auto x = [1, 2, 3]
x.insert_at(1, 6)
assert_equal([1,6,2,3], x);

try {
  // We expect this to throw because of inserting an out of bounds index
  x.insert_at(5, 55)
  assert_true(false)
} catch (e) {
  assert_true(true)
}

// Inserting to the end should be allowed
x.insert_at(4, 44)

try {
  // We expect this to throw because of inserting an out of bounds index
  x.insert_at(-1, 111)
  assert_true(false)
} catch (e) {
  assert_true(true)
}

x.insert_at(0, 100)
assert_equal([100, 1, 6, 2, 3, 44], x)