tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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iterator-proto-1.js (642B)

      1 // All iterators of the same collection type share their immediate prototype.
      2 // Those prototype objects in turn inherit directly from %IteratorPrototype%.
      3 
      4 load(libdir + "iteration.js");
      5 
      6 // Get %IteratorPrototype%.
      7 var iterProto = Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]()));
      8 
      9 function test(obj0, obj1) {
     10    var iter0 = obj0[Symbol.iterator](), iter1 = obj1[Symbol.iterator]();
     11    var proto = Object.getPrototypeOf(iter0);
     12    assertEq(Object.getPrototypeOf(iter1), proto);
     13    assertEq(Object.getPrototypeOf(proto), iterProto);
     14 }
     15 
     16 test([], [1]);
     17 test(new Map(), new Map([[1, 1]]));
     18 test(new Set(), new Set([1]));