source: class CalculatorTest {
  
      private static final int RANK_NO;
      private static final int USER_RATE_FACTOR;
      private static final int ACTUAL_RATE;
      private static final long OBF_RATE;
  
      @Test
      @DisplayName("順位のズレによりユーザー別戦果係数の導出に失敗する")
      public void detectUserRateFactorFailBadRankNo() {
  
target:         int factor = Calculator.detectUserRateFactor(RANK_NO + 1, OBF_RATE, ACTUAL_RATE);
          assertEquals(0, factor);
      }
  
  }