Increase the amount of data tested in stdio-common/tst-fwrite-pipe.c

The number of iterations and the length of the string are not high
enough on some systems causing the test to return false-positives.

Testcase stdio-common/tst-fwrite-bz29459.c was fixed in the same way in
1b6f868625403d6b7683af840e87d2b18d5d7731
(Increase the amount of data tested in stdio-common/tst-fwrite-bz29459.c, 2025-02-14)

Testcases stdio-common/tst-fwrite-bz29459.c and stdio-common/tst-fwrite-pipe.c
were introcued in 596a61cf6b51ce2d58b8ca4e1d1f4fdfe1440dbc
(libio: Start to return errors when flushing fwrite's buffer [BZ #29459], 2025-01-28)

1 files changed, 2 insertions, 2 deletions

diff --git a/stdio-common/tst-fwrite-pipe.c b/stdio-common/tst-fwrite-pipe.c
index a611912..ce1a92b 100644
--- a/stdio-common/tst-fwrite-pipe.c
+++ b/stdio-common/tst-fwrite-pipe.c
@@ -27,7 +27,7 @@
 /* Usually this test reproduces in a few iterations.  However, keep a high
    number of iterations in order to avoid return false-positives due to an
    overwhelmed/slow system.  */
-#define ITERATIONS 5000
+#define ITERATIONS 500000
 
 #define BUFFERSIZE 20
 
@@ -71,7 +71,7 @@ do_test (void)
     {
       /* Ensure the string we send has a new line because we're dealing
          with a lined-buffered stream.  */
-      const char *s = "hello\n";
+      const char *s = "hello world\n";
       size_t len = strlen (s);
       int i;