Step3 racing

src/main/java/SetCollection.java

@@ -0,0 +1,8 @@
+import java.util.Set;
+
+public class SetCollection {
+    public Integer getNumbersSize(Set<Integer> numbers) {
+        return numbers.size();
+    }
+
+}

src/main/java/StringPs.java

@@ -0,0 +1,15 @@
+public class StringPs {
+
+    public String[] stringSplit(String s) {
+        String[] arr = s.split(",");
+        return arr;
+    }
+
+    public String stringSub(String s) {
+        return s.substring(1,4);
+    }
+
+    public String stringCharAt(int i, String abc) {
+        return Character.toString(abc.charAt(i));
+    }
+}

src/main/java/calculator/Calculator.java

@@ -0,0 +1,89 @@
+package calculator;
+
+import java.lang.reflect.Array;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import static java.lang.Integer.parseInt;
+
+public class Calculator {
+
+    public int getNumber(String s) {
+        String[] arr = s.split(" ");
+        ArrayList<String> arrayList = new ArrayList<>(Arrays.asList(arr));
+        if(arrayList.size() == 1) {
+            return  Integer.parseInt(arrayList.get(0));
+        }
+        while (arrayList.size() > 0) {
+
+            if(arrayList.get(1).equals("+")) {
+               int number = addNumber(arrayList.get(0), arrayList.get(2));
+
+               for(int i =0; i<3; i++ ) {
+                   arrayList.remove(0);
+               }
+                arrayList.add(0,Integer.toString(number));
+            }
+
+            if(arrayList.size()==1){
+                return Integer.parseInt(arrayList.get(0));
+            }
+
+            if(arrayList.get(1).equals("-")) {
+                int number = subTractionNumber(arrayList.get(0), arrayList.get(2));
+
+                for(int i =0; i<3; i++ ) {
+                    arrayList.remove(0);
+                }
+                arrayList.add(0,Integer.toString(number));
+            }
+
+            if(arrayList.size()==1){
+                return Integer.parseInt(arrayList.get(0));
+            }
+
+            if(arrayList.get(1).equals("*")) {
+                int number = multiplicationNumber(arrayList.get(0), arrayList.get(2));
+
+                for(int i =0; i<3; i++ ) {
+                    arrayList.remove(0);
+                }
+                arrayList.add(0,Integer.toString(number));
+            }
+
+            if(arrayList.size()==1){
+                return Integer.parseInt(arrayList.get(0));
+            }
+
+            if(arrayList.get(1).equals("/")) {
+                int number = divideNumber(arrayList.get(0), arrayList.get(2));
+
+                for(int i =0; i<3; i++ ) {
+                    arrayList.remove(0);
+                }
+                arrayList.add(0,Integer.toString(number));
+            }
+
+            if(arrayList.size()==1){
+                return Integer.parseInt(arrayList.get(0));
+            }
+        }
+        return Integer.parseInt(arrayList.get(0));
+    }
+
+    public int addNumber(String s, String b) {
+        return Integer.parseInt(s) + Integer.parseInt(b);
+    }
+
+    public int subTractionNumber(String s, String b) {
+        return Integer.parseInt(s) - Integer.parseInt(b);
+    }
+
+    public int divideNumber(String s, String b) {
+        return Integer.parseInt(s) / Integer.parseInt(b);
+    }
+
+    public int multiplicationNumber(String s, String b) {
+        return Integer.parseInt(s) * Integer.parseInt(b);
+    }
+}

src/main/java/calculator/Computation.java

@@ -0,0 +1,20 @@
+package calculator;
+
+public class Computation {
+
+    public int addNumber(String s, String b) {
+        return Integer.parseInt(s) + Integer.parseInt(b);
+    }
+
+    public int subTractionNumber(String s, String b) {
+        return Integer.parseInt(s) - Integer.parseInt(b);
+    }
+
+    public int divideNumber(String s, String b) {
+        return Integer.parseInt(s) / Integer.parseInt(b);
+    }
+
+    public int multiplicationNumber(String s, String b) {
+        return Integer.parseInt(s) * Integer.parseInt(b);
+    }
+}

src/main/java/racing/InputView.java

@@ -0,0 +1,20 @@
+package racing;
+
+import java.util.Scanner;
+
+public class InputView {
+
+    Scanner scanner = new Scanner(System.in);
+
+    public int askCarCount() {
+        System.out.printf("자동차 대수는 몇 대 인가요?");
+        int carCount = scanner.nextInt();
+        return carCount;
+    }
+
+    public int askMoveCount() {
+        System.out.printf("시도할 회수는 몇 회 인가요?");
+        int moveCount = scanner.nextInt();
+        return moveCount;
+    }
+}

src/main/java/racing/README.md

@@ -0,0 +1,6 @@
+ 1. 초간단 자동차 경주 게임을 구현한다.
+ 2. 주어진 횟수 동안 n대의 자동차는 전진 또는 멈출 수 있다.
+ 3. 사용자는 몇 대의 자동차로 몇 번의 이동을 할 것인지를 입력할 수 있어야 한다.
+ 4. 전진하는 조건은 0에서 9 사이에서 random 값을 구한후 random 값이 4 이상일 경우이다.
+ 자동차의 상태를 화면에 출력한다. 어느 시점에 출력할 것인지를 대한 제약은 없다.
+

src/main/java/racing/RacingCar.java

@@ -0,0 +1,20 @@
+package racing;
+
+import java.util.Random;
+
+public class RacingCar {
+    private int count;
+
+    public RacingCar(int count) {
+        this.count = count;
+    }
+
+    public void move(int count) {
+            if (count >= 4) {
+                this.count +=1;
+            }
+    }
+    public int getCount() {
+        return this.count;
+    }
+}

src/main/java/racing/RacingCars.java

@@ -0,0 +1,24 @@
+package racing;
+
+import java.util.ArrayList;
+
+public class RacingCars {
+    private ArrayList<RacingCar> cars  = new ArrayList<>();
+
+    public void addRacingCar(int count) {
+        for(int i =0; i<count; i++) {
+            RacingCar racingCar = new RacingCar(0);
+            cars.add(racingCar);
+        }
+        System.out.println(cars);
+    }
+
+    public void selectMoveCount() {
+        RandomGenerator randomGenerator = new RandomGenerator();
+        for(RacingCar car : cars) {
+            car.move(randomGenerator.get());
+        }
+    }
+
+    public ArrayList<RacingCar> getCars() {return cars;}
+}

src/main/java/racing/RacingGame.java

@@ -0,0 +1,22 @@
+package racing;
+
+import java.util.Scanner;
+
+public class RacingGame {
+    final static private RacingCars cars = new RacingCars();
+
+    public static void main(String[] args) {
+
+            InputView inputView = new InputView();
+
+
+            cars.addRacingCar(inputView.askCarCount());
+
+            int count = inputView.askMoveCount();
+
+            for(int i =1; i<=count; i++) {
+                cars.selectMoveCount();
+                ResultView.viewMovingCar(cars.getCars(),i);
+            }
+    }
+}

src/main/java/racing/RandomGenerator.java

@@ -0,0 +1,10 @@
+package racing;
+
+import java.util.Random;
+
+public class RandomGenerator {
+    public int get() {
+        Random random = new Random();
+        return Math.abs(random.nextInt()) % 9;
+    }
+}

src/main/java/racing/ResultView.java

@@ -0,0 +1,15 @@
+package racing;
+
+import java.util.ArrayList;
+
+public class ResultView {
+    public static void viewMovingCar(ArrayList<RacingCar> cars, int count) {
+        for(RacingCar car : cars) {
+            for(int i =0; i<car.getCount(); i++) {
+                System.out.print("-");
+            }
+            System.out.println("");
+        }
+        System.out.println(count+"회차");
+    }
+}

src/test/java/SetCollectionTest.java

@@ -0,0 +1,57 @@
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class SetCollectionTest {
+    private Set<Integer> numbers;
+
+    @BeforeEach
+    void setUp() {
+        numbers = new HashSet<>();
+        numbers.add(1);
+        numbers.add(1);
+        numbers.add(2);
+        numbers.add(3);
+    }
+
+    @DisplayName("Hash 사이즈 검사 테스트")
+    @Test
+    public void testCheckSizeTest() {
+        SetCollection checkSize = new SetCollection();
+        Integer result = checkSize.getNumbersSize(this.numbers);
+        assertEquals(3, result);
+    }
+
+    @DisplayName("Hash안에 포함되어있는지 검사 테스트")
+    @Test
+    public void contains() {
+        assertThat(numbers.contains(1)).isTrue();
+        assertThat(numbers.contains(2)).isTrue();
+        assertThat(numbers.contains(3)).isTrue();
+    }
+
+    @DisplayName("중복된 메소드 제거 테스")
+    @ParameterizedTest
+    @ValueSource(ints= {1, 2, 3})
+    public void testContaionsTrueTest(int number) {
+        assertTrue(numbers.contains(number));
+    }
+
+    @DisplayName("포함된 값이 없으면 false 반환하는 테스트")
+    @ParameterizedTest
+    @CsvSource(value= {"1:true", "2:true", "3:true", "4:false", "5:false"}, delimiter = ':')
+    public void testContaionsTest(int input,boolean expected) {
+        boolean result = numbers.contains(input);
+        assertEquals(expected, result);
+    }
+    }

src/test/java/StringTest.java

@@ -0,0 +1,44 @@
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+
+import static org.assertj.core.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class StringTest {
+
+    @DisplayName("배열의 숫자값들을트 ,을 기준으로 분리하는 테스트")
+    @Test
+    public void testSplitStringTest() {
+        String[] arr = {"1","2"};
+        StringPs splitString = new StringPs();
+        String[] result1 = splitString.stringSplit("1,2");
+        assertArrayEquals(arr,result1);
+        String[] arr2 = {"1"};
+        String[] result2 = splitString.stringSplit("1");
+        assertArrayEquals(arr2,result2);
+    }
+
+    @DisplayName("()를 제거하는 테스트")
+    @Test
+    public void testSubStringTest() {
+        String str = "1,2";
+        StringPs removeString = new StringPs();
+        String result = removeString.stringSub("(1,2)");
+        assertEquals(str, result);
+    }
+
+    @DisplayName("문자를 가져올때 위치값을 벗어나면 메세지가 발생하는 부분에 대한 테스트")
+    @Test
+    public void testCharAtStringTest() {
+        String str = "b";
+        StringPs charAtString = new StringPs();
+        String result = charAtString.stringCharAt(1,"abc");
+        assertEquals(str,result);
+        assertThatThrownBy(() -> {
+            charAtString.stringCharAt(50,"abc");
+        }).isInstanceOf(IndexOutOfBoundsException.class).hasMessageContaining("String index out of range:");
+    }
+
+}