JSTests/test262/test/language/expressions/assignment/dstr/array-rest-nested-obj-undefined-hole.js

// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-rest-nested-obj-undefined-hole.case
// - src/dstr-assignment/default/assignment-expr.template
/*---
description: When DestructuringAssignmentTarget is an array literal and the iterable is an array with a "hole", an array with a single `undefined` element should be used as the value of the nested DestructuringAssignment. (AssignmentExpression)
esid: sec-variable-statement-runtime-semantics-evaluation
features: [destructuring-binding]
flags: [generated]
info: |
    VariableDeclaration : BindingPattern Initializer

    1. Let rhs be the result of evaluating Initializer.
    2. Let rval be GetValue(rhs).
    3. ReturnIfAbrupt(rval).
    4. Return the result of performing BindingInitialization for
       BindingPattern passing rval and undefined as arguments.
---*/
var x = null;
// Use the the top-level lexical scope for 'length' to provide compatibility with browsers
// where length and name are properties of WindowProxy
let length;

var result;
var vals = [ , ];

result = [...{ 0: x, length }] = vals;

assert.sameValue(x, undefined);
assert.sameValue(length, 1);

assert.sameValue(result, vals);