NoSuchElementException when() findById() get() thenReturn() - 腾讯云开发者社区

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Mockito.when().thenReturn

在之前的案例中，通过Mockito.when().thenReturn的方式构造了测试桩，来控制StockService.getPrice()这个方法的返回值。...when(stockService.getPrice(teslaStock)).thenReturn(500.00) 那么，如果是想多次调用getPrice()方法，会怎样呢？...(stockService.getPrice(teslaStock)) .thenReturn(500.00).thenReturn(0.0); when(stockService.getPrice...(amazonStock)) .thenReturn(1000.00).thenReturn(0.0).thenReturn(1.0);; assertThat(portfolio.getMarketValue...当没有指定调用次数的返回值时，Mockito会返回最后一次thenReturn的值。

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Difference between @Mock, @InjectMocks and @Captor

// method public ServerUser findById(final long id) { // 单元测试示例 // 错误的示例 when(serverUserDao.findById(...anyInt())).thenReturn(new ServerUser()); // 正确的示例 when(serverUserDao.findById(anyLong())).thenReturn(...我们必须为模拟对象定义when-thenReturn 方法，以及在实际测试执行期间将调用哪些类方法。...(wordMap.get("aWord")).thenReturn("aMeaning"); assertEquals("aMeaning", dic.getMeaning("aWord"))...wordMap.put(word, meaning); } public String getMeaning(final String word) { return wordMap.get

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Difference between @Mock, @InjectMocks and @Captor

// methodpublic ServerUser findById(final long id) {// 单元测试示例// 错误的示例when(serverUserDao.findById(anyInt...())).thenReturn(new ServerUser());// 正确的示例when(serverUserDao.findById(anyLong())).thenReturn(new ServerUser...我们必须为模拟对象定义when-thenReturn 方法，以及在实际测试执行期间将调用哪些类方法。当我们需要使用模拟对象初始化所有内部依赖项才能正确运行该方法时，请使用@InjectMocks。...(wordMap.get("aWord")).thenReturn("aMeaning"); assertEquals("aMeaning", dic.getMeaning("aWord"));}...wordMap.put(word, meaning); } public String getMeaning(final String word) { return wordMap.get

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Mockito入门教程：让Java单元测试变得简单有趣

：定义模拟行为的艺术基础用法when().thenReturn()是Mockito的核心语法，用来定义模拟对象的行为：```java// 简单返回值when(userRepository.findById...(1L)).thenReturn(new User("张三"));// 返回nullwhen(userRepository.findById(999L)).thenReturn(null);// 抛出异常...when(userRepository.findById(-1L)).thenThrow(new IllegalArgumentException("用户ID不能为负数"));```参数匹配器Mockito...提供了强大的参数匹配器，让你能够更灵活地定义行为：```java// 匹配任意Long类型参数when(userRepository.findById(anyLong())).thenReturn(defaultUser...);// 匹配特定条件when(userRepository.findById(longThat(id -> id > 100))).thenReturn(vipUser);// 匹配字符串when(userRepository.findByName

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【MYSQL死锁问题】Deadlock found when trying to get lock;

Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying...to get lock; try restarting transaction ### The error may involve com.longfor.tender.mapper.TdPlaInfoMapper.updatePlanDelById-Inline...### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying...to get lock; try restarting transaction ; SQL []; Deadlock found when trying to get lock; try restarting...trying to get lock; try restarting transaction at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate

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单元测试

相似用法还有 thenThrow()、thenAnswer()、thenCallRealMethod() Mockito.when(event.getName()).thenReturn("...(spy.get(0)).thenReturn("hello"); //当调用spy.get(0)时会调用真实对象的get(0)函数,此时会发生IndexOutOfBoundsException异常，因为真实...List对象是空的 //所以需要doReturn doReturn("hello").when(spy).get(0); doCallRealMethod() Event mock = mock(Event.class...(2)); Assert.assertEquals(eventService.findById(2).getAppCode(),"appCode"); } @Configuration...(){ Assert.assertNotNull(eventService.findById(2)); Assert.assertEquals(eventService.findById

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Deadlock found when trying to get lock; try restarting transaction

Cause: com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when trying to...send_status in (1,3)Cause: com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when...trying to get lock; try restarting transaction; Deadlock found when trying to get lock; try restarting...nested exception is com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when...trying to get lock; try restarting transactionat org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate

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Mockito：让单元测试变得优雅简单的神器

这就是Stub的作用：java// 当调用findById方法时，返回指定的用户对象when(mockRepository.findById(1L)).thenReturn(new User("张三")...高级特性探索参数匹配器Mockito提供了丰富的参数匹配器，让测试更加灵活：```java// 匹配任意对象when(service.process(any())).thenReturn("success...");// 匹配特定类型when(service.processUser(any(User.class))).thenReturn("user processed");// 匹配特定值when(service.getById...(eq(1L))).thenReturn(user);// 自定义匹配器when(service.processEmail(argThat(email -> email.contains("@gmail.com...异常模拟有时候我们需要测试异常情况：```java// 模拟方法抛出异常when(userRepository.findById(999L)) .thenThrow(new UserNotFoundException

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Java 软件测试（二）：Mockito与JUnit 5应用

比如when(userDao.findById(1)).thenReturn(user)就是告诉Mock对象，当调用findById(1)时返回指定的user对象。...(userRepository.findById(1L)).thenReturn(expectedUser); // 执行测试 User actualUser = userService.getUserById...).thenReturn(true); when(paymentService.processPayment(any())) .thenThrow(new PaymentException...(inventoryService.checkStock(anyString(), anyInt())).thenReturn(true); when(paymentService.processPayment...("test@example.com")).thenReturn(false); // 模拟密码加密过程，返回加密后的密码 when(passwordEncoder.encode("password123

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Mockito：让Java单元测试变得简单优雅

灵活的StubbingMockito的stubbing功能非常强大，支持各种复杂的场景：```java// 简单返回值when(mockList.get(0)).thenReturn("第一个元素");...// 抛出异常when(mockList.get(1)).thenThrow(new RuntimeException("出错了！"))...;// 连续调用返回不同值when(mockList.size()) .thenReturn(1) .thenReturn(2) .thenReturn(3);// 根据参数返回不同结果...when(userService.findById(anyLong())) .thenAnswer(invocation -> { Long id = invocation.getArgument...Mockito提供了丰富的参数匹配器：```java// 任意字符串when(mockService.process(anyString())).thenReturn("处理成功");// 任意整数when

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SpringBoot2.x 单元测试

void modifyTitileById(String id, String title) { Optional blogOptional = blogRepository.findById...String id = "1"; Mockito.when(blogRepository.findById(id)) .thenReturn(Optional.of...(new Blog())); Mockito.when(blogRepository.save(Mockito.any())) .thenReturn(new...String id = "1"; Mockito.when(blogRepository.findById(id)) .thenReturn(Optional.ofNullable...(get("/blogs")) .andExpect(status().isOk()); } /** * 测试修改博客标题成功时的情况

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Java 软件测试（三）：Mockito打桩与静态方法模拟解析

(userRepository.findById(1L)).thenReturn(new User(1L, "张三"));// 现在测试用户服务User user = userService.getUserById...MockedStatic filesMock = mockStatic(Files.class)) { // 模拟文件存在 Path testPath = Paths.get...("/test/file.txt"); filesMock.when(() -> Files.exists(testPath)).thenReturn(true); filesMock.when...timeMock = mockStatic(LocalDateTime.class)) { timeMock.when(LocalDateTime::now).thenReturn(fixedTime...failResult = new PaymentResult(false, "余额不足"); when(paymentService.charge(any())).thenReturn(

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SpringBoot开发中的关键知识点详解

Transactional public User updateUser(Long id, User userDetails) { User user = userRepository.findById...Long userId = 1L; User mockUser = new User(userId, "John", "Doe"); when...(userRepository.findById(userId)).thenReturn(Optional.of(mockUser)); User found = userService.getUserById...new User(1L, "John", "Doe"), new User(2L, "Jane", "Doe") ); when...(userService.findAll()).thenReturn(users); mockMvc.perform(get("/api/users"))

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从零到一：一个Java全栈工程师的面试实战分享

**林晨**：RESTful API的设计需要遵循一些基本原则，比如使用HTTP方法（GET、POST、PUT、DELETE）来表示操作，使用资源URI来标识资源，并且使用状态码来表示请求的结果。.../ 示例：JUnit 5单元测试 @Test public void testGetUser() { User user = new User(1L, "John", "Doe"); when...(userRepository.findById(1L)).thenReturn(Optional.of(user)); User result = userService.getUser(1L...5进行单元测试 ```java @Test public void testGetUser() { User user = new User(1L, "John", "Doe"); when...(userRepository.findById(1L)).thenReturn(Optional.of(user)); User result = userService.getUser(1L

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Spring Boot单元测试

Mockito框架提供了一些工具和注解，例如@Mock、@InjectMocks、when等。...@InjectMocks private MyService myService; @Test public void testFindById() { when...(myRepository.findById(1L)).thenReturn(new MyEntity(1L, "Hello")); String result = myService.findById...在测试方法中，我们使用when方法来模拟MyRepository的findById方法，并使用assertEquals方法来断言方法的执行结果是否符合预期。

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PHP转Java快速上手指南

Entity定义实体类，CrudRepository实现CRUD 或选择MyBatis：XML/注解方式编写SQL映射（接近PHP的PDO模式）四、关键技能迁移 HTTP请求处理替代PHP的_GET...java Copy Code @Test void testGetUser() { UserService service = mock(UserService.class); when...(service.findById(1L)).thenReturn(new User("Tom")); // 断言逻辑 } 打包部署 Maven打包：mvn clean package生成可执行的

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Mocktio 使用（上）

(mockStringList.get(0)).thenReturn("a"); when(mockStringList.get(1)).thenReturn("b");...(mockStringList.get(eq(0))).thenReturn("a"); when(mockStringList.get(eq(1))).thenReturn("b"...0 when(testList.get(0)).thenReturn("b"); Assert.assertEquals("b", testList.get(0));...// 模糊匹配 when(testList.get(anyInt())).thenReturn("c"); Assert.assertEquals(...when(testList.get(0)).thenReturn("a"); Assert.assertEquals("a", testList.get(0)); Assert.assertEquals

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从全栈开发到微服务架构：一位Java工程师的实战之路

return objectMapper.readValue(cached, Order.class); } Order order = orderRepository.findById...Test public void testGetOrderById() { Order order = new Order(1L, "Test Order"); when...(orderRepository.findById(1L)).thenReturn(Optional.of(order)); assertEquals(order, orderService.getOrderById...@Test public void testFindUserById() { User user = new User(1L, "John Doe"); when...(userRepository.findById(1L)).thenReturn(Optional.of(user)); assertEquals(user, userService.findUserById

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从全栈开发到微服务架构：一位Java工程师的实战分享

String cacheKey = "product:" + productId; Product product = (Product) redisTemplate.opsForValue().get...Test public void testGetProductById() { Product product = new Product(1L, "iPhone", 999.99); when...(productRepository.findById(1L)).thenReturn(Optional.of(product)); Product result = productService.getProductById...String cacheKey = "product:" + productId; Product product = (Product) redisTemplate.opsForValue().get...(productRepository.findById(1L)).thenReturn(Optional.of(product)); Product result = productService.getProductById

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Java全栈开发实战：从基础到微服务的完整技术栈解析

product:" + id; if (redisTemplate.hasKey(key)) { return (Product) redisTemplate.opsForValue().get...(key); } Product product = productRepository.findById(id).orElse(null); redisTemplate.opsForValue...Product(); product.setId(1L); product.setName("iPhone"); product.setPrice(6999.0); when...(productRepository.findById(1L)).thenReturn(Optional.of(product)); Product result = productService.getProductById

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点击加载更多

Mockito.when().thenReturn

Difference between @Mock, @InjectMocks and @Captor

Difference between @Mock, @InjectMocks and @Captor

Mockito入门教程：让Java单元测试变得简单有趣

【MYSQL死锁问题】Deadlock found when trying to get lock;

单元测试

Deadlock found when trying to get lock; try restarting transaction

Mockito：让单元测试变得优雅简单的神器

Java 软件测试（二）：Mockito与JUnit 5应用

Mockito：让Java单元测试变得简单优雅

SpringBoot2.x 单元测试

Java 软件测试（三）：Mockito打桩与静态方法模拟解析

SpringBoot开发中的关键知识点详解

从零到一：一个Java全栈工程师的面试实战分享

Spring Boot单元测试

PHP转Java快速上手指南

Mocktio 使用（上）

从全栈开发到微服务架构：一位Java工程师的实战之路

从全栈开发到微服务架构：一位Java工程师的实战分享

Java全栈开发实战：从基础到微服务的完整技术栈解析

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