testPointHashFunctions.cpp

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#include <iostream>
#include "DGtal/base/Common.h"
#include "ConfigTest.h"
#include "DGtal/helpers/StdDefs.h"
 
#include "DGtalCatch.h"
 
#include "DGtal/kernel/PointVector.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/kernel/PointHashFunctions.h"
 
using namespace std;
using namespace DGtal;
 
 
 
TEST_CASE("Hash functions on DGtal::Point")
{
  Z3i::Point p(0,0,0);
  Z3i::Point q(10,0,0);
  Z3i::Point p_copy(0,0,0);
  std::hash<Z3i::Point> myhashcpp11;
  
  SECTION("Identity test")
    {
      REQUIRE( myhashcpp11(p) == myhashcpp11(p_copy) );
    }
 
  
  SECTION("Difference test")
    {
      REQUIRE( myhashcpp11(p) != myhashcpp11(q) );
    }
    
  SECTION("Higher dimension identity test")
    {
      typedef PointVector<26,int> Point26;
      Point26 pp=Point26::diagonal(12),
        qq=(Point26::diagonal(11) + Point26::diagonal(1)),
        rr=Point26::diagonal(13);
 
      std::hash<Point26> myhash26cpp11;
      
      REQUIRE( myhash26cpp11(pp) == myhash26cpp11(qq) );
      REQUIRE( myhash26cpp11(pp) != myhash26cpp11(rr) );
    }
}