open OUnit2
module N = DataType.Num

let test_num_add n1 n2 result ctx = begin
  assert_equal
    ~cmp:(=)
    result
    (N.to_int @@ N.add n1 n2)
end

let test_num_mult n1 n2 result ctx = begin
  assert_equal
    ~cmp:(=)
    result
    (N.to_int @@ N.mult n1 n2)
end

let test_num_sub n1 n2 result ctx = begin
  assert_equal
    ~cmp:(=)
    result
    (N.to_int @@ N.sub n1 n2)
end

let test_floor n1 expected ctx = begin

  let result = N.to_int @@ N.floor n1 in

  assert_equal
    ~msg:(Printf.sprintf "Expected %d but got %d" expected result)
    ~cmp:(=)
    expected
    result

end

let test_round_down n1 expected ctx = begin

  let result = N.to_int @@ N.round_down n1 in

  assert_equal
    ~msg:(Printf.sprintf "Expected %d but got %d" expected result)
    ~cmp:(=)
    expected
    result

end



let n1 = N.of_int 1
let n2 = N.of_int 2

let num_tests = "num_test">::: [

    "test_add"        >:: test_num_add n1     n1    2;
    "test_mult"       >:: test_num_mult n2    n1    2;
    "test_sub"        >:: test_num_sub n1     n1    0;
    "test_floor1"     >:: test_floor (N.of_float   1.2)    1;
    "test_floor2"     >:: test_floor (N.of_float (-1.2)) (-2);
    "test_floor3"     >:: test_floor (N.of_float   1.8)    1;
    "test_floor4"     >:: test_floor (N.of_float (-1.8)) (-2);
    "test_round_down1" >:: test_round_down (N.of_float   1.2)    1;
    "test_round_down2" >:: test_round_down (N.of_float (-1.2)) (-1);
    "test_round_down3" >:: test_round_down (N.of_float   1.8)    1;
    "test_round_down4" >:: test_round_down (N.of_float (-1.8)) (-1);
 ]