and continue %s, got %#v", p.expectPage, expectedContinue, options)
+		return nil, fmt.Errorf("invariant violated")
+	}
+	var list metainternalversion.List
+	total := options.Limit
+	if total == 0 {
+		total = int64(p.remaining)
+	}
+	for i := int64(0); i < total; i++ {
+		if p.remaining <= 0 {
+			break
+		}
+		list.Items = append(list.Items, &metav1beta1.PartialObjectMetadata{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: fmt.Sprintf("%d", p.index),
+			},
+		})
+		p.remaining--
+		p.index++
+	}
+	p.last = p.index
+	if p.remaining > 0 {
+		list.Continue = fmt.Sprintf("%s:%d", p.rv, p.last)
+		p.continuing = true
+	} else {
+		p.done = true
+	}
+	list.ResourceVersion = p.rv
+	return &list, nil
+}
+
+func (p *testPager) ExpiresOnSecondPage(ctx context.Context, options metav1.ListOptions) (runtime.Object, error) {
+	if p.continuing {
+		p.done = true
+		return nil, errors.NewResourceExpired("this list has expired")
+	}
+	return p.PagedList(ctx, options)
+}
+
+func (p *testPager) ExpiresOnSecondPageThenFullList(ctx context.Context, options metav1.ListOptions) (runtime.Object, error) {
+	if p.continuing {
+		p.reset()
+		p.expectPage = 0
+		return nil, errors.NewResourceExpired("this list has expired")
+	}
+	return p.PagedList(ctx, options)
+}
+
+func TestListPager_List(t *testing.T) {
+	type fields struct {
+		PageSize          int64
+		PageFn            ListPageFunc
+		FullListIfExpired bool
+	}
+	type args struct {
+		ctx     context.Context
+		options metav1.ListOptions
+	}
+	tests := []struct {
+		name      string
+		fields    fields
+		args      args
+		want      runtime.Object
+		wantErr   bool
+		isExpired bool
+	}{
+		{
+			name:   "empty page",
+			fields: fields{PageSize: 10, PageFn: (&testPager{t: t, expectPage: 10, remaining: 0, rv: "rv:20"}).PagedList},
+			args:   args{},
+			want:   list(0, "rv:20"),
+		},
+		{
+			name:   "one page",
+			fields: fields{PageSize: 10, PageFn: (&testPager{t: t, expectPage: 10, remaining: 9, rv: "rv:20"}).PagedList},
+			args:   args{},
+			want:   list(9, "rv:20"),
+		},
+		{
+			name:   "one full page",
+			fields: fields{PageSize: 10, PageFn: (&testPager{t: t, expectPage: 10, remaining: 10, rv: "rv:20"}).PagedList},
+			args:   args{},
+			want:   list(10, "rv:20"),
+		},
+		{
+			name:   "two pages",
+			fields: fields{PageSize: 10, PageFn: (&testPager{t: t, expectPage: 10, remaining: 11, rv: "rv:20"}).PagedList},
+			args:   args{},
+			want:   list(11, "rv:20"),
+		},
+		{
+			name:   "three pages",
+			fields: fields{PageSize: 10, PageFn: (&testPager{t: t, expectPage: 10, remaining: 21, rv: "rv:20"}).PagedList},
+			args:   args{},
+			want:   list(21, "rv:20"),
+		},
+		{
+			name:      "expires on second page",
+			fields:    fields{PageSize: 10, PageFn: (&testPager{t: t, expectPage: 10, remaining: 21, rv: "rv:20"}).ExpiresOnSecondPage},
+			args:      args{},
+			wantErr:   true,
+			isExpired: true,
+		},
+		{
+			name: "expires on second page and then lists",
+			fields: fields{
+				FullListIfExpired: true,
+				PageSize:          10,
+				PageFn:            (&testPager{t: t, expectPage: 10, remaining: 21, rv: "rv:20"}).ExpiresOnSecondPageThenFullList,
+			},
+			args: args{},
+			want: list(21, "rv:20"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			p := &ListPager{
+				PageSize:          tt.fields.PageSize,
+				PageFn:            tt.fields.PageFn,
+				FullListIfExpired: tt.fields.FullListIfExpired,
+			}
+			got, err := p.List(tt.args.ctx, tt.args.options)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ListPager.List() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if tt.isExpired != errors.IsResourceExpired(err) {
+				t.Errorf("ListPager.List() error = %v, isExpired %v", err, tt.isExpired)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("ListPager.List() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}