<?php

final class PantsTestEngine extends ArcanistUnitTestEngine {

  public function getEngineConfigurationName() {
    return "pants";
  }

  public function run() {
    $projectRoot = $this->getWorkingCopy()->getProjectRoot();

    $xunit_dir = Filesystem::createTemporaryDirectory();

    $future = $this->buildTestFuture($xunit_dir);
    $future->setCWD($projectRoot);
    list($err, $stdout, $stderr) = $future->resolve();
    
    $results = array();
    $xunit_files = glob(Filesystem::resolvePath($xunit_dir."/*.xml"));
    foreach ($xunit_files as $xunit_file) {
      $results[] = $this->parseTestResults($xunit_file);
    }
    Filesystem::remove($xunit_dir);
    return array_mergev($results);
  }

  public function buildTestFuture($xunit_dir) {
    $paths = $this->getPaths();
    $cmd_line = csprintf('./pants test-changed --test-changed-include-dependees=transitive --test-changed-parent=origin/master --test-pytest-junit-xml-dir=%s', $xunit_dir);
    return new ExecFuture('%C', $cmd_line);
  }

  public function parseTestResults($xunit_file) {
    $parser = new ArcanistXUnitTestResultParser();
    $results = $parser->parseTestResults(Filesystem::readFile($xunit_file));

    return $results;
  }

}