1 files changed, 89 insertions, 0 deletions
diff --git a/libio/tst-memstream1.c b/libio/tst-memstream1.c
new file mode 100644
index 0000000000..d18f5cc22a
--- /dev/null
+++ b/libio/tst-memstream1.c
@@ -0,0 +1,89 @@
+#include <mcheck.h>
+#include <stdio.h>
+
+
+#ifndef CHAR_T
+# define CHAR_T char
+# define W(o) o
+# define OPEN_MEMSTREAM open_memstream
+#endif
+
+#define S(s) S1 (s)
+#define S1(s) #s
+
+
+static void
+mcheck_abort (enum mcheck_status ev)
+{
+  printf ("mecheck failed with status %d\n", (int) ev);
+  exit (1);
+}
+
+
+static int
+do_test (void)
+{
+  mcheck_pedantic (mcheck_abort);
+
+  CHAR_T *buf = (CHAR_T *) 1l;
+  size_t len = 12345;
+  FILE *fp = OPEN_MEMSTREAM (&buf, &len);
+  if (fp == NULL)
+    {
+      printf ("%s failed\n", S(OPEN_MEMSTREAM));
+      return 1;
+    }
+
+  if (fflush (fp) != 0)
+    {
+      puts ("fflush failed");
+      return 1;
+    }
+
+  if (len != 0)
+    {
+      puts ("string after no write not empty");
+      return 1;
+    }
+  if (buf == (CHAR_T *) 1l)
+    {
+      puts ("buf not updated");
+      return 1;
+    }
+  if (buf[0] != W('\0'))
+    {
+      puts ("buf[0] != 0");
+      return 1;
+    }
+
+  buf = (CHAR_T *) 1l;
+  len = 12345;
+  if (fclose (fp) != 0)
+    {
+      puts ("fclose failed");
+      return 1;
+    }
+
+  if (len != 0)
+    {
+      puts ("string after close with no write not empty");
+      return 1;
+    }
+  if (buf == (CHAR_T *) 1l)
+    {
+      puts ("buf not updated");
+      return 1;
+    }
+  if (buf[0] != W('\0'))
+    {
+      puts ("buf[0] != 0");
+      return 1;
+    }
+
+  free (buf);
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"