public function testCharCodeAt()
{
$str = new Str("Hello, world.");
$this->assertEquals($str->charCodeAt(0), ord("H"));
$this->assertNotEquals($str->charCodeAt(5), ord(" "));
$this->assertEquals($str->charCodeAt($str->length() - 1), ord("."));
try {
$str->charCodeAt(-1);
} catch (StrIndexOutOfBoundsException $ex1) {
$this->assertEquals(get_class($ex1), 'Str\\StrIndexOutOfBoundsException');
}
try {
$str->charCodeAt($str->length());
} catch (StrIndexOutOfBoundsException $ex2) {
$this->assertEquals(get_class($ex2), 'Str\\StrIndexOutOfBoundsException');
}
}
