kubernetes customcolumn_test 源码
kubernetes customcolumn_test 代码
文件路径：/staging/src/k8s.io/kubectl/pkg/cmd/get/customcolumn_test.go
/*
Copyright 2014 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 get
import (
"bytes"
"reflect"
"strings"
"testing"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/cli-runtime/pkg/printers"
"k8s.io/kubectl/pkg/scheme"
)
// UniversalDecoder call must specify parameter versions; otherwise it will decode to internal versions.
var decoder = scheme.Codecs.UniversalDecoder(scheme.Scheme.PrioritizedVersionsAllGroups()...)
func TestMassageJSONPath(t *testing.T) {
tests := []struct {
input string
expectedOutput string
expectErr bool
}{
{input: "foo.bar", expectedOutput: "{.foo.bar}"},
{input: "{foo.bar}", expectedOutput: "{.foo.bar}"},
{input: ".foo.bar", expectedOutput: "{.foo.bar}"},
{input: "{.foo.bar}", expectedOutput: "{.foo.bar}"},
{input: "", expectedOutput: ""},
{input: "{foo.bar", expectErr: true},
{input: "foo.bar}", expectErr: true},
{input: "{foo.bar}}", expectErr: true},
{input: "{{foo.bar}", expectErr: true},
}
for _, test := range tests {
t.Run(test.input, func(t *testing.T) {
output, err := RelaxedJSONPathExpression(test.input)
if err != nil && !test.expectErr {
t.Errorf("unexpected error: %v", err)
return
}
if test.expectErr {
if err == nil {
t.Error("unexpected non-error")
}
return
}
if output != test.expectedOutput {
t.Errorf("input: %s, expected: %s, saw: %s", test.input, test.expectedOutput, output)
}
})
}
}
func TestNewColumnPrinterFromSpec(t *testing.T) {
tests := []struct {
spec string
expectedColumns []Column
expectErr bool
name string
noHeaders bool
}{
{
spec: "",
expectErr: true,
name: "empty",
},
{
spec: "invalid",
expectErr: true,
name: "invalid1",
},
{
spec: "invalid=foobar",
expectErr: true,
name: "invalid2",
},
{
spec: "invalid,foobar:blah",
expectErr: true,
name: "invalid3",
},
{
spec: "NAME:metadata.name,API_VERSION:apiVersion",
name: "ok",
expectedColumns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
{
Header: "API_VERSION",
FieldSpec: "{.apiVersion}",
},
},
},
{
spec: "API_VERSION:apiVersion",
name: "no-headers",
noHeaders: true,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
printer, err := NewCustomColumnsPrinterFromSpec(test.spec, decoder, test.noHeaders)
if test.expectErr {
if err == nil {
t.Errorf("[%s] unexpected non-error", test.name)
}
return
}
if !test.expectErr && err != nil {
t.Errorf("[%s] unexpected error: %v", test.name, err)
return
}
if test.noHeaders {
buffer := &bytes.Buffer{}
printer.PrintObj(&corev1.Pod{}, buffer)
if err != nil {
t.Fatalf("An error occurred printing Pod: %#v", err)
}
if contains(strings.Fields(buffer.String()), "API_VERSION") {
t.Errorf("unexpected header API_VERSION")
}
} else if !reflect.DeepEqual(test.expectedColumns, printer.Columns) {
t.Errorf("[%s]\nexpected:\n%v\nsaw:\n%v\n", test.name, test.expectedColumns, printer.Columns)
}
})
}
}
func contains(arr []string, s string) bool {
for i := range arr {
if arr[i] == s {
return true
}
}
return false
}
const exampleTemplateOne = `NAME API_VERSION
{metadata.name} {apiVersion}`
const exampleTemplateTwo = `NAME API_VERSION
{metadata.name} {apiVersion}`
func TestNewColumnPrinterFromTemplate(t *testing.T) {
tests := []struct {
spec string
expectedColumns []Column
expectErr bool
name string
}{
{
spec: "",
expectErr: true,
name: "empty",
},
{
spec: "invalid",
expectErr: true,
name: "invalid1",
},
{
spec: "invalid=foobar",
expectErr: true,
name: "invalid2",
},
{
spec: "invalid,foobar:blah",
expectErr: true,
name: "invalid3",
},
{
spec: exampleTemplateOne,
name: "ok",
expectedColumns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
{
Header: "API_VERSION",
FieldSpec: "{.apiVersion}",
},
},
},
{
spec: exampleTemplateTwo,
name: "ok-2",
expectedColumns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
{
Header: "API_VERSION",
FieldSpec: "{.apiVersion}",
},
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
reader := bytes.NewBufferString(test.spec)
printer, err := NewCustomColumnsPrinterFromTemplate(reader, decoder)
if test.expectErr {
if err == nil {
t.Errorf("[%s] unexpected non-error", test.name)
}
return
}
if !test.expectErr && err != nil {
t.Errorf("[%s] unexpected error: %v", test.name, err)
return
}
if !reflect.DeepEqual(test.expectedColumns, printer.Columns) {
t.Errorf("[%s]\nexpected:\n%v\nsaw:\n%v\n", test.name, test.expectedColumns, printer.Columns)
}
})
}
}
func TestColumnPrint(t *testing.T) {
tests := []struct {
columns []Column
obj runtime.Object
expectedOutput string
}{
{
columns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
},
obj: &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
expectedOutput: `NAME
foo
`,
},
{
columns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
},
obj: &corev1.PodList{
Items: []corev1.Pod{
{ObjectMeta: metav1.ObjectMeta{Name: "foo"}},
{ObjectMeta: metav1.ObjectMeta{Name: "bar"}},
},
},
expectedOutput: `NAME
foo
bar
`,
},
{
columns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
{
Header: "API_VERSION",
FieldSpec: "{.apiVersion}",
},
},
obj: &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "foo"}, TypeMeta: metav1.TypeMeta{APIVersion: "baz"}},
expectedOutput: `NAME API_VERSION
foo baz
`,
},
{
columns: []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
{
Header: "API_VERSION",
FieldSpec: "{.apiVersion}",
},
{
Header: "NOT_FOUND",
FieldSpec: "{.notFound}",
},
},
obj: &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "foo"}, TypeMeta: metav1.TypeMeta{APIVersion: "baz"}},
expectedOutput: `NAME API_VERSION NOT_FOUND
foo baz <none>
`,
},
}
for _, test := range tests {
t.Run(test.expectedOutput, func(t *testing.T) {
printer := &CustomColumnsPrinter{
Columns: test.columns,
Decoder: decoder,
}
buffer := &bytes.Buffer{}
if err := printer.PrintObj(test.obj, buffer); err != nil {
t.Errorf("unexpected error: %v", err)
}
if buffer.String() != test.expectedOutput {
t.Errorf("\nexpected:\n'%s'\nsaw\n'%s'\n", test.expectedOutput, buffer.String())
}
})
}
}
// this mimics how resource/get.go calls the customcolumn printer
func TestIndividualPrintObjOnExistingTabWriter(t *testing.T) {
columns := []Column{
{
Header: "NAME",
FieldSpec: "{.metadata.name}",
},
{
Header: "LONG COLUMN NAME", // name is longer than all values of label1
FieldSpec: "{.metadata.labels.label1}",
},
{
Header: "LABEL 2",
FieldSpec: "{.metadata.labels.label2}",
},
}
objects := []*corev1.Pod{
{ObjectMeta: metav1.ObjectMeta{Name: "foo", Labels: map[string]string{"label1": "foo", "label2": "foo"}}},
{ObjectMeta: metav1.ObjectMeta{Name: "bar", Labels: map[string]string{"label1": "bar", "label2": "bar"}}},
}
expectedOutput := `NAME LONG COLUMN NAME LABEL 2
foo foo foo
bar bar bar
`
buffer := &bytes.Buffer{}
tabWriter := printers.GetNewTabWriter(buffer)
printer := &CustomColumnsPrinter{
Columns: columns,
Decoder: decoder,
}
for _, obj := range objects {
if err := printer.PrintObj(obj, tabWriter); err != nil {
t.Errorf("unexpected error: %v", err)
}
}
tabWriter.Flush()
if buffer.String() != expectedOutput {
t.Errorf("\nexpected:\n'%s'\nsaw\n'%s'\n", expectedOutput, buffer.String())
}
}
func TestSliceColumnPrint(t *testing.T) {
pod := &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "fake-name",
Namespace: "fake-namespace",
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{
Name: "fake0",
},
{
Name: "fake1",
},
{
Name: "fake2",
},
{
Name: "fake3",
},
},
},
}
tests := []struct {
name string
spec string
expectedOutput string
expectErr bool
}{
{
name: "containers[0]",
spec: "CONTAINER:.spec.containers[0].name",
expectedOutput: `CONTAINER
fake0
`,
expectErr: false,
},
{
name: "containers[3]",
spec: "CONTAINER:.spec.containers[3].name",
expectedOutput: `CONTAINER
fake3
`,
expectErr: false,
},
{
name: "containers[5], illegal expression because it is out of bounds",
spec: "CONTAINER:.spec.containers[5].name",
expectedOutput: "",
expectErr: true,
},
{
name: "containers[-1], it equals containers[3]",
spec: "CONTAINER:.spec.containers[-1].name",
expectedOutput: `CONTAINER
fake3
`,
expectErr: false,
},
{
name: "containers[-2], it equals containers[2]",
spec: "CONTAINER:.spec.containers[-2].name",
expectedOutput: `CONTAINER
fake2
`,
expectErr: false,
},
{
name: "containers[-4], it equals containers[0]",
spec: "CONTAINER:.spec.containers[-4].name",
expectedOutput: `CONTAINER
fake0
`,
expectErr: false,
},
{
name: "containers[-5], illegal expression because it is out of bounds",
spec: "CONTAINER:.spec.containers[-5].name",
expectedOutput: "",
expectErr: true,
},
{
name: "containers[0:0], it equals empty set",
spec: "CONTAINER:.spec.containers[0:0].name",
expectedOutput: `CONTAINER
<none>
`,
expectErr: false,
},
{
name: "containers[0:3]",
spec: "CONTAINER:.spec.containers[0:3].name",
expectedOutput: `CONTAINER
fake0,fake1,fake2
`,
expectErr: false,
},
{
name: "containers[1:]",
spec: "CONTAINER:.spec.containers[1:].name",
expectedOutput: `CONTAINER
fake1,fake2,fake3
`,
expectErr: false,
},
{
name: "containers[3:1], illegal expression because start index is greater than end index",
spec: "CONTAINER:.spec.containers[3:1].name",
expectedOutput: "",
expectErr: true,
},
{
name: "containers[0:-1], it equals containers[0:3]",
spec: "CONTAINER:.spec.containers[0:-1].name",
expectedOutput: `CONTAINER
fake0,fake1,fake2
`,
expectErr: false,
},
{
name: "containers[-1:], it equals containers[3:]",
spec: "CONTAINER:.spec.containers[-1:].name",
expectedOutput: `CONTAINER
fake3
`,
expectErr: false,
},
{
name: "containers[-4:], it equals containers[0:]",
spec: "CONTAINER:.spec.containers[-4:].name",
expectedOutput: `CONTAINER
fake0,fake1,fake2,fake3
`,
expectErr: false,
},
{
name: "containers[-3:-1], it equasl containers[1:3]",
spec: "CONTAINER:.spec.containers[-3:-1].name",
expectedOutput: `CONTAINER
fake1,fake2
`,
expectErr: false,
},
{
name: "containers[-2:-3], it equals containers[2:1], illegal expression because start index is greater than end index",
spec: "CONTAINER:.spec.containers[-2:-3].name",
expectedOutput: "",
expectErr: true,
},
{
name: "containers[4:4], it equals empty set",
spec: "CONTAINER:.spec.containers[4:4].name",
expectedOutput: `CONTAINER
<none>
`,
expectErr: false,
},
{
name: "containers[-5:-5], it equals empty set",
spec: "CONTAINER:.spec.containers[-5:-5].name",
expectedOutput: `CONTAINER
<none>
`,
expectErr: false,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
printer, err := NewCustomColumnsPrinterFromSpec(test.spec, decoder, false)
if err != nil {
t.Errorf("test %s has unexpected error: %v", test.name, err)
}
buffer := &bytes.Buffer{}
err = printer.PrintObj(pod, buffer)
if test.expectErr {
if err == nil {
t.Errorf("test %s has unexpected error: %v", test.name, err)
}
} else {
if err != nil {
t.Errorf("test %s has unexpected error: %v", test.name, err)
} else if buffer.String() != test.expectedOutput {
t.Errorf("test %s has unexpected output:\nexpected: %s\nsaw: %s", test.name, test.expectedOutput, buffer.String())
}
}
})
}
}
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