windowproxy-transplant.js

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// Test GetProp and SetProp on (transplanted) WindowProxy objects.

function test(sameCompartment) {

  let g1 = newGlobal({newCompartment: true});

  g1.evaluate(`

    var x = 10;

    function incX() {

      for (var i = 0; i < 100; i++) {

        x = x + 1; // Always g1.

        globalThis.x = globalThis.x + 1; // The WindowProxy's current global.

      return x;

`);

  // g1 is the WindowProxy's active Window so g1.x is incremented 200 times.

  let incX = g1.incX;

  assertEq(incX(), 210);

  assertEq(g1.x, 210);

  let g2 =

    sameCompartment

      ? newGlobal({sameCompartmentAs: g1, transplantWindowProxy: g1})

      : newGlobal({newCompartment: true, transplantWindowProxy: g1});

  assertEq(g1, g2);

  g2.evaluate("var x = 20;");

  // Now g2 is the WindowProxy's active Window so g1.x (for the original g1) and

  // g2.x are each incremented 100 times.

  assertEq(incX(), 310);

  assertEq(g2.x, 120);

test(false);

test(true);