module TestArray

  use int.Int
  use array.Array

  let test_append () =
    let a1 = make 17 2 in
    assert { a1[3] = 2 };
    a1[3] <- 4;
    assert { a1[3] = 4 };
    let a2 = make 25 3 in
    assert { a2[0] = 3 }; (* needed to prove a[17]=3 below *)
    let a  = append a1 a2 in
    assert { length a = 42 };
    assert { a[3] = 4 };
    assert { a[17] = 3 };
    ()

  let test_fill () =
    let a = make 17 True in
    fill a 10 4 False;
    assert { a[9] = True };
    assert { a[10] = False };
    assert { a[14] = True }

  let test_blit () =
    let a1 = make 17 True in
    let a2 = make 25 False in
    blit a1 10 a2 17 7;
    assert { a1[10] = True  };
    assert { a2[16] = False };
    assert { a2[17] = True  };
    assert { a2[23] = True  };
    assert { a2[24] = False }

end