/*
 * Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/licenses/publicdomain/
 */

// All NaNs must be treated as identical keys for Set.

// Avoid constant-folding that would happen were |undefined| to be used.
var key = -/a/g.missingProperty;

var s = new Set();
s.add(key, 17);
assertEq(s.has(key), true);
assertEq(s.has(-key), true);
assertEq(s.has(NaN), true);

s.delete(-key);
assertEq(s.has(key), false);
assertEq(s.has(-key), false);
assertEq(s.has(NaN), false);

s.add(-key, 17);
assertEq(s.has(key), true);
assertEq(s.has(-key), true);
assertEq(s.has(NaN), true);

s.delete(NaN);
assertEq(s.has(key), false);
assertEq(s.has(-key), false);
assertEq(s.has(NaN), false);

s.add(NaN, 17);
assertEq(s.has(key), true);
assertEq(s.has(-key), true);
assertEq(s.has(NaN), true);

s.delete(key);
assertEq(s.has(key), false);
assertEq(s.has(-key), false);
assertEq(s.has(NaN), false);