/**
  * Test id conversions from user+choicids to graphids
  */
 public function test_setupids()
 {
     $ratings = array();
     $ratings[1] = new stdClass();
     $ratings[1]->userid = 3;
     $ratings[1]->choiceid = 1;
     $ratings[1]->rating = 5;
     $ratings[2] = new stdClass();
     $ratings[2]->userid = 3;
     $ratings[2]->choiceid = 2;
     $ratings[2]->rating = 3;
     $ratings[3] = new stdClass();
     $ratings[3]->userid = 2;
     $ratings[3]->choiceid = 1;
     $ratings[3]->rating = 5;
     $ratings[4] = new stdClass();
     $ratings[4]->userid = 2;
     $ratings[4]->choiceid = 2;
     $ratings[4]->rating = 2;
     $usercount = 2;
     list($fromuserid, $touserid, $fromchoiceid, $tochoiceid) = solver_edmonds_karp::setup_id_conversions($usercount, $ratings);
     $this->assertEquals(array(3 => 1, 2 => 2), $fromuserid);
     $this->assertEquals(array(1 => 3, 2 => 2), $touserid);
     $this->assertEquals(array(1 => 3, 2 => 4), $fromchoiceid);
     $this->assertEquals(array(3 => 1, 4 => 2), $tochoiceid);
 }