v8/test/mjsunit/regress/regress-2273.js

// Copyright 2013 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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var CheckStringReceiver = function() {
  "use strict";
  // Receivers of strict functions are not coerced.
  assertEquals("string", typeof this);
};

var CheckNumberReceiver = function() {
  "use strict";
  // Receivers of strict functions are not coerced.
  assertEquals("number", typeof this);
};

var CheckUndefinedReceiver = function() {
  "use strict";
  // Receivers of strict functions are not coerced.
  assertEquals("undefined", String(this));
};

var CheckNullReceiver = function() {
  "use strict";
  // Receivers of strict functions are not coerced.
  assertEquals("null", String(this));
};

var CheckCoersion = function() {
  // Receivers of non-strict functions are coerced to objects.
  assertEquals("object", typeof this);
};


function strict_mode() {
  "use strict";
  CheckStringReceiver.call("foo");
  CheckNumberReceiver.call(42);
  CheckUndefinedReceiver.call(undefined);
  CheckNullReceiver.call(null);
  [1].forEach(CheckStringReceiver, "foo");
  [2].every(CheckStringReceiver, "foo");
  [3].filter(CheckStringReceiver, "foo");
  [4].some(CheckNumberReceiver, 42);
  [5].map(CheckNumberReceiver, 42);

  CheckCoersion.call("foo");
  CheckCoersion.call(42);
  CheckCoersion.call(undefined);
  CheckCoersion.call(null);
  [1].forEach(CheckCoersion, "foo");
  [2].every(CheckCoersion, "foo");
  [3].filter(CheckCoersion, "foo");
  [4].some(CheckCoersion, 42);
  [5].map(CheckCoersion, 42);
};
strict_mode();

function sloppy_mode() {
  CheckStringReceiver.call("foo");
  CheckNumberReceiver.call(42);
  CheckUndefinedReceiver.call(undefined);
  CheckNullReceiver.call(null);
  [1].forEach(CheckStringReceiver, "foo");
  [2].every(CheckStringReceiver, "foo");
  [3].filter(CheckStringReceiver, "foo");
  [4].some(CheckNumberReceiver, 42);
  [5].map(CheckNumberReceiver, 42);

  CheckCoersion.call("foo");
  CheckCoersion.call(42);
  CheckCoersion.call(undefined);
  CheckCoersion.call(null);
  [1].forEach(CheckCoersion, "foo");
  [2].every(CheckCoersion, "foo");
  [3].filter(CheckCoersion, "foo");
  [4].some(CheckCoersion, 42);
  [5].map(CheckCoersion, 42);
};
sloppy_mode();