### Question:
ProductServiceImpl implements ProductService { @Override public Result updateProduct(ProdUpdateReq prodUpdateReq) { int result = productDAO.updateProduct(prodUpdateReq); if (result == 0){ throw new CommonBizException(ExpCodeEnum.PRODUCT_UPDATE_FAIL); } return Result.newSuccessResult(); }  @Override Result createProduct(ProdInsertReq prodInsertReq); @Override Result updateProduct(ProdUpdateReq prodUpdateReq); @Override Result<List<ProductEntity>> findProducts(ProdQueryReq prodQueryReq); @Override Result createCategoty(CategoryEntity categoryEntity); @Override Result modifyCategory(CategoryEntity categoryEntity); @Override Result deleteCategory(String categoryId); @Override Result createBrand(BrandInsertReq brandInsertReq); @Override Result modifyBrand(BrandInsertReq brandInsertReq); @Override Result<List<CategoryEntity>> findCategorys(CategoryQueryReq categoryQueryReq); @Override Result<List<BrandEntity>> findBrands(BrandQueryReq brandQueryReq); void checkBrandParam(BrandInsertReq brandInsertReq);  }### Answer:
@Test public void testUpdateProduct() throws Exception { ProdUpdateReq prodUpdateReq = new ProdUpdateReq(); prodUpdateReq.setId("c142339174e74536bcbe3d277e22e031"); prodUpdateReq.setContent("不好吃不要钱"); productService.updateProduct(prodUpdateReq); }