Test yesno in combination with closein.

* lib/yesno.c (yesno): Document use of stdin.
* modules/yesno-tests (Files): New module.
* tests/test-yesno.c (main): New file.
* tests/test-yesno.sh: Likewise.

2 files changed, 109 insertions, 0 deletions

diff --git a/tests/test-yesno.c b/tests/test-yesno.c
new file mode 100644
index 0000000000..1e15acddad
--- /dev/null
+++ b/tests/test-yesno.c
@@ -0,0 +1,51 @@
+/* Test of yesno module.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "closein.h"
+#include "yesno.h"
+
+char *program_name;
+
+/* Test yesno.  Without arguments, read one line.  If first argument
+   is zero, close stdin before attempting to read one line.
+   Otherwise, read the number of lines specified by first
+   argument.  */
+int
+main (int argc, char **argv)
+{
+  int i = 1;
+  program_name = argv[0];
+  /* yesno recommends that all clients use close_stdin in main.  */
+  atexit (close_stdin);
+
+  if (1 < argc)
+    i = atoi (argv[1]);
+  if (!i)
+    {
+      i = 1;
+      close (0);
+    }
+  while (i--)
+    puts (yesno () ? "Y" : "N");
+  return 0;
+}
diff --git a/tests/test-yesno.sh b/tests/test-yesno.sh
new file mode 100755
index 0000000000..fdf9948006
--- /dev/null
+++ b/tests/test-yesno.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+
+tmpfiles=
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+p=t-yesno-
+tmpfiles="${p}in.tmp ${p}xout.tmp ${p}out.tmp"
+
+# For now, only test with C locale
+LC_ALL=C
+export LC_ALL
+
+# Test with seekable stdin; followon process must see remaining data
+cat <<EOF > ${p}in.tmp
+nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn - entire line consumed
+yn - backspace does not change result
+y
+does not match either yesexpr or noexpr
+n
+EOF
+cat <<EOF > ${p}xout.tmp
+N
+Y
+Y
+N
+n
+EOF
+(./test-yesno${EXEEXT}; ./test-yesno${EXEEXT} 3; cat) \
+  < ${p}in.tmp > ${p}out.tmp || exit 1
+cmp ${p}xout.tmp ${p}out.tmp || exit 1
+
+(./test-yesno${EXEEXT} 3; ./test-yesno${EXEEXT}; cat) \
+  < ${p}in.tmp > ${p}out.tmp || exit 1
+cmp ${p}xout.tmp ${p}out.tmp || exit 1
+
+# Test for behavior on pipe
+cat <<EOF > ${p}xout.tmp
+Y
+N
+EOF
+echo yes | ./test-yesno${EXEEXT} 2 > ${p}out.tmp || exit 1
+cmp ${p}xout.tmp ${p}out.tmp || exit 1
+
+# Test for behavior on EOF
+cat <<EOF > ${p}xout.tmp
+N
+EOF
+./test-yesno${EXEEXT} </dev/null > ${p}out.tmp || exit 1
+cmp ${p}xout.tmp ${p}out.tmp || exit 1
+
+# Test for behavior when stdin is closed
+./test-yesno${EXEEXT} 0 <&- > ${p}out.tmp && exit 1
+cmp ${p}xout.tmp ${p}out.tmp || exit 1
+
+# Cleanup
+rm -fr $tmpfiles
+
+exit 0