tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Object-preventExtensions-01.js (509B)

      1 // Basic preventExtensions test.
      2 
      3 var g = newGlobal({newCompartment: true});
      4 var obj = g.eval("({x: 1})");
      5 assertEq(g.Object.isExtensible(obj), true);
      6 
      7 var dbg = new Debugger;
      8 var gw = dbg.addDebuggee(g);
      9 var objw = gw.makeDebuggeeValue(obj);
     10 assertEq(objw.isExtensible(), true);
     11 
     12 assertEq(objw.preventExtensions(), undefined);
     13 assertEq(g.Object.isExtensible(obj), false);
     14 assertEq(objw.isExtensible(), false);
     15 
     16 // Calling preventExtensions again has no effect.
     17 assertEq(objw.preventExtensions(), undefined);