#10 effective java: item 7

2022-05-31 01:43:52 +09:00
parent 635828eb4a
commit 0310ae6b3c
9 changed files with 150 additions and 0 deletions
--- a/effective-java/src/test/java/com/example/effectivejava/chapter01/item07/optional/ChannelTest.java
+++ b/effective-java/src/test/java/com/example/effectivejava/chapter01/item07/optional/ChannelTest.java
@@ -0,0 +1,17 @@
+package com.example.effectivejava.chapter01.item07.optional;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ChannelTest {
+
+    @Test
+    void npe() {
+        Channel channel = new Channel();
+        Optional<MemberShip> optional = channel.defaultMemberShip();
+        optional.ifPresent(MemberShip::hello);
+    }
+}