From: Richard Kettlewell <rjk@greenend.org.uk>
Date: Sat, 26 Apr 2008 14:08:59 +0000 (+0100)
Subject: exercise byte_fprintf
X-Git-Tag: 4.0~98
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/commitdiff_plain/f61b995d775123f321f165179fa51d5b28cfa8ac?ds=inline

exercise byte_fprintf
---

diff --git a/lib/t-printf.c b/lib/t-printf.c
index 057b503..be57bc8 100644
--- a/lib/t-printf.c
+++ b/lib/t-printf.c
@@ -30,6 +30,7 @@ void test_printf(void) {
   ptrdiff_t p;
   char *cp;
   char buffer[16];
+  FILE *fp;
   
   fprintf(stderr, "test_printf\n");
   check_string(do_printf("%d", 999), "999");
@@ -122,6 +123,13 @@ void test_printf(void) {
     i = byte_asprintf(&cp, f);
     insist(i == -1);
   }
+
+  fp = tmpfile();
+  insist(byte_fprintf(fp, "%10s\n", "wibble") == 11);
+  rewind(fp);
+  insist(fgets(buffer, sizeof buffer, fp) == buffer);
+  check_string(buffer, "    wibble\n");
+  fclose(fp);
 }
 
 /*