Add a basic arc unit test binding to XHProf

Summary:
This allows "arc unit" to more-or-less run the PHP extension tests in an approximately correct way.

Note that there are two test failures at HEAD on recent PHP, and they've been failing for some time.

Test Plan: Used `arc unit` to run some tests.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D10373

Author: epriestley

.arcconfig

@@ -1,3 +1,5 @@
 {
-  "phabricator.uri": "https://secure.phabricator.com/"
+  "phabricator.uri": "https://secure.phabricator.com/",
+  "load": ["support/libxhprof"],
+  "unit.engine": "XHProfExtensionUnitTestEngine"
 }

.gitignore

@@ -11,3 +11,5 @@ extension/tests/*.out
 extension/tests/*.diff
 extension/tests/*.log
 extension/tests/*.php
+
+support/libxhprof/.phutil_module_cache

support/libxhprof/__phutil_library_init__.php

@@ -0,0 +1,3 @@
+<?php
+
+phutil_register_library('libxhprof', __FILE__);

support/libxhprof/__phutil_library_map__.php

@@ -0,0 +1,18 @@
+<?php
+
+/**
+ * This file is automatically generated. Use 'arc liberate' to rebuild it.
+ *
+ * @generated
+ * @phutil-library-version 2
+ */
+phutil_register_library_map(array(
+  '__library_version__' => 2,
+  'class' => array(
+    'XHProfExtensionUnitTestEngine' => 'unit/XHProfUnitTestEngine.php',
+  ),
+  'function' => array(),
+  'xmap' => array(
+    'XHProfExtensionUnitTestEngine' => 'ArcanistUnitTestEngine',
+  ),
+));

support/libxhprof/unit/XHProfUnitTestEngine.php

@@ -0,0 +1,53 @@
+<?php
+
+final class XHProfExtensionUnitTestEngine extends ArcanistUnitTestEngine {
+
+  public function run() {
+    $root = $this->getWorkingCopy()->getProjectRoot().'/extension/';
+
+    $start_time = microtime(true);
+
+    id(new ExecFuture('phpize && ./configure && make -j4'))
+      ->setCWD($root)
+      ->resolvex();
+
+    $out = id(new ExecFuture('make -f Makefile.local test_with_exit_status'))
+      ->setCWD($root)
+      ->setEnv(
+        array(
+          'TEST_PHP_ARGS' => '-q',
+        ))
+      ->resolvex();
+
+    // NOTE: REPORT_EXIT_STATUS doesn't seem to work properly in some versions
+    // of PHP. Just "parse" stdout to approximate the results.
+
+    list($stdout) = $out;
+
+    $tests = array();
+
+    foreach (phutil_split_lines($stdout) as $line) {
+      $matches = null;
+
+      // NOTE: The test script writes the name of the test originally, then
+      // uses "\r" to erase it and write the result. This splits as a single
+      // line.
+      if (preg_match('/^TEST .*\r(PASS|FAIL) (.*)/', $line, $matches)) {
+        if ($matches[1] == 'PASS') {
+          $result = ArcanistUnitTestResult::RESULT_PASS;
+        } else {
+          $result = ArcanistUnitTestResult::RESULT_FAIL;
+        }
+
+        $name = trim($matches[2]);
+
+        $tests[] = id(new ArcanistUnitTestResult())
+          ->setName($name)
+          ->setResult($result)
+          ->setDuration(microtime(true) - $start_time);
+      }
+    }
+
+    return $tests;
+  }
+}