Alcaeus\MongoDbAdapter\Tests\TestCase::prepareData PHP Method

    protected function prepareData()
    {
        $collection = $this->getCollection();
        $document = ['foo' => 'bar'];
        $collection->insert($document);
        unset($document['_id']);
        $collection->insert($document);
        $document = ['foo' => 'foo'];
        $collection->insert($document);
        return $collection;
    }