Unit of work changeset computation test

tests/Doctrine/Performance/ChangeSet/UnitOfWorkComputeChangesBench.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace Doctrine\Performance\ChangeSet;
+
+use Doctrine\ORM\Query;
+use Doctrine\ORM\UnitOfWork;
+use Doctrine\Performance\EntityManagerFactory;
+use Doctrine\Tests\Mocks\HydratorMockStatement;
+use Doctrine\Tests\Models\CMS\CmsUser;
+use PhpBench\Benchmark\Metadata\Annotations\BeforeMethods;
+
+/**
+ * @BeforeMethods({"init"})
+ */
+final class UnitOfWorkComputeChangesBench
+{
+    /**
+     * @var CmsUser[]
+     */
+    private $users;
+
+    /**
+     * @var UnitOfWork
+     */
+    private $unitOfWork;
+
+    public function init()
+    {
+        $this->unitOfWork = EntityManagerFactory::getEntityManager([])->getUnitOfWork();
+
+        for ($i = 1; $i <= 100; ++$i) {
+            $user           = new CmsUser;
+            $user->id       = $i;
+            $user->status   = 'user';
+            $user->username = 'user' . $i;
+            $user->name     = 'Mr.Smith-' . $i;
+            $this->users[]  = $user;
+
+            $this->unitOfWork->registerManaged(
+                $user,
+                [
+                    'id' => $i,
+                ],
+                [
+                    'id'       => $user->id,
+                    'status'   => $user->status,
+                    'username' => $user->username,
+                    'name'     => $user->name,
+                    'address'  => $user->address,
+                    'email'    => $user->email,
+                ]
+            );
+        }
+
+        $this->unitOfWork->computeChangeSets();
+
+        if ($this->unitOfWork->getScheduledEntityUpdates()) {
+            throw new \LogicException('Unit of work should be clean at this stage');
+        }
+
+        foreach ($this->users AS $user) {
+            $user->status    = 'other';
+            $user->username .= '++';
+            $user->name      = str_replace('Mr.', 'Mrs.', $user->name);
+        }
+    }
+
+    public function benchChangeSetComputation()
+    {
+        $this->unitOfWork->computeChangeSets();
+    }
+}
+