2주차 미션 구현 완료 (박종한)

build.gradle.kts

@@ -11,9 +11,14 @@ repositories {
 
 dependencies {
     testImplementation(platform("org.junit:junit-bom:5.10.0"))
+    testImplementation("org.junit.jupiter:junit-jupiter:5.10.0")
     testImplementation("org.junit.jupiter:junit-jupiter")
 }
 
 tasks.test {
     useJUnitPlatform()
-}
+}
+
+tasks.withType<JavaCompile> {
+    options.encoding = "UTF-8"
+}

src/Main.java

@@ -0,0 +1,16 @@
+//TIP 코드를 <b>실행</b>하려면 <shortcut actionId="Run"/>을(를) 누르거나
+// 에디터 여백에 있는 <icon src="AllIcons.Actions.Execute"/> 아이콘을 클릭하세요.
+public class Main {
+
+  public static void main(String[] args) {
+    //TIP 캐럿을 강조 표시된 텍스트에 놓고 <shortcut actionId="ShowIntentionActions"/>을(를) 누르면
+    // IntelliJ IDEA이(가) 수정을 제안하는 것을 확인할 수 있습니다.
+    System.out.printf("Hello and welcome!");
+
+    for (int i = 1; i <= 5; i++) {
+      //TIP <shortcut actionId="Debug"/>을(를) 눌러 코드 디버그를 시작하세요. 1개의 <icon src="AllIcons.Debugger.Db_set_breakpoint"/> 중단점을 설정해 드렸습니다
+      // 언제든 <shortcut actionId="ToggleLineBreakpoint"/>을(를) 눌러 중단점을 더 추가할 수 있습니다.
+      System.out.println("i = " + i);
+    }
+  }
+}

src/main/java/mission/Application.java

@@ -1,7 +1,9 @@
 package mission;
 
 public class Application {
-    public static void main(String[] args) {
-        //Todo: 프로그램 구현
-    }
+  public static void main(String[] args) {
+    Controller controller = new Controller();
+    controller.run();
+  }
 }
+

src/main/java/mission/AsciiDigit.java

@@ -0,0 +1,20 @@
+package mission;
+
+public class AsciiDigit {
+  public static String[] get(char c){
+    // 각 숫자 문자에 대한 ASCII 아트 정의 (한 줄씩 개행 없이 표현)
+    return switch (c) {
+      case '0' -> new String[]{"◼◼◼", "◼ ◼", "◼ ◼", "◼ ◼", "◼◼◼"};
+      case '1' -> new String[]{"◼", "◼", "◼", "◼", "◼"};
+      case '2' -> new String[]{"◼◼◼", "  ◼", "◼◼◼", "◼  ", "◼◼◼"};
+      case '3' -> new String[]{"◼◼◼", "◼  ", "◼◼◼", "◼  ", "◼◼◼"};
+      case '4' -> new String[]{"◼ ◼", "◼ ◼", "◼◼◼", "  ◼", "  ◼"};
+      case '5' -> new String[]{"◼◼◼", "◼  ", "◼◼◼", "  ◼", "◼◼◼"};
+      case '6' -> new String[]{"◼  ", "◼  ", "◼◼◼", "◼ ◼", "◼◼◼"};
+      case '7' -> new String[]{"◼◼◼", "  ◼", "  ◼", "  ◼", "  ◼"};
+      case '8' -> new String[]{"◼◼◼", "◼ ◼", "◼◼◼", "◼ ◼", "◼◼◼"};
+      case '9' -> new String[]{"◼◼◼", "◼ ◼", "◼◼◼", "  ◼", "  ◼"};
+      default -> new String[]{"   ", "   ", "   ", "   ", "   "};
+    };
+  }
+}

src/main/java/mission/Controller.java

@@ -0,0 +1,35 @@
+package mission;
+import java.util.Scanner;
+public class Controller {
+  private final Scanner scanner = new Scanner(System.in);
+  private final Model model = new Model();
+
+  public void run() {
+    System.out.println("프린터를 실행합니다.");
+    while (true) {
+      View.printMenu();
+      int option = View.inputInt(scanner);
+      if (option == 1) print();
+      if (option == 2) View.printInk(model.getInk());
+      if (option == 3) {
+        model.replaceInk();
+        System.out.println("잉크를 교체하였습니다.");
+      }
+      if (option == 4) break;
+    }
+  }
+
+  private void print() {
+    String digits = View.inputDigits(scanner);
+    int width = View.inputWidth(scanner);
+    String[] output = model.printDigits(digits, width);
+    for (String line : output) {
+      if (!model.useInk(line)) {
+        System.out.println("잉크가 부족해 출력이 중단되었습니다.");
+        return;
+      }
+      System.out.println(line);
+    }
+    System.out.println("출력이 완료되었습니다.");
+  }
+}

src/main/java/mission/Model.java

@@ -0,0 +1,54 @@
+package mission;
+
+public class Model {
+  private static final int MAX_INK = 1000;
+  private int ink = MAX_INK;
+
+  public String[] printDigits(String input, int width) {
+    StringBuilder[] result = new StringBuilder[0];
+
+    int numChunks = (int) Math.ceil((double) input.length() / width);
+    result = new StringBuilder[numChunks * 5];
+    for (int i = 0; i < result.length; i++) {
+      result[i] = new StringBuilder();
+    }
+
+    for (int chunkIdx = 0; chunkIdx < numChunks; chunkIdx++) {
+      int start = chunkIdx * width;
+      int end = Math.min(start + width, input.length());
+      String chunk = input.substring(start, end);
+
+      for (int row = 0; row < 5; row++) {
+        for (int j = 0; j < chunk.length(); j++) {
+          char digit = chunk.charAt(j);
+          String[] art = AsciiDigit.get(digit);
+          result[chunkIdx * 5 + row].append(art[row]).append(" ");
+        }
+      }
+    }
+
+    String[] output = new String[result.length];
+    for (int i = 0; i < result.length; i++) {
+      output[i] = result[i].toString();
+    }
+    return output;
+  }
+
+  public boolean useInk(String line) {
+    int count = (int) line.codePoints()
+        .mapToObj(cp -> String.valueOf((char) cp))
+        .filter(s -> s.equals("◼"))
+        .count();
+    if (ink < count) return false;
+    ink -= count;
+    return true;
+  }
+
+  public int getInk() {
+    return ink;
+  }
+
+  public void replaceInk() {
+    ink = MAX_INK;
+  }
+}

src/main/java/mission/View.java

@@ -0,0 +1,26 @@
+package mission;
+import java.util.Scanner;
+
+public class View {
+  public static void printMenu() {
+    System.out.println("사용할 기능을 입력해주세요. 1) 출력, 2) 잉크 잔량 확인, 3) 잉크 교체, 4) 프로그램 종료");
+  }
+
+  public static int inputInt(Scanner scanner) {
+    return Integer.parseInt(scanner.nextLine());
+  }
+
+  public static String inputDigits(Scanner scanner) {
+    System.out.println("출력할 문자를 입력해주세요.");
+    return scanner.nextLine();
+  }
+
+  public static int inputWidth(Scanner scanner) {
+    System.out.println("용지 크기를 입력해주세요.");
+    return Integer.parseInt(scanner.nextLine());
+  }
+
+  public static void printInk(int ink) {
+    System.out.println("잉크 잔량 : " + ink + "/1000");
+  }
+}

src/test/java/mission/PrinterServiceTest.java

@@ -0,0 +1,60 @@
+package mission;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class PrinterServiceTest {
+
+  private Model model;
+
+  @BeforeEach
+  void setup() {
+    model = new Model();
+  }
+
+  @Test
+  public void inkStartsAtMaximum() {
+    assertEquals(1000, model.getInk());
+  }
+
+  @Test
+  public void inkDecreasesOnPrint() {
+    String[] lines = model.printDigits("0", 1);
+    for (String line : lines) {
+      model.useInk(line);
+    }
+    assertTrue(model.getInk() < 1000);
+  }
+
+  @Test
+  public void canReplaceInk() {
+    String[] lines = model.printDigits("88888888", 8);
+    for (String line : lines) {
+      model.useInk(line);
+    }
+    assertTrue(model.getInk() < 1000);
+    model.replaceInk();
+    assertEquals(1000, model.getInk());
+  }
+
+  @Test
+  public void preventPrintWhenInkIsLow() {
+    for (int i = 0; i < 100; i++) {
+      String[] lines = model.printDigits("8", 1);
+      for (String line : lines) {
+        model.useInk(line);
+      }
+    }
+    String[] lines = model.printDigits("8", 1);
+    boolean result = model.useInk(lines[0]);
+    assertFalse(result); // 잉크가 부족하므로 false 반환해야 함
+  }
+
+  @Test
+  public void printDigitsGeneratesFiveLines() {
+    String[] output = model.printDigits("123", 3);
+    assertEquals(5, output.length);
+  }
+
+}