/**
* Change the case of all keys in current ArrayObject.
*
* @param string $case Case to which you want to covert array keys. Can be 'lower' or 'upper'.
*
* @return $this
* @throws ArrayObjectException
*/
public function changeKeyCase($case)
{
// validate case
$case = new StringObject($case);
$case->caseLower();
$realCase = '';
if ($case->equals('lower')) {
$realCase = CASE_LOWER;
} else {
if ($case->equals('upper')) {
$realCase = CASE_UPPER;
} else {
throw new ArrayObjectException(ArrayObjectException::MSG_PARAM_VALUE_OUT_OF_SCOPE, ['$case', '"lower" or "upper"']);
}
}
$this->val(array_change_key_case($this->val(), $realCase));
return $this;
}
public function testEquals()
{
$s = new StringObject('test string');
$s2 = new StringObject('test string');
$this->assertTrue($s->equals($s2));
}