test/mjsunit/closures.js

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function runner(f, expected) {
  for (var i = 0; i < 1000000; i++) {
    assertEquals(expected, f.call(this));
  }
}

function test(n) {
  function MyFunction() {
    var result = n * 2 + arguments.length;
    return result;
  }
  runner(MyFunction, n * 2);
}

test(1);
test(42);
test(239);