feat: 중위 표기법 입력을 계산하는 클래스를 클래스 합성을 통해 구현

Author: ksundong

yoonexample/src/main/java/stack/InfixCalculator.java

@@ -0,0 +1,11 @@
+package stack;
+
+public class InfixCalculator {
+
+  InfixToPostfix infixToPostfix = new InfixToPostfix();
+  PostCalculator postCalculator = new PostCalculator();
+
+  public int calculate(String input) {
+    return postCalculator.calculate(infixToPostfix.convertInputToPostfix(input));
+  }
+}

yoonexample/src/main/java/stack/InfixToPostfix.java

@@ -4,6 +4,10 @@
 
 public class InfixToPostfix {
 
+  public char[] convertInputToPostfix(String input) {
+    return this.convertInfixToPostfix(this.convertInputToCharArray(input));
+  }
+
   public char[] convertInputToCharArray(String input) {
     return input.replace(" ", "").toCharArray();
   }

yoonexample/src/test/java/stack/InfixCalculatorTest.java

@@ -1,5 +1,7 @@
 package stack;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;