Tag: mockito

spring boot November 18, 2020 4 min read by Halit Talha Türe 1 comment

Mocking Spring Data DateTimeProvider

In this article, we will demonstrate an integration test where we have to persist the entities with mocked auditing date fields when JPA Auditing is enabled. Technologies used: Spring Boot 2.4.0 Spring 5.3.1 JUnit Jupiter 5.7.0 Tomcat embed 9.0.39 Java 8 1. Project Dependencies pom.xml <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.h2database</groupId> […]

spring boot March 3, 2019 1 min read by mkyong 9 comments

Spring + Mockito – Unable to mock save method?

Try to mock a repository save() method, but it is always returning null? P.S Tested with Spring Boot 2 + Spring Data JPA @Test public void save_book_OK() throws Exception { Book newBook = new Book(1L, "Mockito Guide", "mkyong"); when(mockRepository.save(newBook)).thenReturn(newBook); mockMvc.perform(post("/books") .content("{json}") .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON)) .andExpect(status().isCreated()); } Solution 1. Mockito uses the equals for argument matching, try […]

spring boot March 1, 2019 1 min read by mkyong 12 comments

Mockito – How to mock repository findById thenReturn() Optional?

Try to mock a repository findById method, but no idea use thenReturn() to return an object, as it accepts an Optional? P.S Tested in Spring Boot 2 environment import static org.mockito.Mockito.*; import org.springframework.boot.test.mock.mockito.MockBean; @MockBean private BookRepository mockRepository; @Before public void init() { Book book = new Book(1L, "A Book"); //error, can’t resolve method thenReturn(book)? when(mockRepository.findById(1L)).thenReturn(book); […]

spring boot February 13, 2019 2 min read by mkyong 5 comments

Mockito – when() requires an argument which has to be ‘a method call on a mock’

Run the following Spring Boot + JUnit 5 + Mockito integration test. package com.mkyong.core.services; import com.mkyong.core.repository.HelloRepository; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.DisplayName; import org.junit.jupiter.api.Test; import org.mockito.InjectMocks; import org.mockito.Mock; import org.springframework.boot.test.context.SpringBootTest; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.mockito.Mockito.when; @SpringBootTest public class HelloServiceMockTest { @Mock private HelloRepository helloRepository; @InjectMocks // auto inject helloRepository private HelloService helloService = new HelloServiceImpl(); @BeforeEach […]

spring boot February 12, 2019 5 min read by mkyong 19 comments

Spring Boot + JUnit 5 + Mockito

In this article, we will show you how to do Spring Boot 2 integration test with JUnit 5, and also Mockito. Spring Boot 2.1.2.RELEASE JUnit 5 Mockito 2 Maven 3 In short, exclude junit4 from spring-boot-starter-test, and include the JUnit 5 jupiter engine manually, done. Let see the following Spring boot MVC web application, and […]

unit test June 28, 2016 7 min read by mkyong 9 comments

Unit Test – What is Mocking? and Why?

In simple, mocking is creating objects that mimic the behavior of real objects. Refer to the following case study : Tested : Java 1.8 JUnit 4.12 Mockito 2.0.73-beta Mock Object Read this Wikipedia Mock object. 1. Java Examples A simple Author and Book example. 1.1 BookService to return a list of books by author name. […]