feat(helm): add init cmd and test

cmd/helm/init.go

 package main
 
 import (
+	"errors"
 	"fmt"
 
 	"github.com/spf13/cobra"
@@ -14,9 +15,11 @@ var initCmd = &cobra.Command{
 	Use:   "init",
 	Short: "Initialize Helm on both client and server.",
 	Long:  `Add long help here`,
-	Run:   runInit,
+	RunE:  RunInit,
 }
 
-func runInit(cmd *cobra.Command, args []string) {
+// RunInit initializes local config and installs tiller to Kubernetes Cluster
+func RunInit(cmd *cobra.Command, args []string) error {
 	fmt.Fprintln(stdout, "Init was called.")
+	return errors.New("NotImplemented")
 }

cmd/helm/init_test.go

+package main
+
+import (
+	"testing"
+)
+
+func TestRunInit(t *testing.T) {
+
+	//TODO: call command and make sure no error is recevied
+	err := RunInit(initCmd, nil)
+	if err != nil {
+		t.Errorf("Expected no error but got one: %s", err)
+	}
+}