linefeed-at-eof-in-unterminated-string-or-template.js

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/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

*/

//-----------------------------------------------------------------------------

var BUGNUMBER = 1476409;

var summary =

  "Properly handle the case of U+005C REVERSE SOLIDUS U+000D CARRIAGE RETURN " +

  "at the end of source text being tokenized, in the middle of a string or " +

  "template literal, where the next code point in memory (outside the bounds " +

  "of the source text) is U+000A LINE FEED";

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

function expectSyntaxError(code)

try

    eval(code);

    throw new Error("didn't throw");

  catch (e)

    assertEq(e instanceof SyntaxError, true,

             "got " + e.name + ", expected SyntaxError");

// The fundamental requirements of this test:

//

// 1. The computed string that is eval'd must be a Script that ends in a string

//    literal ending with the code points U+005C REVERSE SOLIDUS U+000D CARRIAGE

//    RETURN.

// 2. The *memory* that is actually tokenized/parsed by eval must be

//    immediately followed by U+000A LINE FEED.

//

// There's only one way to guarantee a U+000A LINE FEED after the source text:

// compute the source text as a dependent string,  of a larger (linear) string.

//  A simple substr will do the trick -- just as long as the substring can't fit

// in inline storage.  53 in the tests below comfortably exceeds all inline

// storage limits.

//

// One final wrinkle: because we only tokenize/parse two-byte source text right

// now, ensuring we directly tokenize/parse the dependent string's character

// data means the dependent string must have two-byte character data, hence the

// '\u1234' in the strings below.

function singleQuote()

  var containsBadSingleQuoteLiteral =

    "\u1234x'01234567890123456789012345678901234567890123456789\\\r\n0123456789";

  //        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  expectSyntaxError(containsBadSingleQuoteLiteral.substr(2, 53));

singleQuote();

function doubleQuote()

  var containsBadDoubleQuoteLiteral =

    "\u1234x\"01234567890123456789012345678901234567890123456789\\\r\n0123456789";

  //        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  expectSyntaxError(containsBadDoubleQuoteLiteral.substr(2, 53));

doubleQuote();

function template()

  var containsBadTemplateLiteral =

    "\u1234x`01234567890123456789012345678901234567890123456789\\\r\n0123456789";

  //        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  expectSyntaxError(containsBadTemplateLiteral.substr(2, 53));

template();

/******************************************************************************/

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("Tests complete");