func (s *LoginCommandSuite) run(c *gc.C, stdin string, args ...string) (*cmd.Context, juju.NewAPIConnectionParams, error) {
	var argsOut juju.NewAPIConnectionParams
	cmd, _ := user.NewLoginCommandForTest(func(args juju.NewAPIConnectionParams) (user.LoginAPI, user.ConnectionAPI, error) {
		argsOut = args
		// The account details are modified in place, so take a copy.
		accountDetails := *argsOut.AccountDetails
		argsOut.AccountDetails = &accountDetails
		if s.loginErr != nil {
			err := s.loginErr
			s.loginErr = nil
			return nil, nil, err
		}
		return s.mockAPI, s.mockAPI, nil
	}, s.store)
	ctx := coretesting.Context(c)
	if stdin == "" {
		stdin = "sekrit\n"
	}
	ctx.Stdin = strings.NewReader(stdin)
	err := coretesting.InitCommand(cmd, args)
	if err != nil {
		return nil, argsOut, err
	}
	err = cmd.Run(ctx)
	return ctx, argsOut, err
}

func newAPIConnectionFromNames(
	c *gc.C,
	controller, account, model string,
	store jujuclient.ClientStore,
	apiOpen api.OpenFunc,
	getBootstrapConfig func(string) (*config.Config, error),
) (api.Connection, error) {
	params := juju.NewAPIConnectionParams{
		Store:           store,
		ControllerName:  controller,
		BootstrapConfig: getBootstrapConfig,
		DialOpts:        api.DefaultDialOpts(),
	}
	if account != "" {
		accountDetails, err := store.AccountByName(controller, account)
		c.Assert(err, jc.ErrorIsNil)
		params.AccountDetails = accountDetails
	}
	if model != "" {
		modelDetails, err := store.ModelByName(controller, account, model)
		c.Assert(err, jc.ErrorIsNil)
		params.ModelUUID = modelDetails.ModelUUID
	}
	return juju.NewAPIFromStore(params, apiOpen)
}

func newAPIConnectionFromNames(
	c *gc.C,
	controller, model string,
	store jujuclient.ClientStore,
	apiOpen api.OpenFunc,
) (api.Connection, error) {
	params := juju.NewAPIConnectionParams{
		Store:          store,
		ControllerName: controller,
		DialOpts:       api.DefaultDialOpts(),
		OpenAPI:        apiOpen,
	}
	accountDetails, err := store.AccountDetails(controller)
	if !errors.IsNotFound(err) {
		c.Assert(err, jc.ErrorIsNil)
		params.AccountDetails = accountDetails
	}
	if model != "" {
		modelDetails, err := store.ModelByName(controller, model)
		c.Assert(err, jc.ErrorIsNil)
		params.ModelUUID = modelDetails.ModelUUID
	}
	return juju.NewAPIConnection(params)
}