Implementation of tests concerning the Delete operation of the ManyToOne/OneToMany association
Implementation of tests concerning the Delete operation of the ManyToMany association (Close #5 )
Modification and implementation of new tests concerning the Update operation of the ManyToOne/OneToMany association
Fix a problem on the Update operation of the ManyToOne / OneToMany association. Now it is possible to
delete a relationship between 2 instances by allowing the reference to be changed to a NULL value.