"path"
	"slices"
	"strings"
	"testing"
)

var globTests = []struct {
	fs              FS
	pattern, result string
}{
	{os.DirFS("."), "glob.go", "glob.go"},
	{os.DirFS("."), "gl?b.go", "glob.go"},
	{os.DirFS("."), `gl\ob.go`, "glob.go"},
	{os.DirFS("."), "*", "glob.go"},
	{os.DirFS(".."), "*/glob.go", "fs/glob.go"},
}

func TestGlob(t *testing.T) {
	for _, tt := range globTests {

// [io/fs.ReadDirFS].
func DirFS(dir string) fs.FS {
	return dirFS(dir)
}

type dirFS string

func (dir dirFS) Open(name string) (fs.File, error) {
	fullname, err := dir.join(name)
	if err != nil {
		return nil, &PathError{Op: "open", Path: name, Err: err}
	}
	f, err := Open(fullname)
	if err != nil {
		// DirFS takes a string appropriate for GOOS,

	// Test that Open can open a path starting at /.
	d := DirFS("/")
	f, err := d.Open(cwd + "/testdata/dirfs/a")
	if err != nil {
		t.Fatal(err)
	}
	f.Close()
}

func TestDirFSEmptyDir(t *testing.T) {
	t.Parallel()

	d := DirFS("")
	cwd, _ := Getwd()
	for _, path := range []string{
		"testdata/dirfs/a",                          // not DirFS(".")

	"errors"
	"internal/testenv"
	"io/fs"
	"os"
	"path/filepath"
	"slices"
	"strings"
	"testing"
)

func TestSymlink(t *testing.T) {
	testenv.MustHaveSymlink(t)

	tmp := t.TempDir()
	tmpfs := os.DirFS(tmp)

	if err := os.WriteFile(filepath.Join(tmp, "hello"), []byte("hello, world\n"), 0644); err != nil {
		t.Fatal(err)
	}

	if err := os.Symlink(filepath.Join(tmp, "hello"), filepath.Join(tmp, "hello.link")); err != nil {

		return nil, fmt.Errorf("error initializing the host rules for health checks: %w", err)
	}

	podNetns := NewPodNetnsProcFinder(os.DirFS(filepath.Join(pconstants.HostMountsPath, "proc")))
	netServer := newNetServer(ztunnelServer, podNsMap, iptablesConfigurator, podNetns, set)

	// Set some defaults
	s := &Server{
		ctx:        ctx,

	for i := 0; i < 2; i++ {
		var h Handler
		var name string
		switch i {
		case 0:
			h = FileServer(Dir("."))
			name = "Dir"
		case 1:
			h = FileServer(FS(os.DirFS(".")))
			name = "DirFS"
		}
		t.Run(name, func(t *testing.T) {
			const want = "index.html says hello\n"
			ts := newClientServerTest(t, mode, h).ts

			for _, path := range []string{"/testdata/", "/testdata/index.html"} {