private function assertGraphState($numberOfPersons, $numberOfSkills, $numberOfCompanies)
{
$personsCount = $this->client->run('MATCH (n:Person) RETURN count(*) as c')->firstRecord()->get('c');
$skillsCount = $this->client->run('MATCH (n:Skill) RETURN count(*) as c')->firstRecord()->get('c');
$companiesCount = $this->client->run('MATCH (n:Company) RETURN count(*) as c')->firstRecord()->get('c');
$this->assertEquals($numberOfPersons, $personsCount);
$this->assertEquals($numberOfSkills, $skillsCount);
$this->assertEquals($numberOfCompanies, $companiesCount);
}