// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package fs

import (
	"path"
)

// A GlobFS is a file system with a Glob method.
type GlobFS interface {
	FS

	// Glob returns the names of all files matching pattern,
	// providing an implementation of the top-level
	// Glob function.
	Glob(pattern string) ([]string, error)
}

	_, err := Glob(os.DirFS("."), "/*"+strings.Repeat("/", 10001))
	if err != path.ErrBadPattern {
		t.Fatalf("Glob returned err=%v, want %v", err, path.ErrBadPattern)
	}
}

type globOnly struct{ GlobFS }

func (globOnly) Open(name string) (File, error) { return nil, ErrNotExist }

func TestGlobMethod(t *testing.T) {
	check := func(desc string, names []string, err error) {
		t.Helper()

}

// checkGlob checks that various glob patterns work if the file system implements GlobFS.
func (t *fsTester) checkGlob(dir string, list []fs.DirEntry) {
	if _, ok := t.fsys.(fs.GlobFS); !ok {
		return
	}

	// Make a complex glob pattern prefix that only matches dir.
	var glob string
	if dir != "." {
		elem := strings.Split(dir, "/")

pkg io/fs, type FileInfo interface, Size() int64
pkg io/fs, type FileInfo interface, Sys() interface{}
pkg io/fs, type FileMode uint32
pkg io/fs, type GlobFS interface { Glob, Open }
pkg io/fs, type GlobFS interface, Glob(string) ([]string, error)
pkg io/fs, type GlobFS interface, Open(string) (File, error)
pkg io/fs, type PathError struct
pkg io/fs, type PathError struct, Err error
pkg io/fs, type PathError struct, Op string

		{"File", Type, 16},
		{"FileInfo", Type, 16},
		{"FileInfoToDirEntry", Func, 17},
		{"FileMode", Type, 16},
		{"FormatDirEntry", Func, 21},
		{"FormatFileInfo", Func, 21},
		{"Glob", Func, 16},
		{"GlobFS", Type, 16},
		{"ModeAppend", Const, 16},
		{"ModeCharDevice", Const, 16},
		{"ModeDevice", Const, 16},
		{"ModeDir", Const, 16},
		{"ModeExclusive", Const, 16},
		{"ModeIrregular", Const, 16},