feat: post モデルの実装

src/main/kotlin/dev/sunabak0/akiyadego/domain/Post.kt

@@ -0,0 +1,49 @@
+package dev.sunabak0.akiyadego.domain
+
+/**
+ * 投稿
+ *
+ * @property id
+ * @property imagePath
+ * @property title
+ * @property category
+ * @property prefecture
+ * @property description
+ * @property userId
+ * @property createdAt
+ * @constructor Create empty Post
+ */
+data class Post(
+    val id: Int,
+    val imagePath: String,
+    val title: String,
+    val category: String,
+    val prefecture: String,
+    val description: String,
+    val userId: Int,
+    val createdAt: String,
+) {
+    /**
+     * Factory メソッド
+     */
+    companion object {
+        /**
+         * Validation 有り
+         */
+        fun new(
+            id: Int,
+            imagePath: String,
+            title: String,
+            category: String,
+            prefecture: String,
+            description: String,
+            userId: Int,
+            createdAt: String,
+        ): Post {
+            if (title.isEmpty()) {
+                return IllegalArgumentException("タイトルが1文字未満です")
+            }
+            return Post(id, imagePath, title, category, prefecture, description, userId, createdAt)
+        }
+    }
+}

src/test/kotlin/dev/sunabak0/akiyadego/domain/PostTest.kt

@@ -0,0 +1,28 @@
+package dev.sunabak0.akiyadego.domain
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+
+class PostTest {
+    @Test
+    fun `投稿のタイトルの文字数が違反していたら投稿の生成に失敗する`() {
+        /**
+         * given:
+         */
+
+        /**
+         * when:
+         * -
+         */
+
+        /**
+         * then:
+         * - タイトルを検査
+         */
+        val e = assertThrows<IllegalArgumentException> {
+            Post.new(1, "/path", "", "akiya", "tokyo", "空き家の説明", 1, "20230117-12:00:00")
+        }
+        assertEquals(e.message, "タイトルが1文字未満です")
+    }
+}