src/third_party/mozjs-45/js/src/jit-test/tests/parser/columnNumber.js

// Simple tests for evaluate's "columnNumber" option.

load(libdir + 'asserts.js');

assertEq(evaluate("saveStack().column"), 1);
assertEq(evaluate("saveStack().column", { columnNumber: 1729 }), 1730);
assertEq(evaluate("\nsaveStack().column", { columnNumber: 1729 }), 1);
assertEq(evaluate("saveStack().column", { columnNumber: "42" }), 43);
assertThrowsInstanceOf(() => evaluate("saveStack().column", { columnNumber: -10 }),
                       RangeError);
assertThrowsInstanceOf(() => evaluate("saveStack().column", { columnNumber: Math.pow(2,30) }),
                       RangeError);

if (helperThreadCount() > 0) {
  print("offThreadCompileScript 1");
  offThreadCompileScript("saveStack().column", { columnNumber: -10 });
  assertThrowsInstanceOf(runOffThreadScript, RangeError);

  print("offThreadCompileScript 2");
  offThreadCompileScript("saveStack().column", { columnNumber: Math.pow(2,30) });
  assertThrowsInstanceOf(runOffThreadScript, RangeError);

  print("offThreadCompileScript 3");
  offThreadCompileScript("saveStack().column", { columnNumber: 10000 });
  assertEq(runOffThreadScript(), 10001);
}

// Check handling of columns near the limit of our ability to represent them.
// (This is hardly thorough, but since web content can't set column numbers,
// it's probably not worth it to be thorough.)
const maxColumn = Math.pow(2, 30) - 1;
assertEq(evaluate("saveStack().column", { columnNumber: maxColumn }),
         maxColumn + 1);

// Check the 'silently zero' behavior when we reach the limit of the srcnotes
// column encoding.
assertEq(evaluate(" saveStack().column", { columnNumber: maxColumn }),
         1);

// Gathering source text for inclusion in error messages should not try to reach
// outside the buffer to find the start of the source line. The below should
// report the error without crashing.
assertThrowsInstanceOf(() => evaluate("function x(y,y) { 'use strict'; } x()",
                                      { columnNumber: 10 }),
                       SyntaxError);