/**
*
*/
public function testMask()
{
$this->assertEquals('**llo', Str::mask('hello'));
$this->assertEquals('**lle', Str::mask('kølle'));
$this->assertEquals('********タジー', Str::mask('ファイナルファンタジー'));
$this->assertEquals('***lo', Str::mask('hello', 2));
$this->assertEquals('***le', Str::mask('kølle', 2));
$this->assertEquals('*********ジー', Str::mask('ファイナルファンタジー', 2));
$this->assertEquals('*****', Str::mask('hello', 0));
$this->assertEquals('*****', Str::mask('kølle', 0));
$this->assertEquals('***********', Str::mask('ファイナルファンタジー', 0));
$this->assertEquals('xxxxx', Str::mask('hello', 0, 'x'));
$this->assertEquals('xxxxx', Str::mask('kølle', 0, 'x'));
$this->assertEquals('xxxxxxxxxxx', Str::mask('ファイナルファンタジー', 0, 'x'));
}
