michael@0: // The argument to Set may contain a value multiple times. Duplicates are discarded.
michael@0: 
michael@0: assertEq(Set(["testing", "testing", 123]).size, 2);
michael@0: 
michael@0: var values = [undefined, null, false, NaN, 0, -0, 6.022e23, -Infinity, "", "xyzzy", {}, Math.sin];
michael@0: for (let v of values) {
michael@0:     var a = [v, {}, {}, {}, v, {}, v, v];
michael@0:     var s = Set(a);
michael@0:     assertEq(s.size, 5);
michael@0:     assertEq(s.has(v), true);
michael@0: }