1 files changed, 21 insertions, 0 deletions
diff --git a/stpnset.c b/stpnset.c
index 59ce182..20da276 100644
--- a/stpnset.c
+++ b/stpnset.c
@@ -12,6 +12,27 @@ extern inline char *libsimple_stpnset(char *, int, size_t);
 int
 main(void)
 {
+	char buf[100];
+
+	stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+	assert(libsimple_stpnset(buf, 'x', SIZE_MAX) == &buf[11]);
+	assert(!strcmp(buf, "xxxxxxxxxxx"));
+	assert(!strcmp(&buf[12], "goodbye world"));
+
+	stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+	assert(libsimple_stpnset(buf, '\0', SIZE_MAX) == &buf[11]);
+	assert(!memcmp(buf, "\0\0\0\0\0\0\0\0\0\0\0\0goodbye world", 26));
+
+
+	stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+	assert(libsimple_stpnset(buf, 'x', 5) == &buf[5]);
+	assert(!strcmp(buf, "xxxxx world"));
+	assert(!strcmp(&buf[12], "goodbye world"));
+
+	stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+	assert(libsimple_stpnset(buf, '\0', 5) == &buf[5]);
+	assert(!memcmp(buf, "\0\0\0\0\0 world\0goodbye world", 26));
+
 	return 0;
 }