Modified: time.Date(2011, 12, 8, 10, 4, 24, 0, time.UTC),
				Mode:     0666,
			},
			{
				Name:     "dir/bar",
				Content:  []byte("foo \r\n"),
				Modified: time.Date(2011, 12, 8, 10, 4, 50, 0, time.UTC),
				Mode:     0666,
			},
			{
				Name:     "dir/empty/",
				Content:  []byte{},
				Modified: time.Date(2011, 12, 8, 10, 8, 6, 0, time.UTC),
				Mode:     fs.ModeDir | 0777,
			},

		},
	}, {
		maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 10},
		tests: []testFnc{
			testRemaining{10, 5},
			testRead{100, "ab\x00\x00\x00cde\x00\x00", io.EOF},
			testRemaining{0, 0},
		},
	}, {
		maker: makeSparse{makeReg{"abc", 5}, sparseDatas{{0, 2}, {5, 3}}, 10},
		tests: []testFnc{
			testRemaining{10, 5},
			testRead{100, "ab\x00\x00\x00c", io.ErrUnexpectedEOF},

		t.Fatal(err)
	}
	if n, err := r.Read(make([]byte, 10)); n != 0 || err != io.EOF {
		t.Errorf("Read = %d, %v; want 0, EOF", n, err)
	}
}

func TestReaderAt(t *testing.T) {
	r := NewReader([]byte("0123456789"))
	tests := []struct {
		off     int64
		n       int
		want    string
		wanterr any
	}{
		{0, 10, "0123456789", nil},
		{1, 10, "123456789", io.EOF},
		{1, 9, "123456789", nil},