feat: Brand 엔티티 생성

backend/src/main/java/zipgo/brand/domain/Brand.java

@@ -0,0 +1,45 @@
+package zipgo.brand.domain;
+
+import static jakarta.persistence.GenerationType.IDENTITY;
+import static lombok.AccessLevel.PROTECTED;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.EqualsAndHashCode;
+import lombok.EqualsAndHashCode.Include;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@Entity
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor(access = PROTECTED)
+@EqualsAndHashCode(onlyExplicitlyIncluded = true)
+public class Brand {
+
+    @Id
+    @Include
+    @GeneratedValue(strategy = IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String name;
+
+    @Column(nullable = false)
+    private String nation;
+
+    @Column
+    private Long foundedYear;
+
+    @Column(nullable = false)
+    private boolean hasResearchCenter;
+
+    @Column(nullable = false)
+    private boolean hasResidentVet;
+
+}

backend/src/test/java/zipgo/brand/domain/BrandTest.java

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+package zipgo.brand.domain;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+class BrandTest {
+
+    @Test
+    void 아이디가_같으면_동등하다() {
+        Brand 브랜드_1 = new Brand(2L, "사료만드는 삼성", "대한민국", 1999L, true, false);
+        Brand 브랜드_2 = new Brand(2L, "사료만드는 토스", "대한민국", 2090L, true, false);
+
+        assertThat(브랜드_2).isEqualTo(브랜드_1);
+    }
+
+    @Test
+    void 아이디가_다르면_동등하지않다() {
+        Brand 브랜드_1 = new Brand(1L, "사료만드는 삼성", "대한민국", 1999L, true, false);
+        Brand 브랜드_2 = new Brand(2L, "사료만드는 토스", "대한민국", 2090L, true, false);
+
+        assertThat(브랜드_2).isNotEqualTo(브랜드_1);
+    }
+
+}