void append_non_wide_to_empty(void **state);
void append_wide_to_empty(void **state);

void append_non_wide_to_non_wide(void **state);
void append_wide_to_non_wide(void **state);

void append_non_wide_to_wide(void **state);
void append_wide_to_wide(void **state);

void append_no_wide_when_overrun(void **state);
void append_wide_when_overrun(void **state);