assert.equal(8, 2 ** 3);
assert.equal(24, 3 * 2 ** 3);
var x = 2;
assert.equal(8, 2 ** ++x);
assert.equal(1, 2 ** -1 * 2);

var calls = 0;
var q = {q: 3};
var o = {
  get p() {
    calls++;
    return q;
  }
};

o.p.q **= 2;
assert.equal(1, calls);
assert.equal(9, o.p.q);

assert.equal(512, 2 ** (3 ** 2));
assert.equal(512, 2 ** 3 ** 2);