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Editing File: /home/ubuntu/code_review/arcanist/src/error/tests/PhutilErrorHandlerTestCase.php

<?php

final class PhutilErrorHandlerTestCase extends PhutilTestCase {

public function testProxyException() {
    $a = new Exception('a');
    $b = new PhutilProxyException('b', $a);
    $c = new PhutilProxyException('c', $b);

$this->assertEqual($a, $b->getPrevious());
    $this->assertEqual($a, PhutilErrorHandler::getRootException($b));
    $this->assertEqual($a, PhutilErrorHandler::getPreviousException($b));

$this->assertEqual($a, PhutilErrorHandler::getRootException($c));
    $this->assertEqual($b, PhutilErrorHandler::getPreviousException($c));
  }

public function testSilenceHandler() {
    // Errors should normally be logged.
    $this->assertTrue(strlen($this->emitError()) > 0);

// The "@" operator should silence errors.
    $this->assertTrue(@strlen($this->emitError()) === 0);
  }

private function emitError() {
    $temporary_log = new TempFile();

$old_log = ini_get('error_log');
    ini_set('error_log', (string)$temporary_log);

trigger_error(pht('(A synthetic error emitted during a unit test.)'));

ini_set('error_log', $old_log);
    return Filesystem::readFile($temporary_log);
  }

}

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