Yep, you could change the asserted length and it would succeed:

  assert_eq!(array, [0, 1, 2]);

If you tried both—

  assert_eq!(array, [0, 1, 2]);
  assert_eq!(array, [0, 1, 2, 3, 4]);

—the assertions would never run because it wouldn’t even compile:

  error[E0277]: can't compare `[usize; 3]` with `[{integer}; 5]`