kubernetes/pkg/kubectl/cmd/config/unset_test.go

/*
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 config

import (
	"bytes"
	"io/ioutil"
	"os"
	"testing"

	"k8s.io/client-go/tools/clientcmd"
	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)

type unsetConfigTest struct {
	description string
	config      clientcmdapi.Config //initiate kubectl config
	args        []string            //kubectl config unset args
	expected    string              //expect out
}

func TestUnsetConfigString(t *testing.T) {
	conf := clientcmdapi.Config{
		Kind:       "Config",
		APIVersion: "v1",
		Clusters: map[string]*clientcmdapi.Cluster{
			"minikube":   {Server: "https://192.168.99.100:8443"},
			"my-cluster": {Server: "https://192.168.0.1:3434"},
		},
		Contexts: map[string]*clientcmdapi.Context{
			"minikube":   {AuthInfo: "minikube", Cluster: "minikube"},
			"my-cluster": {AuthInfo: "mu-cluster", Cluster: "my-cluster"},
		},
		CurrentContext: "minikube",
	}
	test := unsetConfigTest{
		description: "Testing for kubectl config unset a value",
		config:      conf,
		args:        []string{"current-context"},
		expected:    `Property "current-context" unset.` + "\n",
	}
	test.run(t)
}

func TestUnsetConfigMap(t *testing.T) {
	conf := clientcmdapi.Config{
		Kind:       "Config",
		APIVersion: "v1",
		Clusters: map[string]*clientcmdapi.Cluster{
			"minikube":   {Server: "https://192.168.99.100:8443"},
			"my-cluster": {Server: "https://192.168.0.1:3434"},
		},
		Contexts: map[string]*clientcmdapi.Context{
			"minikube":   {AuthInfo: "minikube", Cluster: "minikube"},
			"my-cluster": {AuthInfo: "mu-cluster", Cluster: "my-cluster"},
		},
		CurrentContext: "minikube",
	}
	test := unsetConfigTest{
		description: "Testing for kubectl config unset a map",
		config:      conf,
		args:        []string{"clusters"},
		expected:    `Property "clusters" unset.` + "\n",
	}
	test.run(t)
}

func (test unsetConfigTest) run(t *testing.T) {
	fakeKubeFile, err := ioutil.TempFile(os.TempDir(), "")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	defer os.Remove(fakeKubeFile.Name())
	err = clientcmd.WriteToFile(test.config, fakeKubeFile.Name())
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	pathOptions := clientcmd.NewDefaultPathOptions()
	pathOptions.GlobalFile = fakeKubeFile.Name()
	pathOptions.EnvVar = ""
	buf := bytes.NewBuffer([]byte{})
	cmd := NewCmdConfigUnset(buf, pathOptions)
	cmd.SetArgs(test.args)
	if err := cmd.Execute(); err != nil {
		t.Fatalf("unexpected error executing command: %v,kubectl unset args: %v", err, test.args)
	}
	config, err := clientcmd.LoadFromFile(fakeKubeFile.Name())
	if err != nil {
		t.Fatalf("unexpected error loading kubeconfig file: %v", err)
	}
	if len(test.expected) != 0 {
		if buf.String() != test.expected {
			t.Errorf("Failed in :%q\n expected %v\n but got %v", test.description, test.expected, buf.String())
		}
	}
	if test.args[0] == "current-context" {
		if config.CurrentContext != "" {
			t.Errorf("Failed in :%q\n expected current-context nil,but got %v", test.description, config.CurrentContext)
		}
	} else if test.args[0] == "clusters" {
		if len(config.Clusters) != 0 {
			t.Errorf("Failed in :%q\n expected clusters nil map, but got %v", test.description, config.Clusters)
		}
	}
}