transplant-window-proxy-1.js

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// Test transplanting the script's top-level WindowProxy.

var id = 1;

assertEq(objectGlobal(globalThis), globalThis); // Not a CCW.

// Turn the WindowProxy into a CCW for a WindowProxy in a new compartment.

var g2 = newGlobal({newCompartment: true, transplantWindowProxy: this});

g2.evaluate("var id = 2");

assertEq(objectGlobal(globalThis), null); // Now it's a CCW.

assertEq(id, 1);

assertEq(globalThis.id, 2);

// Same thing for another new compartment.

var g3 = newGlobal({newCompartment: true, transplantWindowProxy: this});

g3.evaluate("var id = 3");

assertEq(objectGlobal(globalThis), null); // Still a CCW.

assertEq(id, 1);

assertEq(globalThis.id, 3);

// The CCW becomes a WindowProxy in the original compartment.

var g4 = newGlobal({newCompartment: false, transplantWindowProxy: this});

g4.evaluate("var id = 4");

assertEq(objectGlobal(globalThis), globalThis); // Not a CCW anymore.

assertEq(id, 1);

assertEq(globalThis.id, 4);

// And back to a CCW.

var g5 = newGlobal({newCompartment: true, transplantWindowProxy: this});

g5.evaluate("var id = 5");

assertEq(objectGlobal(globalThis), null); // Again a CCW.

assertEq(id, 1);

assertEq(globalThis.id, 5);

assertEq(globalThis, g2);

assertEq(globalThis, g3);

assertEq(globalThis, g4);

assertEq(globalThis, g5);

// An exception is thrown for non-WindowProxy objects.

var plainGlobal = newGlobal({useWindowProxy: false});

var exc = null;

try {

  newGlobal({transplantWindowProxy: plainGlobal});

} catch (e) {

  exc = e;

assertEq(exc.toString().includes("not a WindowProxy"), true);