diff --git a/test/insdelln.c b/test/insdelln.c
new file mode 100644
index 0000000..34fb388
--- /dev/null
+++ b/test/insdelln.c
@@ -0,0 +1,389 @@
+/****************************************************************************
+ * Copyright (c) 2008-2012,2014 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+/*
+ * $Id: insdelln.c,v 1.9 2014/08/02 23:09:32 tom Exp $
+ *
+ * test-driver for deleteln, wdeleteln, insdelln, winsdelln, insertln, winsertln
+ */
+
+#include <test.priv.h>
+
+#define SHOW(n) ((n) == ERR ? "ERR" : "OK")
+#define COLOR_DEFAULT (-1)
+
+typedef struct {
+    unsigned c;
+    unsigned v;
+    int pair;
+    unsigned attr;
+    int count;
+    int ch;
+    const char *c_msg;
+    const char *v_msg;
+    int y_val;
+    int x_val;
+    int y_beg, x_beg;
+    int y_max, x_max;
+} STATUS;
+
+static const char *
+color_params(unsigned state, int *pair)
+{
+    /* *INDENT-OFF* */
+    static struct {
+	short pair;
+	short fg, bg;
+	const char *msg;
+    } table[] = {
+	{ 0, COLOR_DEFAULT, COLOR_DEFAULT, "default" },
+	{ 1, COLOR_RED,     COLOR_BLACK,   "red/black" },
+	{ 2, COLOR_WHITE,   COLOR_BLUE,    "white/blue" },
+    };
+    /* *INDENT-ON* */
+
+    static bool first = TRUE;
+    const char *result = 0;
+
+    if (has_colors()) {
+	if (first) {
+	    unsigned n;
+
+	    start_color();
+	    for (n = 0; n < SIZEOF(table); ++n) {
+		init_pair(table[n].pair, table[n].fg, table[n].bg);
+	    }
+	}
+	if (state < SIZEOF(table)) {
+	    *pair = table[state].pair;
+	    result = table[state].msg;
+	}
+    }
+    return result;
+}
+
+static const char *
+video_params(unsigned state, unsigned *attr)
+{
+    /* *INDENT-OFF* */
+    static struct {
+	unsigned attr;
+	const char *msg;
+    } table[] = {
+	{ A_NORMAL,	"normal" },
+	{ A_BOLD,	"bold" },
+	{ A_REVERSE,	"reverse" },
+	{ A_UNDERLINE,	"underline" },
+	{ A_BLINK, 	"blink" },
+    };
+    /* *INDENT-ON* */
+
+    const char *result = 0;
+
+    if (state < SIZEOF(table)) {
+	*attr = table[state].attr;
+	result = table[state].msg;
+    }
+    return result;
+}
+
+/* fill the window with a test-pattern */
+static void
+fill_window(WINDOW *win)
+{
+    int y, x;
+    int y0 = -1, x0 = -1;
+
+    getyx(win, y, x);
+    wmove(win, 0, 0);
+    while (waddstr(win, "0123456789 abcdefghijklmnopqrstuvwxyz ") != ERR) {
+	int y1, x1;
+	getyx(win, y1, x1);
+	if (y1 == y0 && x1 == x0)
+	    break;
+	x0 = x1;
+	y0 = y1;
+    }
+    wmove(win, y, x);
+}
+
+static void
+show_status(WINDOW *win, STATUS * sp)
+{
+    int y, x;
+
+    getyx(win, y, x);
+    wmove(win, 0, 0);
+    wprintw(win, "Count %d", sp->count);
+    if (sp->v_msg != 0)
+	wprintw(win, " Video %s", sp->v_msg);
+    if (sp->c_msg != 0)
+	wprintw(win, " Color %s", sp->c_msg);
+    wclrtoeol(win);
+    wmove(win, y, x);
+}
+
+static void
+reshow_status(WINDOW *win, STATUS * sp)
+{
+    fill_window(win);
+    show_status(win, sp);
+}
+
+static void
+do_subwindow(WINDOW *win, STATUS * sp, void func(WINDOW *))
+{
+    WINDOW *win1 = newwin(sp->y_max - 2, sp->x_max - 2,
+			  sp->y_beg + 1, sp->x_beg + 1);
+
+    if (win1 != 0 && sp->y_max > 4 && sp->x_max > 4) {
+	WINDOW *win2 = derwin(win1, sp->y_max - 4, sp->x_max - 4, 1, 1);
+
+	if (win2 != 0) {
+	    box(win1, 0, 0);
+	    wrefresh(win1);
+	    func(win2);
+
+	    delwin(win2);
+	} else {
+	    beep();
+	}
+	delwin(win1);
+	touchwin(win);
+    } else {
+	if (win1)
+	    delwin(win1);
+	beep();
+    }
+}
+
+static void
+init_status(WINDOW *win, STATUS * sp)
+{
+    memset(sp, 0, sizeof(*sp));
+    sp->c = 99;
+    sp->v = 99;
+    sp->ch = ' ';
+
+    keypad(win, TRUE);
+    fill_window(win);
+
+    getbegyx(win, sp->y_beg, sp->x_beg);
+    getmaxyx(win, sp->y_max, sp->x_max);
+}
+
+static void
+show_help(WINDOW *win)
+{
+    static const char *table[] =
+    {
+	"Basic commands:"
+	,"Use h/j/k/l or arrow keys to move the cursor."
+	,"Set the count parameter for insert/delete by entering digits 0-9."
+	,""
+	,"Other commands:"
+	,"space toggles through the set of video attributes and colors."
+	,"t     touches (forces repaint) of the current line."
+	,"i     calls insertln at the current position with the given count."
+	,"d     calls deleteln at the window beginning with the given count."
+	,"I     calls insdelln at the window beginning with the given count."
+	,"D     calls insdelln at the window beginning with the given -count."
+	,"f     refills the window with test-pattern using current attributes."
+	,"w     recur to test windows other than stdscr"
+	,"q     quit"
+	,"=     resets count to zero."
+	,"?     shows this help-window"
+	,""
+	,""
+    };
+
+    int y_max, x_max;
+    int row;
+
+    getmaxyx(win, y_max, x_max);
+    for (row = 0; row < (int) SIZEOF(table) && row < y_max; ++row) {
+	MvWPrintw(win, row, 0, "%.*s", x_max, table[row]);
+    }
+    while (wgetch(win) != 'q')
+	beep();
+}
+
+static void
+update_status(WINDOW *win, STATUS * sp)
+{
+    switch (sp->ch) {
+    case ' ':			/* next test-iteration */
+	if (has_colors()) {
+	    if ((sp->c_msg = color_params(++(sp->c), &(sp->pair))) == 0) {
+		sp->c_msg = color_params(sp->c = 0, &(sp->pair));
+		if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) {
+		    sp->v_msg = video_params(sp->v = 0, &(sp->attr));
+		}
+	    }
+	} else {
+	    if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) {
+		sp->v_msg = video_params(sp->v = 0, &(sp->attr));
+	    }
+	}
+	sp->count = 0;
+	show_status(win, sp);
+	break;
+    case KEY_LEFT:
+    case 'h':
+	if (sp->x_val > 0)
+	    wmove(win, sp->y_val, --(sp->x_val));
+	break;
+    case KEY_DOWN:
+    case 'j':
+	if (sp->y_val < sp->y_max)
+	    wmove(win, ++(sp->y_val), sp->x_val);
+	break;
+    case KEY_UP:
+    case 'k':
+	if (sp->y_val > 0)
+	    wmove(win, --(sp->y_val), sp->x_val);
+	break;
+    case KEY_RIGHT:
+    case 'l':
+	if (sp->x_val < sp->x_max)
+	    wmove(win, sp->y_val, ++(sp->x_val));
+	break;
+    case 't':
+	touchline(win, sp->y_val, 1);
+	break;
+    case '=':
+	sp->count = 0;
+	show_status(win, sp);
+	break;
+    case '?':
+	do_subwindow(win, sp, show_help);
+	break;
+    default:
+	if (isdigit(sp->ch)) {
+	    sp->count = (sp->count * 10) + (sp->ch - '0');
+	    show_status(win, sp);
+	} else {
+	    beep();
+	}
+	break;
+    }
+}
+
+static void
+test_winsdelln(WINDOW *win)
+{
+    STATUS st;
+    int n;
+
+    init_status(win, &st);
+
+    do {
+	(void) wattrset(win, AttrArg(COLOR_PAIR(st.pair), st.attr));
+	switch (st.ch) {
+	case 'i':
+	    for (n = 0; n < st.count; ++n)
+		winsertln(win);
+	    break;
+	case 'd':
+	    for (n = 0; n < st.count; ++n)
+		wdeleteln(win);
+	    break;
+	case 'I':
+	    winsdelln(win, st.count);
+	    break;
+	case 'D':
+	    winsdelln(win, -st.count);
+	    break;
+	case 'f':
+	    fill_window(win);
+	    reshow_status(win, &st);
+	    break;
+	case 'w':
+	    do_subwindow(win, &st, test_winsdelln);
+	    break;
+	case 'q':
+	    return;
+	default:
+	    update_status(win, &st);
+	    break;
+	}
+    } while ((st.ch = wgetch(win)) != ERR);
+}
+
+static void
+test_insdelln(void)
+{
+    STATUS st;
+    int n;
+
+    init_status(stdscr, &st);
+
+    do {
+	(void) attrset(AttrArg(COLOR_PAIR(st.pair), st.attr));
+	switch (st.ch) {
+	case 'i':
+	    for (n = 0; n < st.count; ++n)
+		insertln();
+	    break;
+	case 'd':
+	    for (n = 0; n < st.count; ++n)
+		deleteln();
+	    break;
+	case 'I':
+	    insdelln(st.count);
+	    break;
+	case 'D':
+	    insdelln(-st.count);
+	    break;
+	case 'f':
+	    fill_window(stdscr);
+	    reshow_status(stdscr, &st);
+	    break;
+	case 'w':
+	    do_subwindow(stdscr, &st, test_winsdelln);
+	    break;
+	case 'q':
+	    return;
+	default:
+	    update_status(stdscr, &st);
+	    break;
+	}
+    } while ((st.ch = getch()) != ERR);
+}
+
+int
+main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
+{
+    initscr();
+    cbreak();
+    noecho();
+
+    test_insdelln();
+    endwin();
+
+    ExitProgram(EXIT_SUCCESS);
+}