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-rw-r--r--stdio-common/tst-ungetc.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/stdio-common/tst-ungetc.c b/stdio-common/tst-ungetc.c
index ba74a84f7f..08819b7765 100644
--- a/stdio-common/tst-ungetc.c
+++ b/stdio-common/tst-ungetc.c
@@ -22,17 +22,24 @@ main (int argc, char *argv[])
name = tmpnam (NULL);
fp = fopen (name, "w");
assert (fp != NULL)
- fputs ("bl", fp);
+ fputs ("bla", fp);
fclose (fp);
fp = NULL;
fp = fopen (name, "r");
- assert (fp != NULL)
- assert (getc (fp) != EOF);
- assert ((c = getc (fp)) != EOF);
+ assert (fp != NULL);
+ assert (ungetc ('z', fp) == 'z');
+ assert (getc (fp) == 'z');
+ assert (getc (fp) == 'b');
+ assert (getc (fp) == 'l');
+ assert (ungetc ('m', fp) == 'm');
+ assert (getc (fp) == 'm');
+ assert ((c = getc (fp)) == 'a');
assert (getc (fp) == EOF);
assert (ungetc (c, fp) == c);
assert (feof (fp) == 0);
+ assert (getc (fp) == c);
+ assert (getc (fp) == EOF);
the_end:
if (fp != NULL)