[문자열 계산기] 김난슬 미션 제출합니다.

src/main/java/calculator/controller/CalculatorController.java

@@ -6,8 +6,13 @@
 
 public class CalculatorController {
     public void startCalculator() {
-        String input = InputView.getInput();
-        int result = Calculator.processSum(input);
-        OutputView.printResult(result);
+        try {
+            String input = InputView.getInput();
+            int result = Calculator.processSum(input);
+            OutputView.printResult(result);
+        } catch (IllegalArgumentException e) {
+            OutputView.printError(e.getMessage());
+            throw e;
+        }
     }
 }

src/main/java/calculator/model/Calculator.java

@@ -4,7 +4,6 @@
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.util.stream.Collectors;
 
 public class Calculator {
     public static int processSum(String numbers) {
@@ -22,12 +21,28 @@ public static int processSum(String numbers) {
             numbers = matcher.group(2);
         }
 
+        if (numbers.trim().isEmpty()) {
+            throw new IllegalArgumentException("커스텀 구분자 이후 숫자가 없습니다.");
+        }
+
         String delimiterRegex = String.join("|", delimiters);
 
         return Arrays.stream(numbers.split(delimiterRegex))
                 .map(String::trim)
                 .filter(num -> !num.isEmpty())
-                .mapToInt(Integer::parseInt)
+                .mapToInt(Calculator::parseValidation)
                 .sum();
     }
+
+    private static int parseValidation(String num) {
+        try {
+            int value = Integer.parseInt(num);
+            if (value < 0) {
+                throw new IllegalArgumentException("음수는 입력할 수 없습니다: " + num);
+            }
+            return value;
+        } catch (NumberFormatException e) {
+            throw new IllegalArgumentException("잘못된 숫자 입력: " + num);
+        }
+    }
 }

src/main/java/calculator/view/InputView.java

@@ -4,7 +4,7 @@
 
 public class InputView {
     public static String getInput() {
-        System.out.print("문자열을 입력하세요:");
+        System.out.print("문자열을 입력하세요 :");
         String userInputValue = Console.readLine();
 
         return userInputValue;

src/main/java/calculator/view/OutputView.java

@@ -2,6 +2,9 @@
 
 public class OutputView {
     public static void printResult(int result) {
-        System.out.println("결과: " + result);
+        System.out.println("결과 : " + result);
+    }
+    public static void printError(String message) {
+        System.out.println("오류 발생 : " + message);
     }
 }

src/test/java/calculator/ApplicationTest.java

@@ -16,13 +16,13 @@ class ApplicationTest extends NsTest {
         });
     }
 
-//    @Test
-//    void 예외_테스트() {
-//        assertSimpleTest(() ->
-//            assertThatThrownBy(() -> runException("-1,2,3"))
-//                .isInstanceOf(IllegalArgumentException.class)
-//        );
-//    }
+    @Test
+    void 예외_테스트() {
+        assertSimpleTest(() ->
+            assertThatThrownBy(() -> runException("-1,2,3"))
+                .isInstanceOf(IllegalArgumentException.class)
+        );
+    }
 
     @Override
     public void runMain() {