refactor: increase reusability of random number maker

src/constant/Constants.js

@@ -15,9 +15,13 @@ const CAR_NAME_LENGTH = Object.freeze({
   MAXIMUM_CAR_NAME_LENGTH: 5,
 });
 
+const RANDOM_NUMBER_RANGE = Object.freeze({
+  MIN: 0,
+  MAX: 9,
+});
+
 const MINIMUM_TRY_COUNT = 1;
 const MINIMUM_NUMBER_OF_CARS = 2;
-const LESS_THAN_TEN = 10;
 
 const ERROR_MESSAGE = Object.freeze({
   NAME_LENGTH_LIMIT: `자동차 이름은 ${CAR_NAME_LENGTH.MINIMUM_CAR_NAME_LENGTH}글자 이상, ${CAR_NAME_LENGTH.MAXIMUM_CAR_NAME_LENGTH}글자 이하로 입력해 주세요.`,
@@ -44,9 +48,9 @@ module.exports = {
   LINE_BREAK,
   GAME_MESSAGE,
   CAR_NAME_LENGTH,
+  RANDOM_NUMBER_RANGE,
   MINIMUM_TRY_COUNT,
   MINIMUM_NUMBER_OF_CARS,
-  LESS_THAN_TEN,
   ERROR_MESSAGE,
   REGEX,
   MOVEMENT,

src/domain/CarGame.js

@@ -1,6 +1,7 @@
 const { movingDistance } = require("./MovementIndicator");
-const makeRandomNumber = require("../util/RandomNumberMaker");
-const { COMMA } = require("../constant/Constants");
+const randomNumberBetween = require("../util/RandomNumberMaker");
+const { COMMA, RANDOM_NUMBER_RANGE } = require("../constant/Constants");
+const { MIN, MAX } = RANDOM_NUMBER_RANGE;
 
 class CarGame {
   #carStatus = new Map([]);
@@ -11,7 +12,10 @@ class CarGame {
 
   moveCar() {
     [...this.#carStatus.entries()].forEach(([name, count]) => {
-      this.#carStatus.set(name, count + movingDistance(makeRandomNumber()));
+      this.#carStatus.set(
+        name,
+        count + movingDistance(randomNumberBetween(MIN, MAX))
+      );
     });
 
     return this.#carStatus;

src/util/RandomNumberMaker.js

@@ -1,7 +1,5 @@
-const { LESS_THAN_TEN } = require("../constant/Constants");
-
-const makeRandomNumber = () => {
-  return Math.floor(Math.random() * LESS_THAN_TEN); // 0 ~ 9 사이의 정수
+const randomNumberBetween = (min, max) => {
+  return Math.floor(Math.random() * (max - min + 1) + min);
 };
 
-module.exports = makeRandomNumber;
+module.exports = randomNumberBetween;