| // The argument to WeakMap can be a iterable object. |
| |
| load(libdir + "iteration.js"); |
| |
| var k1 = {}; |
| var v1 = 42; |
| var k2 = {}; |
| var v2 = 43; |
| var k3 = {}; |
| |
| var done = false; |
| |
| var iterable = {}; |
| iterable[Symbol.iterator] = function*() { |
| yield [k1, v1]; |
| yield [k2, v2]; |
| done = true; |
| }; |
| var m = new WeakMap(iterable); |
| |
| assertEq(done, true); // the constructor consumes the argument |
| assertEq(m.has(k1), true); |
| assertEq(m.has(k2), true); |
| assertEq(m.has(k3), false); |
| assertEq(m.get(k1), v1); |
| assertEq(m.get(k2), v2); |
| assertEq(m.get(k3), undefined); |
| |
