CSE2410 Fall 2014 Bounce

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// Test that we can make large object literals that work.

// Also test that we can attempt to make even larger object literals without

// crashing.

function testLiteral(size, array_in_middle) {

  print(size);

  var f;

  // Build object-literal string.

  var literal = "function f() { return ";

  for (var i = 0; i < size; i++) {

    literal += "[";

  }

  literal += array_in_middle ? " [42.2]" : "{a:42.2}";

  for (var i = 0; i < size; i++) {

    literal += "]";

  }

  literal += "; }";

  // Create the object literal.

  eval(literal);

  var x = f();

  // Check that the properties have the expected values.

  for (var i = 0; i < size; i++) {

    x = x[0];

  }

  if (array_in_middle) {

    assertEquals(42.2, x[0]), "x array in middle";

    x[0] = 41.2;

  } else {

    assertEquals(42.2, x.a, "x object in middle");

    x.a = 41.2;

  }

  var y = f();

  for (var i = 0; i < size; i++) {

    y = y[0];

  }

  if (array_in_middle) {

    assertEquals(42.2, y[0], "y array in middle");

    y[0] = 41.2;

  } else {

    assertEquals(42.2, y.a, "y object in middle");

    y.a = 41.2;

  }

}

// The sizes to test.

var sizes = [1, 2, 100, 200, 400];

// Run the test.

for (var i = 0; i < sizes.length; i++) {

  testLiteral(sizes[i], false);

  testLiteral(sizes[i], true);

}

function testLiteralAndCatch(size) {

  var big_enough = false;

  try {

    testLiteral(size, false);

  } catch (e) {

    big_enough = true;

  }

  try {

    testLiteral(size, true);

  } catch (e) {

    big_enough = true;

  }

  return big_enough;

}

// Catch stack overflows.

testLiteralAndCatch(1000) ||

testLiteralAndCatch(20000) ||

testLiteralAndCatch(200000);