test: 실습 2부 내용 반영

src/main/java/com/example/demo/post/domain/PostCreate.java

@@ -0,0 +1,20 @@
+package com.example.demo.post.domain;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+public class PostCreate {
+
+    private final long writerId;
+    private final String content;
+
+    @Builder
+    public PostCreate(
+        @JsonProperty("writerId") long writerId,
+        @JsonProperty("content") String content) {
+        this.writerId = writerId;
+        this.content = content;
+    }
+}