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());
 }