Tests for function fread().

* modules/fread-tests: New file.
* tests/test-fread.c: New file.
* modules/stdio-tests (Depends-on): Add fread-tests.

4 files changed, 108 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 4696e66322..9670e065ba 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2011-09-24  Bruno Haible  <bruno@clisp.org>
 
+	Tests for function fread().
+	* modules/fread-tests: New file.
+	* tests/test-fread.c: New file.
+	* modules/stdio-tests (Depends-on): Add fread-tests.
+
 	Activate fputc tests.
 	* modules/stdio-tests (Depends-on): Add fputc-tests.
 
diff --git a/modules/fread-tests b/modules/fread-tests
new file mode 100644
index 0000000000..49f0a71862
--- /dev/null
+++ b/modules/fread-tests
@@ -0,0 +1,12 @@
+Files:
+tests/test-fread.c
+tests/signature.h
+tests/macros.h
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-fread
+check_PROGRAMS += test-fread
diff --git a/modules/stdio-tests b/modules/stdio-tests
index 6649a49eba..68f2ffd584 100644
--- a/modules/stdio-tests
+++ b/modules/stdio-tests
@@ -6,6 +6,7 @@ verify
 stdio-c++-tests
 fgetc-tests
 fputc-tests
+fread-tests
 
 configure.ac:
 
diff --git a/tests/test-fread.c b/tests/test-fread.c
new file mode 100644
index 0000000000..0f77dbfce1
--- /dev/null
+++ b/tests/test-fread.c
@@ -0,0 +1,90 @@
+/* Test of fread() function.
+   Copyright (C) 2011 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, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fread, size_t, (void *, size_t, size_t, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fread.txt";
+
+  /* Prepare a file.  */
+  {
+    const char text[] = "hello world";
+    int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
+    ASSERT (fd >= 0);
+    ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
+    ASSERT (close (fd) == 0);
+  }
+
+  /* Test that fread() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    char buf[5];
+    ASSERT (fp != NULL);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fread (buf, 1, sizeof (buf), fp) == 0);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fread() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "r");
+    if (fp != NULL)
+      {
+        char buf[1];
+        errno = 0;
+        ASSERT (fread (buf, 1, 1, fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp = fdopen (99, "r");
+    if (fp != NULL)
+      {
+        char buf[1];
+        errno = 0;
+        ASSERT (fread (buf, 1, 1, fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}