JSTests/test262/test/language/block-scope/shadowing/parameter-name-shadowing-parameter-name-let-const-and-var.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: >
    parameter name shadowing parameter name, let, const and var
---*/
function fn(a) {
  let b = 1;
  var c = 1;
  const d = 1;

  (function(a, b, c, d) {
    a = 2;
    b = 2;
    c = 2;
    d = 2;

    assert.sameValue(a, 2);
    assert.sameValue(b, 2);
    assert.sameValue(c, 2);
    assert.sameValue(d, 2);
  })(1, 1);

  assert.sameValue(a, 1);
  assert.sameValue(b, 1);
  assert.sameValue(c, 1);
  assert.sameValue(d, 1);
}

fn(1);