--TEST--
Basic UConverter::convert() w/ Subsitution
--SKIPIF--
<?php if( !extension_loaded( 'intl' ) ) print 'skip'; ?>
--INI--
intl.use_exceptions=false
--FILE--
<?php
$c = new UConverter('ascii', 'utf-8');

foreach(array('?','','<unknown>') as $subst) {
  if (!$c->setSubstChars($subst)) {
    echo "**Disallowed\n";
    continue;
  }
  var_dump($c->convert("This is an ascii string"));
  var_dump($c->convert("Snowman: (\xE2\x98\x83)"));
}

--EXPECT--
string(23) "This is an ascii string"
string(12) "Snowman: (?)"
**Disallowed
**Disallowed