text: // Copyright (c) 2016 the V8 project authors. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  /*---
  esid: sec-date-value
  es6id: 20.3.2.2
  description: >
      Behavior when coercion via `Symbol.toPrimitive` yields a primitive value
  info: |
    [...]
    3. If NewTarget is not undefined, then
       a. If Type(value) is Object and value has a [[DateValue]] internal slot,
          then
          [...]
       b. Else,
          i. Let v be ? ToPrimitive(value).
  
      ES6 Section 7.1.1 ToPrimitive ( input [, PreferredType] )
  
      [...]
      4. Let exoticToPrim be GetMethod(input, @@toPrimitive).
      5. ReturnIfAbrupt(exoticToPrim).
      6. If exoticToPrim is not undefined, then
         a. Let result be Call(exoticToPrim, input, «hint»).
         b. ReturnIfAbrupt(result).
         c. If Type(result) is not Object, return result.
  features: [Symbol.toPrimitive]
  ---*/
  
  var y = {};
  var retVal;
  
  y[Symbol.toPrimitive] = function() {
    return retVal;
  };
  
  retVal = 1234;
  assert.sameValue(new Date(y).valueOf(), 1234);
  
  retVal = '2016-06-03T19:03:52.872Z';
  assert.sameValue(new Date(y).valueOf(), 1464980632872);
  
  retVal = Symbol.toPrimitive;
  assert.throws(TypeError, function() {
    new Date(y);
  });
  