func TestSetCurrentContext(t *testing.T) {
	expectedConfig := newRedFederalCowHammerConfig()
	startingConfig := newRedFederalCowHammerConfig()

	newContextName := "the-new-context"

	startingConfig.Contexts[newContextName] = clientcmdapi.NewContext()
	expectedConfig.Contexts[newContextName] = clientcmdapi.NewContext()

	expectedConfig.CurrentContext = newContextName

	test := configCommandTest{
		args:           []string{"use-context", "the-new-context"},
		startingConfig: startingConfig,
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

func TestNewEmptyContext(t *testing.T) {
	expectedConfig := *clientcmdapi.NewConfig()
	expectedConfig.Contexts["new-context"] = *clientcmdapi.NewContext()
	test := configCommandTest{
		args:           []string{"set-context", "new-context"},
		startingConfig: *clientcmdapi.NewConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

func TestSetIntoNewConfig(t *testing.T) {
	expectedConfig := *clientcmdapi.NewConfig()
	context := clientcmdapi.NewContext()
	context.AuthInfo = "fake-user"
	expectedConfig.Contexts["new-context"] = *context
	test := configCommandTest{
		args:           []string{"set", "contexts.new-context.user", "fake-user"},
		startingConfig: *clientcmdapi.NewConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

func TestOverwriteExistingContext(t *testing.T) {
	expectedConfig := newRedFederalCowHammerConfig()
	context := *clientcmdapi.NewContext()
	context.Cluster = "clustername"
	expectedConfig.Contexts["federal-context"] = context

	test := configCommandTest{
		args:           []string{"set-context", "federal-context", "--" + clientcmd.FlagClusterName + "=clustername"},
		startingConfig: newRedFederalCowHammerConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

// CreateConfig takes a clientCfg and builds a config (kubeconfig style) from it.
func CreateConfig(namespace string, clientCfg *client.Config) (*clientcmdapi.Config, error) {
	clusterNick, err := GetClusterNicknameFromConfig(clientCfg)
	if err != nil {
		return nil, err
	}

	userNick, err := GetUserNicknameFromConfig(clientCfg)
	if err != nil {
		return nil, err
	}

	contextNick, err := GetContextNicknameFromConfig(namespace, clientCfg)
	if err != nil {
		return nil, err
	}

	config := clientcmdapi.NewConfig()

	credentials := clientcmdapi.NewAuthInfo()
	credentials.Token = clientCfg.BearerToken
	credentials.ClientCertificate = clientCfg.TLSClientConfig.CertFile
	if len(credentials.ClientCertificate) == 0 {
		credentials.ClientCertificateData = clientCfg.TLSClientConfig.CertData
	}
	credentials.ClientKey = clientCfg.TLSClientConfig.KeyFile
	if len(credentials.ClientKey) == 0 {
		credentials.ClientKeyData = clientCfg.TLSClientConfig.KeyData
	}
	config.AuthInfos[userNick] = credentials

	cluster := clientcmdapi.NewCluster()
	cluster.Server = clientCfg.Host
	cluster.CertificateAuthority = clientCfg.CAFile
	if len(cluster.CertificateAuthority) == 0 {
		cluster.CertificateAuthorityData = clientCfg.CAData
	}
	cluster.InsecureSkipTLSVerify = clientCfg.Insecure
	cluster.APIVersion = clientCfg.Version
	config.Clusters[clusterNick] = cluster

	context := clientcmdapi.NewContext()
	context.Cluster = clusterNick
	context.AuthInfo = userNick
	context.Namespace = namespace
	config.Contexts[contextNick] = context
	config.CurrentContext = contextNick

	return config, nil
}

func TestAdditionalContext(t *testing.T) {
	expectedConfig := newRedFederalCowHammerConfig()
	context := *clientcmdapi.NewContext()
	context.Cluster = "some-cluster"
	context.AuthInfo = "some-user"
	context.Namespace = "different-namespace"
	expectedConfig.Contexts["different-context"] = context
	test := configCommandTest{
		args:           []string{"set-context", "different-context", "--" + clientcmd.FlagClusterName + "=some-cluster", "--" + clientcmd.FlagAuthInfoName + "=some-user", "--" + clientcmd.FlagNamespace + "=different-namespace"},
		startingConfig: newRedFederalCowHammerConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

// MergeConfig adds the additional Config stanzas to the startingConfig.  It blindly stomps clusters and users, but
// it searches for a matching context before writing a new one.
func MergeConfig(startingConfig, addition clientcmdapi.Config) (*clientcmdapi.Config, error) {
	ret := startingConfig

	for requestedKey, value := range addition.Clusters {
		ret.Clusters[requestedKey] = value
	}

	for requestedKey, value := range addition.AuthInfos {
		ret.AuthInfos[requestedKey] = value
	}

	requestedContextNamesToActualContextNames := map[string]string{}
	for requestedKey, newContext := range addition.Contexts {
		actualContext := clientcmdapi.NewContext()
		actualContext.AuthInfo = newContext.AuthInfo
		actualContext.Cluster = newContext.Cluster
		actualContext.Namespace = newContext.Namespace
		actualContext.Extensions = newContext.Extensions

		if existingName := FindExistingContextName(startingConfig, *actualContext); len(existingName) > 0 {
			// if this already exists, just move to the next, our job is done
			requestedContextNamesToActualContextNames[requestedKey] = existingName
			continue
		}

		requestedContextNamesToActualContextNames[requestedKey] = requestedKey
		ret.Contexts[requestedKey] = actualContext
	}

	if len(addition.CurrentContext) > 0 {
		if newCurrentContext, exists := requestedContextNamesToActualContextNames[addition.CurrentContext]; exists {
			ret.CurrentContext = newCurrentContext
		} else {
			ret.CurrentContext = addition.CurrentContext
		}
	}

	return &ret, nil
}

func (o createContextOptions) run() error {
	err := o.validate()
	if err != nil {
		return err
	}

	config, err := o.configAccess.GetStartingConfig()
	if err != nil {
		return err
	}

	startingStanza, exists := config.Contexts[o.name]
	if !exists {
		startingStanza = clientcmdapi.NewContext()
	}
	context := o.modifyContext(*startingStanza)
	config.Contexts[o.name] = &context

	if err := ModifyConfig(o.configAccess, *config, true); err != nil {
		return err
	}

	return nil
}

//.........这里部分代码省略.........
		},
		func(in *[]NamedAuthInfo, out *map[string]*api.AuthInfo, s conversion.Scope) error {
			for _, curr := range *in {
				newAuthInfo := api.NewAuthInfo()
				if err := s.Convert(&curr.AuthInfo, newAuthInfo, 0); err != nil {
					return err
				}
				(*out)[curr.Name] = newAuthInfo
			}

			return nil
		},
		func(in *map[string]*api.AuthInfo, out *[]NamedAuthInfo, s conversion.Scope) error {
			allKeys := make([]string, 0, len(*in))
			for key := range *in {
				allKeys = append(allKeys, key)
			}
			sort.Strings(allKeys)

			for _, key := range allKeys {
				newAuthInfo := (*in)[key]
				oldAuthInfo := &AuthInfo{}
				if err := s.Convert(newAuthInfo, oldAuthInfo, 0); err != nil {
					return err
				}

				namedAuthInfo := NamedAuthInfo{key, *oldAuthInfo}
				*out = append(*out, namedAuthInfo)
			}

			return nil
		},
		func(in *[]NamedContext, out *map[string]*api.Context, s conversion.Scope) error {
			for _, curr := range *in {
				newContext := api.NewContext()
				if err := s.Convert(&curr.Context, newContext, 0); err != nil {
					return err
				}
				(*out)[curr.Name] = newContext
			}

			return nil
		},
		func(in *map[string]*api.Context, out *[]NamedContext, s conversion.Scope) error {
			allKeys := make([]string, 0, len(*in))
			for key := range *in {
				allKeys = append(allKeys, key)
			}
			sort.Strings(allKeys)

			for _, key := range allKeys {
				newContext := (*in)[key]
				oldContext := &Context{}
				if err := s.Convert(newContext, oldContext, 0); err != nil {
					return err
				}

				namedContext := NamedContext{key, *oldContext}
				*out = append(*out, namedContext)
			}

			return nil
		},
		func(in *[]NamedExtension, out *map[string]*runtime.EmbeddedObject, s conversion.Scope) error {
			for _, curr := range *in {
				newExtension := &runtime.EmbeddedObject{}
				if err := s.Convert(&curr.Extension, newExtension, 0); err != nil {
					return err
				}
				(*out)[curr.Name] = newExtension
			}

			return nil
		},
		func(in *map[string]*runtime.EmbeddedObject, out *[]NamedExtension, s conversion.Scope) error {
			allKeys := make([]string, 0, len(*in))
			for key := range *in {
				allKeys = append(allKeys, key)
			}
			sort.Strings(allKeys)

			for _, key := range allKeys {
				newExtension := (*in)[key]
				oldExtension := &runtime.RawExtension{}
				if err := s.Convert(newExtension, oldExtension, 0); err != nil {
					return err
				}

				namedExtension := NamedExtension{key, *oldExtension}
				*out = append(*out, namedExtension)
			}

			return nil
		},
	)
	if err != nil {
		// If one of the conversion functions is malformed, detect it immediately.
		panic(err)
	}
}