Add kubectl config current-context

pkg/kubectl/cmd/config/current_context_test.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2014 The Kubernetes Authors All rights reserved.
+
+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"
+	"strings"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
+	clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
+)
+
+type currentContextTest struct {
+	startingConfig clientcmdapi.Config
+	expectedError  string
+}
+
+func newFederalContextConfig() clientcmdapi.Config {
+	return clientcmdapi.Config{
+		CurrentContext: "federal-context",
+	}
+}
+
+func TestCurrentContextWithSetContext(t *testing.T) {
+	test := currentContextTest{
+		startingConfig: newFederalContextConfig(),
+		expectedError:  "",
+	}
+
+	test.run(t)
+}
+
+func TestCurrentContextWithUnsetContext(t *testing.T) {
+	test := currentContextTest{
+		startingConfig: *clientcmdapi.NewConfig(),
+		expectedError:  "current-context is not set",
+	}
+
+	test.run(t)
+}
+
+func (test currentContextTest) run(t *testing.T) {
+	fakeKubeFile, _ := ioutil.TempFile("", "")
+	defer os.Remove(fakeKubeFile.Name())
+	err := clientcmd.WriteToFile(test.startingConfig, fakeKubeFile.Name())
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	pathOptions := NewDefaultPathOptions()
+	pathOptions.GlobalFile = fakeKubeFile.Name()
+	options := CurrentContextOptions{
+		ConfigAccess: pathOptions,
+	}
+
+	buf := bytes.NewBuffer([]byte{})
+	err = RunCurrentContext(buf, []string{}, &options)
+	if len(test.expectedError) != 0 {
+		if err == nil {
+			t.Errorf("Did not get %v", test.expectedError)
+		} else {
+			if !strings.Contains(err.Error(), test.expectedError) {
+				t.Errorf("Expected %v, but got %v", test.expectedError, err)
+			}
+		}
+		return
+	}
+
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}