--- /dev/null
+/****************************************************************************
+ * Copyright 2022 Thomas E. Dickey *
+ * *
+ * 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: test_delwin.c,v 1.3 2022/08/14 00:12:52 tom Exp $
+ */
+#include <test.priv.h>
+
+#define STATUS 10
+
+static SCREEN *my_screen;
+
+static void
+show_rc(const char *what, const char *explain, int rc)
+{
+ printw("%s : %d (%s)\n", what, rc, explain);
+}
+
+static void
+next_step(WINDOW *win)
+{
+ int ch = wgetch(win);
+ if (ch == QUIT || ch == ESCAPE) {
+ endwin();
+ /* use this to verify if delscreen frees all memory */
+ delscreen(my_screen);
+ exit(EXIT_FAILURE);
+ }
+}
+
+int
+main(void)
+{
+ WINDOW *parent, *child1;
+ int rc;
+
+ if ((my_screen = newterm(NULL, stdout, stdin)) == NULL)
+ ExitProgram(EXIT_FAILURE);
+
+ noecho();
+ cbreak();
+
+ refresh();
+ wsetscrreg(stdscr, 0, STATUS - 1);
+ scrollok(stdscr, TRUE);
+
+ parent = newwin(0, 0, STATUS, 0);
+ box(parent, 0, 0);
+ wrefresh(parent);
+ next_step(parent);
+
+ printw("New window %p %s\n", (void *) parent, "Top window");
+ mvwprintw(parent, 1, 1, "Top window");
+ wrefresh(parent);
+ next_step(stdscr);
+
+ child1 = derwin(parent, LINES - STATUS - 4, COLS - 4, 2, 2);
+ box(child1, 0, 0);
+ mvwprintw(child1, 1, 1, "Sub window");
+ wrefresh(child1);
+
+ printw("Sub window %p %s\n", (void *) child1, "Hello world!");
+ next_step(stdscr);
+
+ show_rc("Deleted parent",
+ "should fail, it still has a subwindow",
+ rc = delwin(parent));
+ next_step(stdscr);
+ show_rc("Deleted child1",
+ "should succeed",
+ rc = delwin(child1));
+ next_step(stdscr);
+ if (rc == OK) {
+ wclrtobot(parent);
+ box(parent, 0, 0);
+ next_step(parent);
+ }
+ show_rc("Deleted parent",
+ "should succeed, it has no subwindow now",
+ rc = delwin(parent));
+ next_step(stdscr);
+ if (rc == OK) {
+ touchwin(stdscr);
+ next_step(stdscr);
+ }
+ show_rc("Deleted parent",
+ "should fail, may dump core",
+ delwin(parent));
+ next_step(stdscr);
+ endwin();
+ ExitProgram(EXIT_SUCCESS);
+}