// Setting a Map key to undefined, or a missing argument, isn't the same as deleting it. | |
var m = new Map; | |
m.set(42, undefined); | |
assertEq(m.has(42), true); | |
assertEq(m.get(42), undefined); | |
m.set(42, "wrong"); | |
m.set(42); | |
assertEq(m.has(42), true); | |
assertEq(m.get(42), undefined); | |
m.set(); | |
assertEq(m.has(undefined), true); | |
assertEq(m.get(undefined), undefined); |