MODULE test_rect ;

(* m2SDL3 unit test: pure-Modula-2 SDL3Rect helpers, no SDL needed. *)

FROM SDL3Rect IMPORT SDLRect, SDLFRect,
   MakePoint, MakeFPoint, MakeRect, MakeFRect,
   PointEquals, FPointEquals, RectEquals, FRectEquals,
   RectEmpty, FRectEmpty;
FROM libc IMPORT printf;

VAR r: SDLRect; fr: SDLFRect;

BEGIN
   IF NOT PointEquals(MakePoint(1, 2), MakePoint(1, 2)) THEN
      printf("FAIL test_rect: PointEquals\n"); HALT(1) END;
   IF PointEquals(MakePoint(1, 2), MakePoint(3, 4)) THEN
      printf("FAIL test_rect: PointEquals negative\n"); HALT(1) END;
   IF NOT RectEquals(MakeRect(0, 0, 10, 20), MakeRect(0, 0, 10, 20)) THEN
      printf("FAIL test_rect: RectEquals\n"); HALT(1) END;
   r := MakeRect(0, 0, 10, 20);
   IF RectEmpty(r) THEN
      printf("FAIL test_rect: RectEmpty false positive\n"); HALT(1) END;
   r := MakeRect(0, 0, 0, 20);
   IF NOT RectEmpty(r) THEN
      printf("FAIL test_rect: RectEmpty zero width\n"); HALT(1) END;
   IF NOT FPointEquals(MakeFPoint(VAL(SHORTREAL, 1.5), VAL(SHORTREAL, 2.5)),
                        MakeFPoint(VAL(SHORTREAL, 1.5), VAL(SHORTREAL, 2.5))) THEN
      printf("FAIL test_rect: FPointEquals\n"); HALT(1) END;
   IF NOT FRectEquals(MakeFRect(VAL(SHORTREAL, 0.0), VAL(SHORTREAL, 0.0),
                                VAL(SHORTREAL, 10.0), VAL(SHORTREAL, 20.0)),
                       MakeFRect(VAL(SHORTREAL, 0.0), VAL(SHORTREAL, 0.0),
                                VAL(SHORTREAL, 10.0), VAL(SHORTREAL, 20.0))) THEN
      printf("FAIL test_rect: FRectEquals\n"); HALT(1) END;
   fr := MakeFRect(VAL(SHORTREAL, 0.0), VAL(SHORTREAL, 0.0),
                   VAL(SHORTREAL, 0.0), VAL(SHORTREAL, 5.0));
   IF NOT FRectEmpty(fr) THEN
      printf("FAIL test_rect: FRectEmpty zero width\n"); HALT(1) END;
   printf("PASS test_rect\n")
END test_rect.