From: Bruno Haible <bruno@clisp.org>
Date: Fri, 29 Feb 2008 00:08:18 +0000 (+0100)
Subject: More tests for freadptr.
X-Git-Tag: v0.1~7719
X-Git-Url: http://erislabs.org.uk/gitweb/?a=commitdiff_plain;h=5a79e1d1718961fa0fc9bee70062614fcc8ec7d9;p=gnulib.git

More tests for freadptr.
---

diff --git a/ChangeLog b/ChangeLog
index 040fffa2d..ceadefd23 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-02-28  Bruno Haible  <bruno@clisp.org>
+
+	* tests/test-freadptr.c: Add a test for behaviour after ungetc.
+	* tests/test-freadptr.sh: Also test non-seekable stdin.
+
 2008-02-28  Sergey Poznyakoff  <gray@gnu.org.ua>
 
 	* build-aux/bootstrap (source_base, m4_base)
@@ -5,7 +10,6 @@
 	(gnulib_tool_options): Do not hardcode base directories, use
 	the above variables instead.
 
-
 2008-02-28  Atsushi SAKAI  <sakaia@jp.fujitsu.com>
 
 	* lib/xsize.h: Fix typo in comment: s/tupe/type/.
diff --git a/tests/test-freadptr.c b/tests/test-freadptr.c
index 5c5e41e8a..5c69bbe8f 100644
--- a/tests/test-freadptr.c
+++ b/tests/test-freadptr.c
@@ -47,18 +47,79 @@ main (int argc, char **argv)
 
   if (lseek (0, 0, SEEK_CUR) == nbytes)
     /* An unbuffered stdio, such as BeOS or on uClibc compiled without
-       __STDIO_BUFFERS.  */
+       __STDIO_BUFFERS.  Or stdin is a pipe.  */
     ASSERT (freadahead (stdin) == 0);
   else
     {
       /* Normal buffered stdio.  */
       const char stdin_contents[] =
-	"#!/bin/sh\n\n./test-freadptr${EXEEXT} 5 < \"$srcdir/test-freadptr.sh\" || exit 1\nexit 0\n";
+	"#!/bin/sh\n\n./test-freadptr${EXEEXT} 5 < \"$srcdir/test-freadptr.sh\" || exit 1\ncat \"$srcdir/test-freadptr.sh\" | ./test-freadptr${EXEEXT} 5 || exit 1\nexit 0\n";
       const char *expected = stdin_contents + nbytes;
-      size_t available = freadahead (stdin);
+      size_t available;
+      size_t available2;
+      size_t available3;
+
+      /* Test normal behaviour.  */
+      available = freadahead (stdin);
       ASSERT (available != 0);
       ASSERT (available <= strlen (expected));
-      ASSERT (memcmp (freadptr (stdin), expected, available) == 0);
+      {
+	const char *ptr = freadptr (stdin);
+
+	ASSERT (ptr != NULL);
+	ASSERT (memcmp (ptr, expected, available) == 0);
+      }
+
+      /* Test behaviour after normal ungetc.  */
+      ungetc (fgetc (stdin), stdin);
+      available2 = freadahead (stdin);
+      ASSERT (/* available2 == available - 1 || */ available2 == available);
+#if 0
+      if (available2 == available - 1)
+	{
+	  ASSERT (freadptr (stdin) == NULL);
+	}
+      else
+#endif
+	{
+	  const char *ptr = freadptr (stdin);
+
+	  ASSERT (ptr != NULL);
+	  ASSERT (memcmp (ptr, expected, available) == 0);
+	}
+
+      /* Test behaviour after arbitrary ungetc.  */
+      fgetc (stdin);
+      ungetc ('@', stdin);
+      available3 = freadahead (stdin);
+      ASSERT (available3 == 0 || available3 == 1 || /* available3 == available - 1 || */ available3 == available);
+      if (available3 == 0)
+	;
+      else if (available3 == 1)
+	{
+	  const char *ptr = freadptr (stdin);
+
+	  if (ptr != NULL)
+	    {
+	      ASSERT (ptr[0] == '@');
+	    }
+	}
+#if 0
+      else if (available3 == available - 1)
+	{
+	  ASSERT (freadptr (stdin) == NULL);
+	}
+#endif
+      else
+	{
+	  const char *ptr = freadptr (stdin);
+
+	  if (ptr != NULL)
+	    {
+	      ASSERT (ptr[0] == '@');
+	      ASSERT (memcmp (ptr + 1, expected + 1, available - 1) == 0);
+	    }
+	}
     }
 
   return 0;
diff --git a/tests/test-freadptr.sh b/tests/test-freadptr.sh
index 945c31d62..97819b292 100755
--- a/tests/test-freadptr.sh
+++ b/tests/test-freadptr.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
 
 ./test-freadptr${EXEEXT} 5 < "$srcdir/test-freadptr.sh" || exit 1
+cat "$srcdir/test-freadptr.sh" | ./test-freadptr${EXEEXT} 5 || exit 1
 exit 0