public function testReplaceAndCount()
{
$this->eq(s::replaceAndCount('abcxabc', 'x', 'y'), array('abcyabc', 1));
$this->eq(s::replaceAndCount('afoobara', 'foobar', 'b'), array('aba', 1));
$this->eq(s::replaceAndCount('aaxyaaaxya', 'xy', 'b'), array('aabaaaba', 2));
$this->eq(s::replaceAndCount('', 'abc', ''), array('', 0));
$this->eq(s::replaceAndCount('abc', '', 'x'), array('xaxbxcx', 4));
$this->eq(s::replaceAndCount('', '', 'x'), array('x', 1));
}
public function replaceAndCount($old, $new)
{
$r = s::replaceAndCount($this->value, self::unwrap($old), self::unwrap($new));
$r[0] = new self($r[0]);
return $r;
}
