assert_sbuf_state
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, SBUF_FINISHED);
assert_sbuf_state(s, 0);
assert_sbuf_state(s, 0);