Checks that invalid multi-byte sequences are rejected.
function testInvalidMultiByte() {
// Ignore PHP 5.3+ invalid multibyte sequence warning.
$text = @check_plain("");
$this
->assertEqual($text, '', 'check_plain() rejects invalid sequence "Foo\\xC0barbaz"');
// Ignore PHP 5.3+ invalid multibyte sequence warning.
$text = @check_plain("");
$this
->assertEqual($text, '', 'check_plain() rejects invalid sequence "\\xc2\\""');
$text = check_plain("Fooÿñ");
$this
->assertEqual($text, "Fooÿñ", 'check_plain() accepts valid sequence "Fooÿñ"');
$text = filter_xss("");
$this
->assertEqual($text, '', 'filter_xss() rejects invalid sequence "Foo\\xC0barbaz"');
$text = filter_xss("Fooÿñ");
$this
->assertEqual($text, "Fooÿñ", 'filter_xss() accepts valid sequence Fooÿñ');
}