// Copyright (C) 2017 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: |
    Collection of assertion functions used throughout test262
---*/

function assert(mustBeTrue, message) {
  if (mustBeTrue === true) {
    return;
  }

  if (message === undefined) {
    message = 'Expected true but got ' + String(mustBeTrue);
  }
  $ERROR(message);
}

assert._isSameValue = function (a, b) {
  if (a === b) {
    // Handle +/-0 vs. -/+0
    return a !== 0 || 1 / a === 1 / b;
  }

  // Handle NaN vs. NaN
  return a !== a && b !== b;
};

assert.sameValue = function (actual, expected, message) {
  if (assert._isSameValue(actual, expected)) {
    return;
  }

  if (message === undefined) {
    message = '';
  } else {
    message += ' ';
  }

  message += 'Expected SameValue(«' + String(actual) + '», «' + String(expected) + '») to be true';

  $ERROR(message);
};

assert.notSameValue = function (actual, unexpected, message) {
  if (!assert._isSameValue(actual, unexpected)) {
    return;
  }

  if (message === undefined) {
    message += ' ';
  }

  message += 'Expected SameValue(«' + String(actual) + '», «' + String(unexpected) + '») to be false';

  $ERROR(message);
};

assert.throws = function (expectedErrorConstructor, func, message) {
  if (typeof func !== "function") {
    $ERROR('assert.throws requires two arguments: the error constructor ' +
      'and a function to run');
    return;
  }
  if (message === undefined) {
    message = '';
  } else {
    message += ' ';
  }

  try {
    func();
  } catch (thrown) {
    if (typeof thrown !== 'object' || thrown === null) {
      message += 'Thrown value was not an object!';
      $ERROR(message);
    } else if (thrown.constructor !== expectedErrorConstructor) {
      message += 'Expected a ' + expectedErrorConstructor.name + ' but got a ' + thrown.constructor.name;
      $ERROR(message);
    }
    return;
  }

  message += 'Expected a ' + expectedErrorConstructor.name + ' to be thrown but no exception was thrown at all';
  $ERROR(message);
};
// Copyright (C) 2017 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: |
    Collection of functions used to safely verify the correctness of
    property descriptors.
---*/

function verifyProperty(obj, name, desc, options) {
  assert(
    arguments.length > 2,
    'verifyProperty should receive at least 3 arguments: obj, name, and descriptor'
  );

  var originalDesc = Object.getOwnPropertyDescriptor(obj, name);
  var nameStr = String(name);

  // Allows checking for undefined descriptor if it's explicitly given.
  if (desc === undefined) {
    assert.sameValue(
      originalDesc,
      undefined,
      "obj['" + nameStr + "'] descriptor should be undefined"
    );

    // desc and originalDesc are both undefined, problem solved;
    return true;
  }

  assert(
    Object.prototype.hasOwnProperty.call(obj, name),
    "obj should have an own property " + nameStr
  );

  assert.notSameValue(
    desc,
    null,
    "The desc argument should be an object or undefined, null"
  );

  assert.sameValue(
    typeof desc,
    "object",
    "The desc argument should be an object or undefined, " + String(desc)
  );

  var failures = [];

  if (Object.prototype.hasOwnProperty.call(desc, 'value')) {
    if (desc.value !== originalDesc.value) {
      failures.push("descriptor value should be " + desc.value);
    }
  }

  if (Object.prototype.hasOwnProperty.call(desc, 'enumerable')) {
    if (desc.enumerable !== originalDesc.enumerable ||
        desc.enumerable !== isEnumerable(obj, name)) {
      failures.push('descriptor should ' + (desc.enumerable ? '' : 'not ') + 'be enumerable');
    }
  }

  if (Object.prototype.hasOwnProperty.call(desc, 'writable')) {
    if (desc.writable !== originalDesc.writable ||
        desc.writable !== isWritable(obj, name)) {
      failures.push('descriptor should ' + (desc.writable ? '' : 'not ') + 'be writable');
    }
  }

  if (Object.prototype.hasOwnProperty.call(desc, 'configurable')) {
    if (desc.configurable !== originalDesc.configurable ||
        desc.configurable !== isConfigurable(obj, name)) {
      failures.push('descriptor should ' + (desc.configurable ? '' : 'not ') + 'be configurable');
    }
  }

  assert(!failures.length, failures.join('; '));

  if (options && options.restore) {
    Object.defineProperty(obj, name, originalDesc);
  }

  return true;
}

function isConfigurable(obj, name) {
  try {
    delete obj[name];
  } catch (e) {
    if (!(e instanceof TypeError)) {
      $ERROR("Expected TypeError, got " + e);
    }
  }
  return !Object.prototype.hasOwnProperty.call(obj, name);
}

function isEnumerable(obj, name) {
  var stringCheck = false;

  if (typeof name === "string") {
    for (var x in obj) {
      if (x === name) {
        stringCheck = true;
        break;
      }
    }
  } else {
    // skip it if name is not string, works for Symbol names.
    stringCheck = true;
  }

  return stringCheck &&
    Object.prototype.hasOwnProperty.call(obj, name) &&
    Object.prototype.propertyIsEnumerable.call(obj, name);
}

function isEqualTo(obj, name, expectedValue) {
  var actualValue = obj[name];

  return assert._isSameValue(actualValue, expectedValue);
}

function isWritable(obj, name, verifyProp, value) {
  var newValue = value || "unlikelyValue";
  var hadValue = Object.prototype.hasOwnProperty.call(obj, name);
  var oldValue = obj[name];
  var writeSucceeded;

  try {
    obj[name] = newValue;
  } catch (e) {
    if (!(e instanceof TypeError)) {
      $ERROR("Expected TypeError, got " + e);
    }
  }

  writeSucceeded = isEqualTo(obj, verifyProp || name, newValue);

  // Revert the change only if it was successful (in other cases, reverting
  // is unnecessary and may trigger exceptions for certain property
  // configurations)
  if (writeSucceeded) {
    if (hadValue) {
      obj[name] = oldValue;
    } else {
      delete obj[name];
    }
  }

  return writeSucceeded;
}

function verifyEqualTo(obj, name, value) {
  if (!isEqualTo(obj, name, value)) {
    $ERROR("Expected obj[" + String(name) + "] to equal " + value +
           ", actually " + obj[name]);
  }
}

function verifyWritable(obj, name, verifyProp, value) {
  if (!verifyProp) {
    assert(Object.getOwnPropertyDescriptor(obj, name).writable,
         "Expected obj[" + String(name) + "] to have writable:true.");
  }
  if (!isWritable(obj, name, verifyProp, value)) {
    $ERROR("Expected obj[" + String(name) + "] to be writable, but was not.");
  }
}

function verifyNotWritable(obj, name, verifyProp, value) {
  if (!verifyProp) {
    assert(!Object.getOwnPropertyDescriptor(obj, name).writable,
         "Expected obj[" + String(name) + "] to have writable:false.");
  }
  if (isWritable(obj, name, verifyProp)) {
    $ERROR("Expected obj[" + String(name) + "] NOT to be writable, but was.");
  }
}

function verifyEnumerable(obj, name) {
  assert(Object.getOwnPropertyDescriptor(obj, name).enumerable,
       "Expected obj[" + String(name) + "] to have enumerable:true.");
  if (!isEnumerable(obj, name)) {
    $ERROR("Expected obj[" + String(name) + "] to be enumerable, but was not.");
  }
}

function verifyNotEnumerable(obj, name) {
  assert(!Object.getOwnPropertyDescriptor(obj, name).enumerable,
       "Expected obj[" + String(name) + "] to have enumerable:false.");
  if (isEnumerable(obj, name)) {
    $ERROR("Expected obj[" + String(name) + "] NOT to be enumerable, but was.");
  }
}

function verifyConfigurable(obj, name) {
  assert(Object.getOwnPropertyDescriptor(obj, name).configurable,
       "Expected obj[" + String(name) + "] to have configurable:true.");
  if (!isConfigurable(obj, name)) {
    $ERROR("Expected obj[" + String(name) + "] to be configurable, but was not.");
  }
}

function verifyNotConfigurable(obj, name) {
  assert(!Object.getOwnPropertyDescriptor(obj, name).configurable,
       "Expected obj[" + String(name) + "] to have configurable:false.");
  if (isConfigurable(obj, name)) {
    $ERROR("Expected obj[" + String(name) + "] NOT to be configurable, but was.");
  }
}
// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: |
    Provides both:

    - An error class to avoid false positives when testing for thrown exceptions
    - A function to explicitly throw an exception using the Test262Error class
---*/


function Test262Error(message) {
  this.message = message || "";
}

Test262Error.prototype.toString = function () {
  return "Test262Error: " + this.message;
};

var $ERROR;
$ERROR = function $ERROR(message) {
  throw new Test262Error(message);
};
// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.fill
es6id: 22.1.3.6
description: >
  Return abrupt from ToLength(Get(O, "length")).
info: |
  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )

  1. Let O be ToObject(this value).
  2. ReturnIfAbrupt(O).
  3. Let len be ToLength(Get(O, "length")).
  4. ReturnIfAbrupt(len).
---*/

var o1 = {};

Object.defineProperty(o1, 'length', {
  get: function() {
    throw new Test262Error();
  },
  configurable: true
});
assert.throws(Test262Error, function() {
  [].fill.call(o1, 1);
});

var o2 = {
  length: {
    valueOf: function() {
      throw new Test262Error();
    }
  }
};
assert.throws(Test262Error, function() {
  [].fill.call(o2, 1);
});
// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.fill
es6id: 22.1.3.6
description: >
  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
info: |
  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )

  1. Let O be ToObject(this value).
  2. ReturnIfAbrupt(O).
  3. Let len be ToLength(Get(O, "length")).
  4. ReturnIfAbrupt(len).
features: [Symbol]
---*/

var o = {};

o.length = Symbol(1);

// value argument is given to avoid false positives
assert.throws(TypeError, function() {
  [].fill.call(o, 1);
});