public function testUpdateOne()
{
$collection = $this->getCollection();
$batch = new \MongoUpdateBatch($collection);
$document = ['foo' => 'bar'];
$collection->insert($document);
$this->assertTrue($batch->add(['q' => ['foo' => 'bar'], 'u' => ['$set' => ['foo' => 'foo']]]));
$expected = ['nMatched' => 1, 'nModified' => 1, 'nUpserted' => 0, 'ok' => true];
$this->assertSame($expected, $batch->execute());
$newCollection = $this->getCheckDatabase()->selectCollection('test');
$this->assertSame(1, $newCollection->count());
$record = $newCollection->findOne();
$this->assertNotNull($record);
$this->assertObjectHasAttribute('foo', $record);
$this->assertAttributeSame('foo', 'foo', $record);
}