text: // Copyright (C) 2016 Rick Waldron. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  author: Rick Waldron
  esid: sec-unary-operators
  description: Exponentiation Operator expression precedence of unary operators
  info: |
    ExponentiationExpression :
      UnaryExpression
      ...
  
    UnaryExpression :
      ...
      `delete` UnaryExpression
      `void` UnaryExpression
      `typeof` UnaryExpression
      `+` UnaryExpression
      `-` UnaryExpression
      `~` UnaryExpression
      `!` UnaryExpression
  ---*/
  
  assert.sameValue(-(3 ** 2), -9, "-(3 ** 2) === -9");
  assert.sameValue(+(3 ** 2), 9, "+(3 ** 2) === 9");
  assert.sameValue(~(3 ** 2), -10, "~(3 ** 2) === -10");
  assert.sameValue(!(3 ** 2), false, "!(3 ** 2) === false");
  
  
  assert.sameValue(2 ** -2, 0.25);
  
  var o = { p: 1 };
  
  assert.sameValue(2 ** delete o.p, 2, "delete o.p -> true -> ToNumber(true) -> 1");
  assert.sameValue(2 ** void 1, NaN, "void 1 -> undefined -> ToNumber(undefined) -> NaN");
  assert.sameValue(2 ** typeof 1, NaN, "typeof 1 -> 'number' -> ToNumber('number') -> NaN");
  
  var s = "2";
  var n = 2;
  
  assert.sameValue(2 ** +s, 4, "+s -> +'2' -> 2 -> ToNumber(2) -> 2");
  assert.sameValue(2 ** +n, 4, "+s -> +2 -> 2 -> ToNumber(2) -> 2");
  
  assert.sameValue(2 ** -s, 0.25, "-s -> -'2' -> -2 -> ToNumber(-2) -> -2");
  assert.sameValue(2 ** -n, 0.25, "-s -> -2 -> -2 -> ToNumber(-2) -> -2");
  
  assert.sameValue(2 ** ~s, 0.125, "~s -> ~'2' -> -3 -> ToNumber(-3) -> -3");
  assert.sameValue(2 ** ~n, 0.125, "~s -> ~2 -> -3 -> ToNumber(-3) -> -3");
  
  assert.sameValue(2 ** !s, 1, "!s -> !'2' -> false -> ToNumber(false) -> 0");
  assert.sameValue(2 ** !n, 1, "!s -> !2 -> false -> ToNumber(false) -> 0");
  
  
  var capture = [];
  var leftValue = { valueOf() { capture.push("leftValue"); return 3; }};
  var rightValue = { valueOf() { capture.push("rightValue"); return 2; }};
  
  (capture.push("left"), leftValue) ** +(capture.push("right"), rightValue);
  //                                   ^
  //                            Changes the order
  
  // Expected per operator evaluation order: "left", "right", "rightValue", "leftValue"
  assert.sameValue(capture[0], "left", "Expected the 1st element captured to be 'left'");
  assert.sameValue(capture[1], "right", "Expected the 2nd element captured to be 'right'");
  assert.sameValue(capture[2], "rightValue", "Expected the 3rd element captured to be 'rightValue'");
  assert.sameValue(capture[3], "leftValue", "Expected the 4th element captured to be 'leftValue'");
  