JSTests/test262/test/language/block-scope/shadowing/lookup-in-and-through-block-contexts.js

// Copyright (C) 2011 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 13.1
description: >
    lookup in and through block contexts
---*/
function fn(one) {
  var x = one + 1;
  let y = one + 2;
  const u = one + 4;
  {
    let z = one + 3;
    const v = one + 5;
    assert.sameValue(one, 1);
    assert.sameValue(x, 2);
    assert.sameValue(y, 3);
    assert.sameValue(z, 4);
    assert.sameValue(u, 5);
    assert.sameValue(v, 6);
  }
}

fn(1);