#include "stdafx.h"
#include "test.h"
#include "mdc.h"
#include "mdc_algorithms.h"

using namespace mdc;

BEGIN_TEST_DATA_CLASS(canvas_algorithms)
END_TEST_DATA_CLASS


TEST_MODULE(canvas_algorithms, "Canvas: algorithms");


// line intersection
TEST_FUNCTION(1)
{
  Point p;
  bool flag;
  
  //
  // -------
  //    
  //    |
  //    |
  //
  flag= intersect_lines(Point(0, 0), Point(50, 0),
                        Point(25, 25), Point(25, 100),
                        p);
  ensure("line intersection1", !flag); 
  
  
  //
  //    |
  // -------
  //    |
  //
  flag= intersect_lines(Point(0, 25), Point(50, 25),
                        Point(25, 0), Point(25, 50),
                        p);
  ensure("line intersection2", flag); 
  ensure_equals("line intersection2 x", p.x, 25); 
  ensure_equals("line intersection2 y", p.y, 25); 
}


TEST_FUNCTION(2) // rect intersection with line
{
  Rect rect(Point(0, 0), Size(50, 50));
  Point p1, p2;
  bool flag;

  flag= intersect_rect_to_line(rect, Point(25,25), Point(25,100), p1, p2);
  ensure("intersection of rect to line from center", flag);

  ensure("intersection of rect to line from center should be 1 pt", p1==p2);

  ensure_equals("intersection of rect to line from center x", p1.x, 25);
  ensure_equals("intersection of rect to line from center y", p1.y, 50);
}



END_TESTS
