public function testCanCheckIfGroupExists()
{
$this->assertFalse($this->adapter->groupExists('g1'));
$this->assertFalse($this->adapter->groupExists('g2'));
$this->assertFalse($this->adapter->groupExists('g3'));
$this->adapter->addResourceGroup('g1');
$this->adapter->addResourceGroup('g2');
$this->assertTrue($this->adapter->groupExists('g1'));
$this->assertTrue($this->adapter->groupExists('g2'));
$this->assertFalse($this->adapter->groupExists('g3'));
}