add: 제어의 역전

spring-toby/java-project/src/main/java/com/javabom/toby/chapter1/term/제어의_역전/IoCContainer.java

@@ -0,0 +1,14 @@
+package com.javabom.toby.chapter1.term.제어의_역전;
+
+public class IoCContainer {
+
+    /**
+     * IoC: 제어의 역전
+     * UserService의 UserRepository 구현체에 대한 생성의 책임을 IoCContainer에 위임한다.
+     *
+     * @return
+     */
+    public UserService javabomUserService() {
+        return new UserService(new JavabomUserRepository());
+    }
+}

spring-toby/java-project/src/main/java/com/javabom/toby/chapter1/term/제어의_역전/JavabomUserRepository.java

@@ -0,0 +1,4 @@
+package com.javabom.toby.chapter1.term.제어의_역전;
+
+public class JavabomUserRepository implements UserRepository {
+}

spring-toby/java-project/src/main/java/com/javabom/toby/chapter1/term/제어의_역전/UserRepository.java

@@ -0,0 +1,4 @@
+package com.javabom.toby.chapter1.term.제어의_역전;
+
+public interface UserRepository {
+}

spring-toby/java-project/src/main/java/com/javabom/toby/chapter1/term/제어의_역전/UserService.java

@@ -0,0 +1,9 @@
+package com.javabom.toby.chapter1.term.제어의_역전;
+
+public class UserService {
+    private final UserRepository userRepository;
+
+    public UserService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+}

spring-toby/java-project/src/test/java/com/javabom/toby/chapter1/term/제어의_역전/IoCContainerTest.java

@@ -0,0 +1,16 @@
+package com.javabom.toby.chapter1.term.제어의_역전;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+class IoCContainerTest {
+
+    @DisplayName("클라이언트는 IoCContainer를 통해 UserService를 얻는다")
+    @Test
+    void ioc() {
+        IoCContainer container = new IoCContainer();
+        UserService userService = container.javabomUserService();
+    }
+
+
+}