[둘리] 2단계 자동차 경주 제출합니다.

src/main/kotlin/controller/RaceGame.kt

@@ -1,63 +1,49 @@
 package controller
+
+import generator.RandomGenerator
 import model.Cars
-import util.CarsHelper
-import util.Validator
+import util.Constants
+import util.WinnersFinder
 import view.InputView
 import view.OutputView
 
 class RaceGame(private val outputView: OutputView, private val inputView: InputView) {
 
  fun run() {
- val cars = executeInputCarNames()
- val tryNumber = executeInputTryNumber()
+ outputView.outputCarNames()
+ val cars = Cars(inputCarNames())
+ outputView.outputTryNumber()
+ val tryNumber = inputTryNumber().toInt()
  outputView.outputResults()
  repeat(tryNumber) {
  tryMove(cars)
  }
- outputView.outputWinners(CarsHelper.findWinners(cars))
+ outputView.outputWinners(WinnersFinder.findWinners(cars))
  }
 
  private fun tryMove(cars: Cars) {
  repeat(cars.getCarSize()) {
- cars.move(it)
- outputView.outputResult(cars.getCarInfo(it))
+ cars.move(it, RandomGenerator().getRandomNumber())
+ outputView.outputResult(cars.getCar(it))
  }
  outputView.outputNextLine()
  }
 
- private fun executeInputTryNumber(): Int {
- var result: Int?
- do {
- outputView.outputTryNumber()
- result = getInputTryNumber(inputView.inputTryNumber())
- } while (result == null)
- return result
- }
-
- private fun getInputTryNumber(number: String): Int? {
- return runCatching {
- Validator().checkTryNumber(number)
- number.toInt()
- }.onFailure {
- outputView.outputErrorMessage(it.message ?: "에러가 발생했습니다.")
- }.getOrNull()
- }
-
- private fun executeInputCarNames(): Cars {
- var result: Cars?
- do {
- outputView.outputCarNames()
- result = getInputCarNames(inputView.inputCarNames())
- } while (result == null)
- return result
+ private fun inputCarNames(): String {
+ var input = inputView.inputCarNames()
+ while (input.isNullOrBlank() || input.contains("[ERROR]")) {
+ outputView.outputErrorMessage(input ?: Constants.INPUT_IS_NULL)
+ input = inputView.inputCarNames()
+ }
+ return input
  }
 
- private fun getInputCarNames(cars: String): Cars? {
- return runCatching {
-  Validator().checkNames(cars)
- Cars(cars)
- }.onFailure {
-  outputView.outputErrorMessage(it.message ?: "에러가 발생했습니다.")
- }.getOrNull()
+ private fun inputTryNumber(): String {
+ var input = inputView.inputTryNumber()
+ while (input.isNullOrBlank() || input.contains("[ERROR]")) {
+ outputView.outputErrorMessage(input ?: Constants.INPUT_IS_NULL)
+  input = inputView.inputTryNumber()
+ }
+ return input
  }
 }

src/main/kotlin/model/Car.kt

@@ -2,16 +2,17 @@ package model
 
 import util.Validator
 
-class Car(private val name: String, private var position: Int = 0) {
+class Car(val name: String, position: Int = 0) {
+
+ private var _position: Int = position
+ val position: Int get() = _position
 
  init {
  Validator().checkName(name)
  }
 
- fun getInfo(): CarInfo = CarInfo(name, position)
-
  fun move(condition: Int) {
- if (condition >= MOVING_POINT) position++
+ if (condition >= MOVING_POINT) _position++
  }
 
  companion object {

src/main/kotlin/model/Cars.kt

@@ -1,21 +1,14 @@
 package model
 
-import generator.RandomGenerator
+class Cars(cars: List<Car>) {
+ private val _cars: List<Car> = cars
+ val cars: List<Car> get() = _cars
 
-class Cars(private val cars: List<Car>) {
  constructor(input: String) : this(input.split(",").mapIndexed { _, name -> Car(name.trim()) })
 
- fun getCarInfos(): List<CarInfo> {
- val carInfos = mutableListOf<CarInfo>()
- repeat(cars.size) {
- carInfos.add(cars[it].getInfo())
- }
- return carInfos
- }
-
- fun getCarInfo(index: Int): CarInfo = cars[index].getInfo()
- fun getCarSize(): Int = cars.size
- fun move(index: Int) {
- cars[index].move(RandomGenerator().getRandomNumber())
+ fun getCar(index: Int): Car = _cars[index]
+ fun getCarSize(): Int = _cars.size
+ fun move(index: Int, condition: Int) {
+ _cars[index].move(condition)
  }
 }

src/main/kotlin/util/Constants.kt

@@ -5,9 +5,10 @@ object Constants {
  const val INPUT_TRY_NUMBER = "시도할 횟수는 몇 회인가요?"
  const val OUTPUT_RESULT = "실행 결과"
  const val OUTPUT_WINNER = "최종 우승자: "
- const val INPUT_NAME_SIZE_ERROR_MESSAGE = "자동차 이름의 길이가 5를 초괴합니다."
- const val INPUT_NAME_NULL_ERROR_MESSAGE = "자동차 이름이 입력되지 않았습니다."
- const val INPUT_TRY_NUMBER_NULL_ERROR_MESSAGE = "시도할 횟수가 입력되지 않았습니다."
- const val INPUT_TRY_NUMBER_RIGHT_ERROR_MESSAGE = "시도할 횟수가 올바르게 입력되지 않았습니다."
- const val INPUT_NAME_RIGHT_ERROR_MESSAGE = "자동차 이름은 한글과 영어만 가능합니다."
+ const val INPUT_NAME_SIZE_ERROR_MESSAGE = "[ERROR] 자동차 이름의 길이가 5를 초괴합니다."
+ const val INPUT_NAME_NULL_ERROR_MESSAGE = "[ERROR] 자동차 이름이 입력되지 않았습니다."
+ const val INPUT_TRY_NUMBER_NULL_ERROR_MESSAGE = "[ERROR] 시도할 횟수가 입력되지 않았습니다."
+ const val INPUT_TRY_NUMBER_RIGHT_ERROR_MESSAGE = "[ERROR] 시도할 횟수가 올바르게 입력되지 않았습니다."
+ const val INPUT_NAME_RIGHT_ERROR_MESSAGE = "[ERROR] 자동차 이름은 한글과 영어만 가능합니다."
+ const val INPUT_IS_NULL = "[ERROR] 입력 값이 널입니다."
 }

src/main/kotlin/util/Validator.kt

@@ -18,7 +18,7 @@ class Validator {
 
  fun checkTryNumber(name: String?) {
  checkTryNumberNull(name)
- checkTryNumberIsRight(name)
+ checkTryNumberIsRight(name ?: "")
  }
 
  private fun checkNameNull(name: String?) {
@@ -41,11 +41,7 @@ class Validator {
  require(number != null) { Constants.INPUT_TRY_NUMBER_NULL_ERROR_MESSAGE }
  }
 
- private fun checkTryNumberIsRight(number: String?) {
- try {
- number!!.toInt()
- } catch (e: NumberFormatException) {
- throw IllegalArgumentException(Constants.INPUT_TRY_NUMBER_RIGHT_ERROR_MESSAGE)
- }
+ private fun checkTryNumberIsRight(number: String) {
+ require(number.isNotEmpty() && number.chars().allMatch { Character.isDigit(it) }) { Constants.INPUT_TRY_NUMBER_RIGHT_ERROR_MESSAGE }
  }
 }

src/main/kotlin/util/WinnersFinder.kt

@@ -0,0 +1,10 @@
+package util
+
+import model.Cars
+
+object WinnersFinder {
+ fun findWinners(cars: Cars): List<String> {
+ val equalCars = cars.cars.groupBy({ it.position }, { it.name })
+ return equalCars[equalCars.keys.max()]?.toList() ?: emptyList()
+ }
+}

src/main/kotlin/view/InputView.kt

@@ -1,11 +1,25 @@
 package view
 
+import util.Validator
+
 class InputView {
- fun inputCarNames(): String {
- return readLine() ?: ""
+ fun inputCarNames(): String? {
+ var input = readlnOrNull()
+ runCatching {
+ Validator().checkNames(input)
+ }.onFailure {
+ input = it.message
+ }
+ return input
  }
 
- fun inputTryNumber(): String {
- return readLine() ?: ""
+ fun inputTryNumber(): String? {
+ var input = readlnOrNull()
+ runCatching {
+ Validator().checkTryNumber(input)
+ }.onFailure {
+ input = it.message
+ }
+ return input
  }
 }

src/main/kotlin/view/OutputView.kt

@@ -1,6 +1,6 @@
 package view
 
-import model.CarInfo
+import model.Car
 import util.Constants
 
 class OutputView {
@@ -26,9 +26,9 @@ class OutputView {
  println(error)
  }
 
- fun outputResult(info: CarInfo) {
- print(info.name + " : ")
- repeat(info.position) {
+ fun outputResult(car: Car) {
+ print(car.name + " : ")
+ repeat(car.position) {
  print("-")
  }
  println()

src/test/kotlin/CarTest.kt

@@ -6,10 +6,10 @@ import org.junit.jupiter.api.assertThrows
 class CarTest {
 
  @Test
- fun getInfoTest() {
+ fun checkCarCreateTest() {
  val car = Car("dool")
- assertThat(car.getInfo().name).isEqualTo("dool")
- assertThat(car.getInfo().position).isEqualTo(0)
+ assertThat(car.name).isEqualTo("dool")
+ assertThat(car.position).isEqualTo(0)
  }
 
  @Test
@@ -23,13 +23,13 @@ class CarTest {
  fun moveTest() {
  val car = Car("dool")
  car.move(3)
- assertThat(car.getInfo().position).isEqualTo(0)
+ assertThat(car.position).isEqualTo(0)
  }
 
  @Test
  fun dontMoveTest() {
  val car = Car("dool")
  car.move(4)
- assertThat(car.getInfo().position).isEqualTo(1)
+ assertThat(car.position).isEqualTo(1)
  }
 }

src/test/kotlin/CarsTest.kt

@@ -9,7 +9,7 @@ class CarsTest {
  fun mappingCarsTest() {
  val carNames = listOf("pobi", "dool", "woni")
  repeat(cars.getCarSize()) {
- assertThat(cars.getCarInfo(it).name).isEqualTo(carNames[it])
+ assertThat(cars.getCar(it).name).isEqualTo(carNames[it])
  }
  }