public function testChangeEncoding()
{
$this->stringBuilder->changeEncoding('ISO-8859-1');
$this->assertEquals('ISO-8859-1', $this->stringBuilder->getEncoding());
$this->assertNotEquals($this->initialString, $this->stringBuilder->__toString());
$this->assertEquals(iconv('UTF-8', 'ISO-8859-1', $this->initialString), $this->stringBuilder->__toString());
}
/**
* Internal helper function to convert string encodings.
*
* @param string|StringBuilder $string The input string.
* @param string $outputEncoding The output encoding.
*
* @return string
*/
private static function convertString($string, $outputEncoding)
{
if ($string instanceof StringBuilder) {
$inputEncoding = $string->getEncoding();
} else {
$inputEncoding = mb_detect_encoding((string) $string);
}
$string = (string) $string;
if ($inputEncoding != $outputEncoding) {
$string = iconv($inputEncoding, $outputEncoding, $string);
}
return $string;
}