test: books 테스트

backend/src/books/books.controller.test.ts

@@ -0,0 +1,94 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { BooksController } from './books.controller';
+import { BooksService } from './books.service';
+import { Order, PaginationOptionsDto } from 'src/common/dtos/page-options.dto';
+import { BookGetResponseDto } from './dto/books.dto';
+import { Book } from 'src/entities';
+import { NotFoundException } from '@nestjs/common';
+import { BookDetailResponseDto } from './dto/books.dto';
+import { BookIDDto } from './dto/books.dto';
+
+describe('BooksController', () => {
+  let controller: BooksController;
+  let service: BooksService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [BooksController],
+      providers: [
+        {
+          provide: BooksService,
+          useValue: {
+            findAll: jest.fn(),
+          },
+        },
+      ],
+    }).compile();
+
+    controller = module.get<BooksController>(BooksController);
+    service = module.get<BooksService>(BooksService);
+  });
+
+  describe('findAll', () => {
+    it('should return a list of books with pagination and categories', async () => {
+      const paginationOption = {
+        page: 1,
+        take: 10,
+        order: Order.ASC,
+      } as PaginationOptionsDto;
+      const books = [
+        { id: 1, title: 'Book 1', category: { name: 'Category 1' } },
+        { id: 2, title: 'Book 2', category: { name: 'Category 1' } },
+        { id: 3, title: 'Book 3', category: { name: 'Category 2' } },
+      ] as Book[];
+      const count = 3;
+
+      jest.spyOn(service, 'findAll').mockResolvedValueOnce([books, count]);
+
+      const result: BookGetResponseDto =
+        await controller.findAll(paginationOption);
+
+      expect(result).toEqual({
+        items: books,
+        categories: [
+          { name: 'Category 1', count: 2 },
+          { name: 'Category 2', count: 1 },
+        ],
+        meta: {
+          itemCount: books.length,
+          currentPage: paginationOption.page,
+          itemsPerPage: paginationOption.take,
+          totalItems: count,
+          totalPages: Math.ceil(count / paginationOption.take),
+        },
+      });
+    });
+
+    describe('findOne', () => {
+      it('should return a book detail if found', async () => {
+        const id = 1;
+        const book = {
+          id,
+          title: 'Book 1',
+          category: { name: 'Category 1' },
+        } as unknown as BookDetailResponseDto;
+
+        jest.spyOn(service, 'findOne').mockResolvedValueOnce(book);
+
+        const result = await controller.findOne({ id });
+
+        expect(result).toEqual(book);
+      });
+
+      it('should throw NotFoundException if book is not found', async () => {
+        const id = 1;
+
+        jest.spyOn(service, 'findOne').mockResolvedValueOnce(null as never);
+
+        await expect(controller.findOne({ id })).rejects.toThrow(
+          NotFoundException,
+        );
+      });
+    });
+  });
+});