public void testConcurrentUpgrade() {
boolean selection = FreeColTestUtils.setStudentSelection(false);
Game game = ServerTestHelper.startServerGame(getTestMap(true));
Colony colony = getSchoolColony(2, SchoolLevel.SCHOOLHOUSE);
Building school = colony.getBuilding(schoolType);
Iterator<Unit> units = colony.getUnitIterator();
Unit lumber = units.next();
lumber.setType(expertLumberJackType);
Unit student = units.next();
student.setType(pettyCriminalType);
student.setLocation(colony.getBuilding(townHallType));
assertTrue(school.canTeach());
assertTrue(colony.canTrain(lumber));
lumber.setLocation(school);
ServerTestHelper.newTurn();
assertEquals(student, lumber.getStudent());
// lumber jack can teach indentured servant
student.changeType(indenturedServantType);
assertEquals(student, lumber.getStudent());
// lumber jack can teach free colonist
student.changeType(freeColonistType);
assertEquals(student, lumber.getStudent());
// lumber jack can not teach expert
student.changeType(masterCarpenterType);
assertNull(lumber.getStudent());
assertNull(student.getTeacher());
FreeColTestUtils.setStudentSelection(selection);
}
