Test of fgetwc on unbuffered stream.

libio/tst-fgetwc.c

@@ -0,0 +1,52 @@
+#include <locale.h>
+#include <stdio.h>
+#include <wchar.h>
+
+
+static int
+do_test (void)
+{
+  if (setlocale (LC_ALL, "de_DE.utf8") == NULL)
+    {
+      puts ("setlocale failed");
+      return 1;
+    }
+
+  if (setvbuf (stdin, NULL, _IONBF, 0) != 0)
+    {
+      puts ("setvbuf failed");
+      return 1;
+    }
+
+  wchar_t buf[100];
+  size_t nbuf = 0;
+  wint_t c;
+  while ((c = fgetwc (stdin)) != WEOF)
+    buf[nbuf++] = c;
+
+  if (ferror (stdin))
+    {
+      puts ("error on stdin");
+      return 1;
+    }
+
+  const wchar_t expected[] =
+    {
+      0x00000439, 0x00000446, 0x00000443, 0x0000043a,
+      0x00000435, 0x0000043d, 0x0000000a, 0x00000071,
+      0x00000077, 0x00000065, 0x00000072, 0x00000074,
+      0x00000079, 0x0000000a
+    };
+
+  if (nbuf != sizeof (expected) / sizeof (expected[0])
+      || wmemcmp (expected, buf, nbuf) != 0)
+    {
+      puts ("incorrect result");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"