test: 상품 목록 조회 테스트

src/test/java/com/moabam/api/application/ProductServiceTest.java

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+package com.moabam.api.application;
+
+import static com.moabam.fixture.ProductFixture.*;
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.BDDMockito.*;
+
+import java.util.List;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import com.moabam.api.domain.entity.Product;
+import com.moabam.api.domain.repository.ProductRepository;
+import com.moabam.api.dto.ProductResponse;
+import com.moabam.api.dto.ProductsResponse;
+
+@ExtendWith(MockitoExtension.class)
+class ProductServiceTest {
+
+	@InjectMocks
+	ProductService productService;
+
+	@Mock
+	ProductRepository productRepository;
+
+	@DisplayName("상품 목록을 조회한다.")
+	@Test
+	void get_products_success() {
+		// given
+		Product product1 = bugProduct();
+		Product product2 = bugProduct();
+		given(productRepository.findAll()).willReturn(List.of(product1, product2));
+
+		// when
+		ProductsResponse response = productService.getProducts();
+
+		// then
+		List<String> productNames = response.products().stream()
+			.map(ProductResponse::name)
+			.toList();
+		assertThat(response.products()).hasSize(2);
+		assertThat(productNames).containsOnly(BUG_PRODUCT_NAME, BUG_PRODUCT_NAME);
+	}
+}

src/test/java/com/moabam/api/domain/entity/ProductTest.java

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+package com.moabam.api.domain.entity;
+
+import static org.assertj.core.api.AssertionsForClassTypes.*;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import com.moabam.global.error.exception.BadRequestException;
+
+class ProductTest {
+
+	@DisplayName("상품 가격이 0 보다 작으면 예외가 발생한다.")
+	@Test
+	void validate_price_exception() {
+		Product.ProductBuilder productBuilder = Product.builder()
+			.name("X10")
+			.price(-10);
+
+		assertThatThrownBy(productBuilder::build)
+			.isInstanceOf(BadRequestException.class)
+			.hasMessage("가격은 0 이상이어야 합니다.");
+	}
+
+	@DisplayName("상품량이 1 보다 작으면 예외가 발생한다.")
+	@Test
+	void validate_quantity_exception() {
+		Product.ProductBuilder productBuilder = Product.builder()
+			.name("X10")
+			.price(1000)
+			.quantity(-1);
+
+		assertThatThrownBy(productBuilder::build)
+			.isInstanceOf(BadRequestException.class)
+			.hasMessage("수량은 1 이상이어야 합니다.");
+	}
+}

src/test/java/com/moabam/api/presentation/ProductControllerTest.java

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+package com.moabam.api.presentation;
+
+import static java.nio.charset.StandardCharsets.*;
+import static org.mockito.BDDMockito.*;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+import java.util.List;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.web.servlet.MockMvc;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.moabam.api.application.ProductService;
+import com.moabam.api.domain.entity.Product;
+import com.moabam.api.dto.ProductMapper;
+import com.moabam.api.dto.ProductsResponse;
+import com.moabam.fixture.ProductFixture;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+class ProductControllerTest {
+
+	@Autowired
+	MockMvc mockMvc;
+
+	@Autowired
+	ObjectMapper objectMapper;
+
+	@MockBean
+	ProductService productService;
+
+	@DisplayName("상품 목록을 조회한다.")
+	@Test
+	void get_products_success() throws Exception {
+		// given
+		Product product1 = ProductFixture.bugProduct();
+		Product product2 = ProductFixture.bugProduct();
+		ProductsResponse expected = ProductMapper.toProductsResponse(List.of(product1, product2));
+		given(productService.getProducts()).willReturn(expected);
+
+		// when & then
+		String content = mockMvc.perform(get("/products"))
+			.andDo(print())
+			.andExpect(status().isOk())
+			.andReturn()
+			.getResponse()
+			.getContentAsString(UTF_8);
+		ProductsResponse actual = objectMapper.readValue(content, ProductsResponse.class);
+		Assertions.assertThat(actual).isEqualTo(expected);
+	}
+}

src/test/java/com/moabam/fixture/ProductFixture.java

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+package com.moabam.fixture;
+
+import com.moabam.api.domain.entity.Product;
+import com.moabam.api.domain.entity.enums.ProductType;
+
+public class ProductFixture {
+
+	public static final String BUG_PRODUCT_NAME = "X10";
+	public static final int BUG_PRODUCT_PRICE = 3000;
+	public static final int BUG_PRODUCT_QUANTITY = 10;
+
+	public static Product bugProduct() {
+		return Product.builder()
+			.type(ProductType.BUG)
+			.name(BUG_PRODUCT_NAME)
+			.price(BUG_PRODUCT_PRICE)
+			.quantity(BUG_PRODUCT_QUANTITY)
+			.build();
+	}
+}