pkg syscall (darwin-386), const EISCONN = 56
pkg syscall (darwin-386), const EISDIR = 21
pkg syscall (darwin-386), const ELAST = 105
pkg syscall (darwin-386), const ELOOP = 62
pkg syscall (darwin-386), const EMFILE = 24
pkg syscall (darwin-386), const EMLINK = 31
pkg syscall (darwin-386), const EMSGSIZE = 40
pkg syscall (darwin-386), const EMULTIHOP = 95
pkg syscall (darwin-386), const ENAMETOOLONG = 63

pkg syscall (freebsd-riscv64), const ELAST = 96 #53466
pkg syscall (freebsd-riscv64), const ELAST Errno #53466
pkg syscall (freebsd-riscv64), const ELOOP = 62 #53466
pkg syscall (freebsd-riscv64), const EMFILE = 24 #53466
pkg syscall (freebsd-riscv64), const EMLINK = 31 #53466
pkg syscall (freebsd-riscv64), const EMSGSIZE = 40 #53466
pkg syscall (freebsd-riscv64), const EMULTIHOP = 90 #53466

		Name: "readme.zip",
	},
	{
		Name:  "readme.notzip",
		Error: ErrFormat,
	},
	{
		Name: "dd.zip",
		File: []ZipTestFile{
			{
				Name:     "filename",
				Content:  []byte("This is a test textfile.\n"),
				Modified: time.Date(2011, 2, 2, 13, 6, 20, 0, time.UTC),
				Mode:     0666,
			},
		},
	},
	{
		// created in windows XP file manager.
		Name: "winxp.zip",
		File: []ZipTestFile{
			{

pkg io/ioutil, func ReadAll //deprecated #42026
pkg io/ioutil, func ReadDir //deprecated #42026
pkg io/ioutil, func ReadFile //deprecated #42026
pkg io/ioutil, func TempDir //deprecated #42026
pkg io/ioutil, func TempFile //deprecated #42026
pkg io/ioutil, func WriteFile //deprecated #42026

}

func TestFileReader(t *testing.T) {
	type (
		testRead struct { // Read(cnt) == (wantStr, wantErr)
			cnt     int
			wantStr string
			wantErr error
		}
		testWriteTo struct { // WriteTo(testFile{ops}) == (wantCnt, wantErr)
			ops     fileOps
			wantCnt int64
			wantErr error
		}
		testRemaining struct { // logicalRemaining() == wantLCnt, physicalRemaining() == wantPCnt
			wantLCnt int64

pkg io/ioutil, func ReadDir(string) ([]os.FileInfo, error)
pkg io/ioutil, func ReadFile(string) ([]uint8, error)
pkg io/ioutil, func TempDir(string, string) (string, error)
pkg io/ioutil, func TempFile(string, string) (*os.File, error)
pkg io/ioutil, func WriteFile(string, []uint8, os.FileMode) error
pkg io/ioutil, var Discard io.Writer
pkg log, const Ldate ideal-int
pkg log, const Llongfile ideal-int

pkg syscall (darwin-arm64), const EISDIR = 21
pkg syscall (darwin-arm64), const ELAST = 106
pkg syscall (darwin-arm64), const ELAST Errno
pkg syscall (darwin-arm64), const ELOOP = 62
pkg syscall (darwin-arm64), const EMFILE = 24
pkg syscall (darwin-arm64), const EMLINK = 31
pkg syscall (darwin-arm64), const EMSGSIZE = 40
pkg syscall (darwin-arm64), const EMULTIHOP = 95
pkg syscall (darwin-arm64), const EMULTIHOP Errno

pkg syscall (freebsd-arm64), const EISDIR = 21
pkg syscall (freebsd-arm64), const ELAST = 96
pkg syscall (freebsd-arm64), const ELAST Errno
pkg syscall (freebsd-arm64), const ELOOP = 62
pkg syscall (freebsd-arm64), const EMFILE = 24
pkg syscall (freebsd-arm64), const EMLINK = 31
pkg syscall (freebsd-arm64), const EMSGSIZE = 40
pkg syscall (freebsd-arm64), const EMULTIHOP = 90
pkg syscall (freebsd-arm64), const EMULTIHOP Errno

filename This is a test textfile....

	"time"
)

type testError struct{ error }

type fileOps []any // []T where T is (string | int64)

// testFile is an io.ReadWriteSeeker where the IO operations performed
// on it must match the list of operations in ops.
type testFile struct {
	ops fileOps
	pos int64
}

func (f *testFile) Read(b []byte) (int, error) {
	if len(b) == 0 {
		return 0, nil
	}
	if len(f.ops) == 0 {
		return 0, io.EOF
	}