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   1  <?php
   2  
   3  final class DifferentialDiffTestCase extends ArcanistPhutilTestCase {
   4  
   5    public function testDetectCopiedCode() {
   6      $root = dirname(__FILE__).'/diff/';
   7      $parser = new ArcanistDiffParser();
   8  
   9      $diff = DifferentialDiff::newFromRawChanges(
  10        PhabricatorUser::getOmnipotentUser(),
  11        $parser->parseDiff(Filesystem::readFile($root.'lint_engine.diff')));
  12      $copies = idx(head($diff->getChangesets())->getMetadata(), 'copy:lines');
  13  
  14      $this->assertEqual(
  15        array_combine(range(237, 252), range(167, 182)),
  16        ipull($copies, 1));
  17    }
  18  
  19    public function testDetectSlowCopiedCode() {
  20      // This tests that the detector has a reasonable runtime when a diff
  21      // contains a very large number of identical lines. See T5041.
  22  
  23      $parser = new ArcanistDiffParser();
  24  
  25      $line = str_repeat('x', 60);
  26      $oline = '-'.$line."\n";
  27      $nline = '+'.$line."\n";
  28  
  29      $n = 1000;
  30      $oblock = str_repeat($oline, $n);
  31      $nblock = str_repeat($nline, $n);
  32  
  33      $raw_diff = <<<EODIFF
  34  diff --git a/dst b/dst
  35  new file mode 100644
  36  index 0000000..1234567
  37  --- /dev/null
  38  +++ b/dst
  39  @@ -0,0 +1,{$n} @@
  40  {$nblock}
  41  diff --git a/src b/src
  42  deleted file mode 100644
  43  index 123457..0000000
  44  --- a/src
  45  +++ /dev/null
  46  @@ -1,{$n} +0,0 @@
  47  {$oblock}
  48  EODIFF;
  49  
  50      $diff = DifferentialDiff::newFromRawChanges(
  51        PhabricatorUser::getOmnipotentUser(),
  52        $parser->parseDiff($raw_diff));
  53  
  54      $this->assertTrue(true);
  55    }
  56  
  57  
  58  }