public void RemoveSubTransaction_NoSubtransaction()
        {
            Assert.That(_manager.IsWriteable, Is.True);
            Assert.That(_manager.SubTransaction, Is.Null);
            _hierarchyStrictMock.Stub(stub => stub.LeafTransaction).Return(_thisTransaction);

            _manager.RemoveSubTransaction();

            Assert.That(_manager.IsWriteable, Is.True);
            Assert.That(_manager.SubTransaction, Is.Null);
        }