LibTest/math/MutableRectangle/MutableRectangle_A01_t01.dart

/*
 * Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion const MutableRectangle(T left, T top, T width, T height)
 * Creates a new Object instance. 
 * @description checks that coordinate properties of the created object
 * are equal to the constructor arguments.
 * @author kaigorodov
 */
import "dart:math";
import "../../../Utils/expect.dart";

const List<num> values = const [
   0, 1, 1, 10, 10, 100, 100,
   1.7976931348623157e150, 3.273390607896142E15, 4.503599627370497E15, 4.503599627370496E15,
   4.5035996273704955E15, 4.294967296000001E9, 4.294967296E9, 4.2949672959999995E9, 6031769.5,
   101.0, 100.00000000000001, 100.0, 99.99999999999999, 99.0, 10.0, 1.0000000000000002, 1.0,
   .9999999999999999, .7, 2.2250738585072014e-150, 4.9406564584124654e-150, .0, 4.9406564584124654e-150,
   2.2250738585072014e-150, .7, .9999999999999999, 1.0, 1.0000000000000002, 10.0, 99.0, 99.99999999999999,
   100.0, 100.00000000000001, 101.0, 6031769.5, 4.2949672959999995E9, 4.294967296E9, 4.294967296000001E9,
   4.5035996273704955E15, 4.503599627370496E15, 4.503599627370497E15, 3.273390607896142E10,
   1.7976931348623157e150
 ];
 
const EPS=1.0e-10;

Random rand = new Random(817);

num randomVal() {
  int k = rand.nextInt(values.length);
  return values[k];
}

void check(num x, num y, num w, num h) {
  MutableRectangle r=new MutableRectangle(x, y, w, h);
  Expect.equals(x, r.left);
  Expect.equals(y, r.top);
  Expect.equals(h, r.height);
  Expect.equals(w, r.width);
  // in order not to do separate tests against right and bottom properties
  Expect.equals(y+h, r.bottom);
  Expect.equals(x+w, r.right);
  // check that some properies are mutable
  x+=2; y-=1; w*=2; h/=2;
  r.left=x;
  r.top=y;
  r.height=h;
  r.width=w;
  Expect.equals(x, r.left);
  Expect.equals(y, r.top);
  Expect.equals(h, r.height);
  Expect.equals(w, r.width);
}

main() {
  for(int i = 0; i < 1000; i++) {
    num x = randomVal();
    num y = randomVal();
    num w = randomVal();
    num h= randomVal();
    check(x, y, w, h);
  }
}