hphp/test/quick/exception_set_previous_chain.php

   1 <?hh
   2
   3 $e0 = new Exception('0');
   4 $e1 = new Exception('1');
   5 $e2 = new Exception('2');
   6 $e1->setPrevious($e2);
   7 $e0->setPrevious($e1);
   8
   9 $eA = new Exception('A');
  10 $eB = new Exception('B');
  11 $eC = new Exception('C');
  12 $eB->setPrevious($eC);
  13 $eA->setPrevious($eB);
  14
  15 $e0->setPreviousChain($eA);
  16
  17 $proper_order = '012ABC';
  18 $actual_order = $e0->getMessage();
  19
  20 $cur = $e0;
  21 while ($cur->getPrevious() !== null) {
  22   $cur = $cur->getPrevious();
  23   $actual_order .= $cur->getMessage();
  24 }
  25
  26 $result = $actual_order === $proper_order ? 'pass' : 'fail';
  27
  28 echo "{$result}\n";