public function testGetAndSetCustomerGroupId()
{
$groupId = 5;
$propertyGroupId = 6;
$setValue = 8;
$this->customerSession->expects($this->once())->method('getCustomerGroupId')->will($this->returnValue($groupId));
$property = new \ReflectionProperty($this->item, 'customerGroupId');
$property->setAccessible(true);
$this->assertNull($property->getValue($this->item));
$this->assertSame($groupId, $this->item->getCustomerGroupId());
$this->assertNull($property->getValue($this->item));
$property->setValue($this->item, $propertyGroupId);
$this->assertSame($propertyGroupId, $property->getValue($this->item));
$this->assertSame($propertyGroupId, $this->item->getCustomerGroupId());
$this->assertSame($this->item, $this->item->setCustomerGroupId($setValue));
$this->assertSame($setValue, $property->getValue($this->item));
$this->assertSame($setValue, $this->item->getCustomerGroupId());
}
