PenroseSize { public static double distance(double[] v1, double[] v2){ Asserts.assertEqualLength(v1, v2); int n = v1.length; double sum = 0; for(int i=0;i<n;i++){ sum += Math.abs(v1[i]-v2[i]); } return sum*Math.sqrt(n); }  static double distance(double[] v1, double[] v2);  }
@Test public void test1(){ double[] v1 = new double[]{8,3,7}; double[] v2 = new double[]{9,8,4}; Asserts.assertEqualLength(v1, v2); double res = PenroseSize.distance(v1, v2); Asserts.assertEquals(res, 15.5884572681199); }
@Test public void test2(){ double[] v1 = new double[]{8,-32,7,0,-45}; double[] v2 = new double[]{97,-78,41,-4,-78}; Asserts.assertEqualLength(v1, v2); double res = PenroseSize.distance(v1, v2); Asserts.assertEquals(res, 460.63000336495668); }
@Test public void test3(){ double[] v1 = new double[]{248.124,-321.574,788.14,0.001,-459.298}; double[] v2 = new double[]{97.145,-78.658,417.0004,-4.02,-7865.3594}; Asserts.assertEqualLength(v1, v2); double res = PenroseSize.distance(v1, v2); Asserts.assertEquals(res, 18280.11733601414824); }