diff --git "a/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/LoginService.java" "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/LoginService.java"
new file mode 100644
index 0000000..a2e6be6
--- /dev/null
+++ "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/LoginService.java"
@@ -0,0 +1,30 @@
+package com.hou27.chap08;
+
+public class LoginService {
+
+  private String authKey = "some_key";
+  private CustomerRepository customerRepository;
+
+  public LoginService(CustomerRepository customerRepository) {
+    this.customerRepository = customerRepository;
+  }
+
+  public LoginResult login(String id, String password) {
+    int resp = 0;
+    boolean authorized = AuthUtil.authorize(authKey); // 정적 메서드를 사용
+    if (authorized) {
+      resp = AuthUtil.authenticate(id, password); // 정적 메서드를 사용
+    } else {
+      resp = -1;
+    }
+
+    if (resp == -1) {
+      return LoginResult.badAuthKey();
+    } else if (resp == 1) {
+      return LoginResult.success();
+    } else {
+      return LoginResult.fail();
+    }
+  }
+
+}
diff --git "a/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/PaySync.java" "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/PaySync.java"
new file mode 100644
index 0000000..b3a8ce5
--- /dev/null
+++ "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/PaySync.java"
@@ -0,0 +1,32 @@
+package com.hou27.chap08;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.stream.Collectors;
+
+public class PaySync {
+  private PayInfoDao payInfoDao;
+  private String filePath = "tmp/paydata/payinfo.csv";
+
+  // 생성자를 통해 의존성을 주입받는다.
+  public PaySync(PayInfoDao payInfoDao) {
+    this.payInfoDao = payInfoDao;
+  }
+
+  // 경로를 설정 가능하게 메서드 생성
+  public void setFilePath(String filePath) {
+    this.filePath = filePath;
+  }
+
+  public void sync() throws IOException {
+    Path path = Path.of(filePath);
+    List<PayInfo> payInfos = Files.lines(path)
+        .map(line -> {
+          String[] data = line.split(",");
+          return new PayInfo(data[0], Integer.parseInt(data[1]));
+        }).collect(Collectors.toList());
+
+    payInfos.forEach(pi -> payInfoDao.insert(pi));
+  }
+}
diff --git "a/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/Times.java" "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/Times.java"
new file mode 100644
index 0000000..e9694c1
--- /dev/null
+++ "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/Times.java"
@@ -0,0 +1,9 @@
+package com.hou27.chap08;
+
+import java.time.LocalDate;
+
+public class Times {
+  public LocalDate today() {
+    return LocalDate.now();
+  }
+}
diff --git "a/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/UserPointCalculator.java" "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/UserPointCalculator.java"
new file mode 100644
index 0000000..e1733ce
--- /dev/null
+++ "b/\352\271\200\354\240\225\355\230\270/src/test/java/com/hou27/chap08/UserPointCalculator.java"
@@ -0,0 +1,62 @@
+package com.hou27.chap08;
+
+import java.time.LocalDate;
+
+public class UserPointCalculator {
+
+  private SubscriptionDao subscriptionDao;
+  private ProductDao productDao;
+  private Times times;
+
+  public UserPointCalculator(
+      SubscriptionDao subscriptionDao,
+      ProductDao productDao,
+      Times times
+  ) {
+    this.subscriptionDao = subscriptionDao;
+    this.productDao = productDao;
+    this.times = times;
+  }
+
+  public int calculatePoint(User u) {
+    Subscription s = subscriptionDao.selectByUser(u);
+    if(s == null) {
+      throw new NoSubscriptionException();
+    }
+
+    Product p = productDao.selectById(s.getProductId());
+//    LocalDate now = LocalDate.now(); // 현재 날짜를 구한다.
+    LocalDate now = times.today(); // 현재 날짜를 구한다.
+    PointRule rule = new PointRule();
+    int point = rule.calculate(s, p, now);
+//    int point = 0;
+//    if(s.isFinished(now)) { // 현재 시간에 따라 결과가 달라진다.
+//      point += p.getDefaultPoint();
+//    } else {
+//      point += p.getDefaultPoint() + 10;
+//    }
+//
+//    if(s.getGrade() == GOLD) {
+//      point += 100;
+//    }
+
+    return point;
+  }
+}
+
+class PointRule {
+  public int calculate(Subscription s, Product p, LocalDate now) {
+    int point = 0;
+    if(s.isFinished(now)) {
+      point += p.getDefaultPoint();
+    } else {
+      point += p.getDefaultPoint() + 10;
+    }
+
+    if(s.getGrade() == GOLD) {
+      point += 100;
+    }
+
+    return point;
+  }
+}
\ No newline at end of file