Unit test cases for private method

 

@Test
@DisplayName("player should get game trophy if he/she meet game trophy criteria")
void testCalculateGameTrophy() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
    TrophyCalculationServiceImpl trophyCalculationService = new TrophyCalculationServiceImpl(trophyCalculationDao, oneHuddleMilestoneService);
    Method calculateGameTrophyMethod = TrophyCalculationServiceImpl.class.getDeclaredMethod("hasGameTrophyAchievedByPlayer", PlayerReport.class, GameTrophy.class);
    calculateGameTrophyMethod.setAccessible(true);
    PlayerReport playerReport = PlayerReport.builder().playerId(1).attempt(10).build();
    GameTrophy gameTrophy = GameTrophy.builder().gameTrophiesId(1).gameId(1).attempts(9).build();
    assertTrue((boolean) calculateGameTrophyMethod.invoke(trophyCalculationService, playerReport, gameTrophy));
}