You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: barrier_view_test.go
    path of file: ./repos/vault/vault
    
    the code of the file until where you have to start completion: // Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1

package vault

import (
	"context"
	"reflect"
	"sort"
	"testing"

	"github.com/hashicorp/vault/sdk/logical"
)

func TestBarrierView_impl(t *testing.T) {
	var _ logical.Storage = new(BarrierView)
}

func TestBarrierView_spec(t *testing.T) {
	_, barrier, _ := mockBarrier(t)
	view := NewBarrierView(barrier, "foo/")
	logical.TestStorage(t, view)
}

func TestBarrierView_BadKeysKeys(t *testing.T) {
	_, barrier, _ := mockBarrier(t)
	view := NewBarrierView(barrier, "foo/")

	_, err := view.List(context.Background(), "../")
	if err == nil {
		t.Fatalf("expected error")
	}

	_, err = view.Get(context.Background(), "../")
    
func TestBarrierView_SubView(t *testing.T) {
	_, barrier, _ := mockBarrier(t)
	root := NewBarrierView(barrier, "foo/")
	view := root.SubView("bar/")

	// List should have no visibility
	keys, err := view.List(context.Background(), "")
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if len(keys) != 0 {
		t.Fatalf("bad: %v", err)
	}

	// Get should have no visibility
	out, err := view.Get(context.Background(), "test")
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if out != nil {
		t.Fatalf("bad: %v", out)
	}

	// Try to put the same entry via the view
	entry := &logical.StorageEntry{Key: "test", Value: []byte("test")}
	if err := view.Put(context.Background(), entry); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Check it is nested
	bout, err := barrier.Get(context.Background(), "foo/bar/test")
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if bout == nil {
		t.Fatalf("missing nested foo/bar/test")
	}

	// Check for visibility in root
	out, err = root.Get(context.Background(), "bar/test")
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if out == nil {
		t.Fatalf("missing nested bar/test")
	}

	// Delete nested
	if err := view.Delete(context.Background(), "test"); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Check the nested key
	bout, err = barrier.Get(context.Background(), "foo/bar/test")
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	if bout != nil {
		t.Fatalf("nested foo/bar/test should be gone")
	}
}