package storage

import (
	"os"
	"path/filepath"
	"testing"
)

func TestNewMultiKeepsDuplicateBasenames(t *testing.T) {
	root := t.TempDir()
	first := filepath.Join(root, "same")
	second := filepath.Join(root, "other", "same")
	if err := os.MkdirAll(first, 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.MkdirAll(second, 0o755); err != nil {
		t.Fatal(err)
	}
	m := NewMulti([]string{first, second})
	if len(m.Roots) != 2 || len(m.Names) != 2 {
		t.Fatalf("duplicate basename dropped: roots=%d names=%v", len(m.Roots), m.Names)
	}
	if m.Names[0] != "same" || m.Names[1] != "same-2" {
		t.Fatalf("unexpected virtual names: %v", m.Names)
	}
}

func TestMultiRejectsMutationOfVirtualRoot(t *testing.T) {
	root1 := t.TempDir()
	root2 := t.TempDir()
	m := NewMulti([]string{root1, root2})
	if err := m.Remove(m.Names[0]); err == nil {
		t.Fatal("expected virtual root removal to be rejected")
	}
	if _, err := m.Create(m.Names[0]); err == nil {
		t.Fatal("expected virtual root creation to be rejected")
	}
	if err := m.Rename(m.Names[0], m.Names[1]); err == nil {
		t.Fatal("expected virtual root rename to be rejected")
	}
}