From ba35bf7ef0946a29865ec26c466c4bb240ebf388 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Fri, 29 Feb 2008 10:31:01 +0100
Subject: [PATCH] Tests for module 'freadseek'.

---
 ChangeLog               |   4 ++
 modules/freadseek-tests |  13 +++++++
 tests/test-freadseek.c  | 100 ++++++++++++++++++++++++++++++++++++++++++++++++
 tests/test-freadseek.sh |   5 +++
 4 files changed, 122 insertions(+)
 create mode 100644 modules/freadseek-tests
 create mode 100644 tests/test-freadseek.c
 create mode 100755 tests/test-freadseek.sh

diff --git a/ChangeLog b/ChangeLog
index 32bfe85d8..ace7d2a57 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2008-02-29  Bruno Haible  <bruno@clisp.org>
 
+	* modules/freadseek-tests: New file.
+	* tests/test-freadseek.sh: New file.
+	* tests/test-freadseek.c: New file.
+
 	New module 'freadseek'.
 	* modules/freadseek: New file.
 	* lib/freadseek.h: New file.
diff --git a/modules/freadseek-tests b/modules/freadseek-tests
new file mode 100644
index 000000000..6fb15489e
--- /dev/null
+++ b/modules/freadseek-tests
@@ -0,0 +1,13 @@
+Files:
+tests/test-freadseek.c
+tests/test-freadseek.sh
+
+Depends-on:
+unistd
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-freadseek.sh
+TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@' srcdir='$(srcdir)'
+check_PROGRAMS += test-freadseek
diff --git a/tests/test-freadseek.c b/tests/test-freadseek.c
new file mode 100644
index 000000000..ffe3cecfc
--- /dev/null
+++ b/tests/test-freadseek.c
@@ -0,0 +1,100 @@
+/* Test of freadseek() function.
+   Copyright (C) 2007-2008 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include "freadseek.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+int
+main (int argc, char **argv)
+{
+  static const char stdin_contents[] =
+    "#!/bin/sh\n\n./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 < \"$srcdir/test-freadseek.sh\" || exit 1\ncat \"$srcdir/test-freadseek.sh\" | ./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 || exit 1\nexit 0\n";
+  int nbytes1 = atoi (argv[1]);
+  int nbytes2 = atoi (argv[2]);
+  int nbytes3 = atoi (argv[3]);
+  int nbytes4 = atoi (argv[4]);
+  int nbytes5 = atoi (argv[5]);
+  int nbytes6 = atoi (argv[6]);
+  int nbytes7 = atoi (argv[7]);
+  void *buf1 = malloc (nbytes1);
+  void *buf3 = malloc (nbytes3);
+  void *buf5 = malloc (nbytes5);
+  void *buf7 = malloc (nbytes7);
+  /* A private variable to keep track of the position.  */
+  size_t position = 0;
+
+  ASSERT (fread (buf1, 1, nbytes1, stdin) == nbytes1);
+  ASSERT (memcmp (buf1, stdin_contents + position, nbytes1) == 0);
+  position += nbytes1;
+
+  /* Test normal behaviour.  */
+  ASSERT (freadseek (stdin, nbytes2) == 0);
+  position += nbytes2;
+
+  ASSERT (fread (buf3, 1, nbytes3, stdin) == nbytes3);
+  ASSERT (memcmp (buf3, stdin_contents + position, nbytes3) == 0);
+  position += nbytes3;
+
+  /* Test behaviour after normal ungetc.  */
+  ungetc (fgetc (stdin), stdin);
+  ASSERT (freadseek (stdin, nbytes4) == 0);
+  position += nbytes4;
+
+  ASSERT (fread (buf5, 1, nbytes5, stdin) == nbytes5);
+  ASSERT (memcmp (buf5, stdin_contents + position, nbytes5) == 0);
+  position += nbytes5;
+
+  /* Test behaviour after arbitrary ungetc.  */
+  fgetc (stdin);
+  ungetc ('@', stdin);
+  ASSERT (freadseek (stdin, nbytes6) == 0);
+  position += nbytes6;
+
+  ASSERT (fread (buf7, 1, nbytes7, stdin) == nbytes7);
+  ASSERT (memcmp (buf7, stdin_contents + position, nbytes7) == 0);
+  position += nbytes7;
+
+  /* Test move to end of file.  */
+  ASSERT (freadseek (stdin, strlen (stdin_contents) - position) == 0);
+  ASSERT (fgetc (stdin) == EOF);
+  ASSERT (!ferror (stdin));
+
+  /* Test move beyond end of file.  */
+  ASSERT (freadseek (stdin, 1000000) == 0);
+  ASSERT (fgetc (stdin) == EOF);
+  ASSERT (!ferror (stdin));
+
+  return 0;
+}
diff --git a/tests/test-freadseek.sh b/tests/test-freadseek.sh
new file mode 100755
index 000000000..453cadfd8
--- /dev/null
+++ b/tests/test-freadseek.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 < "$srcdir/test-freadseek.sh" || exit 1
+cat "$srcdir/test-freadseek.sh" | ./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 || exit 1
+exit 0
-- 
2.11.0