michael@0: // Clearing a Set removes its elements; the Set remains usable afterwards.
michael@0: 
michael@0: var s = Set(["x", "y", "z", "z", "y"]);
michael@0: assertEq(s.size, 3);
michael@0: s.clear();
michael@0: assertEq(s.size, 0);
michael@0: assertEq(s.has("x"), false);
michael@0: assertEq(s.delete("x"), false);
michael@0: assertEq(s.has("z"), false);
michael@0: for (var v of s)
michael@0:     throw "FAIL";  // shouldn't be any elements
michael@0: 
michael@0: s.add("y");
michael@0: assertEq(s.size, 1);
michael@0: assertEq(s.has("x"), false);
michael@0: assertEq(s.has("z"), false);