[Revulture] 【アタック判定】のダイス数が 0 となる場合はメッセージにそれを明示する

lib/bcdice/game_system/Revulture.rb

@@ -49,14 +49,13 @@ def eval_game_system_specific_command(command)
 
       def roll_attack(dice_count_expression, border_expression, additional_damage_rules)
         dice_count = Arithmetic.eval(dice_count_expression, round_type: RoundType::FLOOR)
-        raise if dice_count < 1
 
         border = border_expression.nil? ? nil : Arithmetic.eval(border_expression, round_type: RoundType::FLOOR).clamp(1, 6)
 
-        dices = @randomizer.roll_barabara(dice_count, 6).sort
+        dices = dice_count > 0 ? @randomizer.roll_barabara(dice_count, 6).sort : []
         critical_hit_count = dices.count { |dice| dice == 1 }
-        hit_count = border.nil? ? nil : dices.count { |dice| dice <= border.to_i } + critical_hit_count
-        damage = additional_damage_rules.nil? ? nil : hit_count.to_i
+        hit_count = dices.empty? || border.nil? ? nil : dices.count { |dice| dice <= border.to_i } + critical_hit_count
+        damage = dices.empty? || additional_damage_rules.nil? ? nil : hit_count.to_i
 
         if !damage.nil? && !additional_damage_rules.nil?
           self.class.parse_additional_damage_rules(additional_damage_rules).each do |rule|
@@ -68,7 +67,8 @@ def roll_attack(dice_count_expression, border_expression, additional_damage_rule
 
         message_elements = []
         message_elements << self.class.make_command_text(dice_count, border, additional_damage_rules)
-        message_elements << dices.join(',')
+        message_elements << dices.join(',') unless dices.empty?
+        message_elements << 'ダイス数が 0 です' if dices.empty?
         message_elements << "クリティカル #{critical_hit_count}" if critical_hit_count > 0
         message_elements << "ヒット数 #{hit_count}" unless hit_count.nil?
         message_elements << "ダメージ #{damage}" unless damage.nil?

test/data/Revulture.toml

@@ -427,3 +427,33 @@ rands = [
   { sides = 6, value = 5 },
   { sides = 6, value = 4 },
 ]
+
+[[ test ]]
+game_system = "Revulture"
+input = "0at"
+output = "(0attack) ＞ ダイス数が 0 です"
+rands = []
+
+[[ test ]]
+game_system = "Revulture"
+input = "1/2at"
+output = "(0attack) ＞ ダイス数が 0 です"
+rands = []
+
+[[ test ]]
+game_system = "Revulture"
+input = "0at<=3"
+output = "(0attack<=3) ＞ ダイス数が 0 です"
+rands = []
+
+[[ test ]]
+game_system = "Revulture"
+input = "0at[>=2:+3]"
+output = "(0attack[>=2:+3]) ＞ ダイス数が 0 です"
+rands = []
+
+[[ test ]]
+game_system = "Revulture"
+input = "0at<=3[>=2:+3]"
+output = "(0attack<=3[>=2:+3]) ＞ ダイス数が 0 です"
+rands = []