fixing fake_runner for interface

pkg/drivers/none/none.go

@@ -220,19 +220,22 @@ func (d *Driver) RunSSHCommandFromDriver() error {
 }
 
 // stopKubelet idempotently stops the kubelet
-func stopKubelet(exec command.Runner) error {
+func stopKubelet(cr command.Runner) error {
 	glog.Infof("stopping kubelet.service ...")
 	stop := func() error {
-		cmdStop := "sudo systemctl stop kubelet.service"
-		cmdCheck := "sudo systemctl show -p SubState kubelet"
-		err := exec.Run(cmdStop)
+		cmdStop := command.ExecCmd("sudo systemctl stop kubelet.service")
+		rr, err := cr.RunCmd(cmdStop)
 		if err != nil {
-			glog.Errorf("temporary error for %q : %v", cmdStop, err)
+			glog.Errorf("temporary error for %q : %v", rr.Command(), err)
 		}
+
 		var out bytes.Buffer
-		errStatus := exec.CombinedOutputTo(cmdCheck, &out)
-		if errStatus != nil {
-			glog.Errorf("temporary error: for %q : %v", cmdCheck, errStatus)
+		cmdCheck := command.ExecCmd("sudo systemctl show -p SubState kubelet")
+		cmdCheck.Stdout = &out
+		cmdCheck.Stderr = &out
+		rr, err = cr.RunCmd(cmdCheck)
+		if err != nil {
+			glog.Errorf("temporary error: for %q : %v output: %q", cmdCheck, err, rr.Output())
 		}
 		if !strings.Contains(out.String(), "dead") && !strings.Contains(out.String(), "failed") {
 			return fmt.Errorf("unexpected kubelet state: %q", out)

pkg/minikube/command/fake_runner.go

@@ -54,18 +54,29 @@ func (f *FakeCommandRunner) RunCmd(cmd *exec.Cmd) (*RunResult, error) {
 
 	start := time.Now()
 
-	out, ok := f.cmdMap.Load(cmd.Args)
-	rr.Stderr = bytes.NewBuffer([]byte(out.(string))) // converting fake output string to a buffer
+	out, ok := f.cmdMap.Load(strings.Join(cmd.Args, " "))
+	buf := new(bytes.Buffer) // creating a buffer reader to convert out to rr.stdout
+	outStr := ""
+	if out != nil {
+		outStr = out.(string)
+	}
+	_, err := buf.WriteString(outStr)
+	if err != nil {
+		return rr, errors.Wrap(err, "Writing outStr to FakeCommandRunner's buffer")
+	}
+	rr.Stdout = buf
+	rr.Stderr = buf
 
 	elapsed := time.Since(start)
+
 	if ok {
 		// Reduce log spam
 		if elapsed > (1 * time.Second) {
 			glog.Infof("(FakeCommandRunner) Done: %v: (%s)", rr.Command(), elapsed)
 		}
 	} else {
-		glog.Infof("(FakeCommandRunner) Non-zero exit: %v: (%s)\n%s", rr.Command(), elapsed, rr.Output())
-		return rr, fmt.Errorf("unavailable command: %s", strings.Join(cmd.Args, " "))
+		glog.Infof("(FakeCommandRunner) Non-zero exit: %v: (%s)\n%s", rr.Command(), elapsed, out)
+		return rr, fmt.Errorf("unavailable command: %s", rr.Command())
 	}
 	return rr, nil
 }