def test_virtual_machine_vm_id():
vm = VirtualMachine()
vm_object_mock = mock.MagicMock()
vm_object_mock.summary.vm = "'vim.VirtualMachine:vm-83288'"
vm.__setattr__('_vm_object', vm_object_mock)
vm_id = vm.vm_id()
assert vm_id == 'vm-83288'
def test_virtual_machine_vm_id_return_none():
vm = VirtualMachine()
vm_id = vm.vm_id()
assert vm_id is None
