amountメソッドをmovieクラスに移動

src/main/java/video/domain/Movie.java

@@ -1,10 +1,18 @@
 package video.domain;
 
+import video.domain.price.ChildrenPrice;
+import video.domain.price.NewReleasePrice;
+import video.domain.price.RegularPrice;
+
 public class Movie {
 
     private String title;
     PriceType priceType;
 
+    private final RegularPrice regularPrice = new RegularPrice();
+    private final NewReleasePrice newReleasePrice = new NewReleasePrice();
+    private final ChildrenPrice childrenPrice = new ChildrenPrice();
+
     public Movie(String title, PriceType priceType) {
         this.title = title;
         this.priceType = priceType;
@@ -21,4 +29,17 @@ public void setPriceType(PriceType priceType) {
     public String getTitle() {
         return title;
     }
+
+    public int amount(int daysRented) {
+        switch (priceType) {
+            case REGULAR:
+                return regularPrice.amount(daysRented);
+            case NEW_RELEASE:
+                return newReleasePrice.amount(daysRented);
+            case CHILDREN:
+                return childrenPrice.amount(daysRented);
+            default:
+                throw new RuntimeException("ビデオの区分が誤っています");
+        }
+    }
 }

src/main/java/video/domain/rental/Rental.java

@@ -2,14 +2,9 @@
 
 import video.domain.Movie;
 import video.domain.PriceType;
-import video.domain.price.ChildrenPrice;
-import video.domain.price.NewReleasePrice;
-import video.domain.price.RegularPrice;
 
 public class Rental {
-    private final RegularPrice regularPrice = new RegularPrice();
-    private final NewReleasePrice newReleasePrice = new NewReleasePrice();
-    private final ChildrenPrice childrenPrice = new ChildrenPrice();
+
     private Movie movie;
     private int daysRented;
 
@@ -29,20 +24,7 @@ public Movie getMovie() {
     public int amount() {
         // 金額を計算
         int daysRented = getDaysRented();
-        return amount(daysRented);
-    }
-
-    private int amount(int daysRented) {
-        switch (movie.getPriceType()) {
-            case REGULAR:
-                return regularPrice.amount(daysRented);
-            case NEW_RELEASE:
-                return newReleasePrice.amount(daysRented);
-            case CHILDREN:
-                return childrenPrice.amount(daysRented);
-            default:
-                throw new RuntimeException("ビデオの区分が誤っています");
-        }
+        return movie.amount(daysRented);
     }
 
     public int frequentRenterPoints() {