michael@0: // Each Set has its own size.
michael@0: 
michael@0: var s1 = Set(), s2 = Set();
michael@0: for (var i = 0; i < 30; i++)
michael@0:     s1.add(i);
michael@0: assertEq(s1.size, 30);
michael@0: assertEq(s2.size, 0);