class TEST create make feature {NONE} -- Creation make is -- Run tests. local ti: TWO_WAY_SORTED_SET [INTEGER] ts: TWO_WAY_SORTED_SET [STRING] do create ti.make create ts.make ts.compare_objects ti.extend (1) ti.extend (2) ti.extend (1) ts.extend ("V") ts.extend ("VW") ts.extend ("V") ts.extend (Void) ts.extend (Void) end end