JSTests/test262/test/language/expressions/array/spread-sngl-expr.js

// This file was procedurally generated from the following sources:
// - src/spread/sngl-expr.case
// - src/spread/default/array.template
/*---
description: Spread operator applied to AssignmentExpression as only element (Array initializer)
esid: sec-runtime-semantics-arrayaccumulation
flags: [generated]
info: |
    SpreadElement : ...AssignmentExpression

    1. Let spreadRef be the result of evaluating AssignmentExpression.
    2. Let spreadObj be ? GetValue(spreadRef).
    3. Let iterator be ? GetIterator(spreadObj).
    4. Repeat
       a. Let next be ? IteratorStep(iterator).
       b. If next is false, return nextIndex.
       c. Let nextValue be ? IteratorValue(next).
       d. Let status be CreateDataProperty(array, ToString(ToUint32(nextIndex)),
          nextValue).
       e. Assert: status is true.
       f. Let nextIndex be nextIndex + 1.

    12.3.6.1 Runtime Semantics: ArgumentListEvaluation

    ArgumentList : ... AssignmentExpression

    1. Let list be an empty List.
    2. Let spreadRef be the result of evaluating AssignmentExpression.
    3. Let spreadObj be GetValue(spreadRef).
    4. Let iterator be GetIterator(spreadObj).
    5. ReturnIfAbrupt(iterator).
    6. Repeat
       a. Let next be IteratorStep(iterator).
       b. ReturnIfAbrupt(next).
       c. If next is false, return list.
       d. Let nextArg be IteratorValue(next).
       e. ReturnIfAbrupt(nextArg).
       f. Append nextArg as the last element of list.
---*/
var source = [2, 3, 4];
var target;

var callCount = 0;

(function() {
  assert.sameValue(arguments.length, 3);
  assert.sameValue(arguments[0], 2);
  assert.sameValue(arguments[1], 3);
  assert.sameValue(arguments[2], 4);
  assert.sameValue(target, source);
  callCount += 1;
}.apply(null, [...target = source]));

assert.sameValue(callCount, 1);