public void ensureInstancesHaveDifferentHashCode() { CommercialCatalogue commercialCatalogue = new CommercialCatalogue("reference", "designation"); CommercialCatalogue otherCommercialCatalogue = new CommercialCatalogue("other reference", "designation"); Assert.NotEqual(commercialCatalogue.GetHashCode(), otherCommercialCatalogue.GetHashCode()); }