michael@0: // A Set iterator does not iterate over new entries added after it throws StopIteration.
michael@0: 
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: var set = Set();
michael@0: var iter0 = set[std_iterator](), iter1 = set[std_iterator]();
michael@0: assertIteratorDone(iter0, undefined);  // closes iter0
michael@0: set.add("x");
michael@0: assertIteratorDone(iter0, undefined);  // already closed
michael@0: assertIteratorNext(iter1, "x");  // was not yet closed