Let's become expert of unit testing java spring boot rest api application using Junit , AssertJ , Mockito , H2Database , Springframework test package libraries / frameworks. This is a full one shot course on software unit testing java spring boot applications. In this tutorial, Cloud Vendor API is further evolved and junit test cases are written for all 3 layers i.e. controller layer , service layer and repository layer. All layers are unit tested using junit, assertj, mockito, h2database and springframework test package . Code coverage method is also demonstrated in this session. Software testing expected from java developers is explained here.
Unit Testing is mandatory task to perform in java projects from every Java developer. Unit testing java projects helps to enhance java code quality and prevents java spring boot application from bugs. This tutorial will be helpful for backend developers and also for full stack developers.
Some notes -
JUNIT -
Unit testing framework for Java and its frameworks.
JUnit 5 is the next generation of JUnit.
The goal is to create an up-to-date foundation for developer-side testing on the JVM. This includes focusing on Java 8 and above, as well as enabling many different styles of testing.
AssertJ -
AssertJ is a Java library that provides a rich set of assertions and truly helpful error messages.
It improves test code readability, and is designed to be super easy to use within your favorite IDE.
Mockito -
Mockito is a mocking framework for Java.
It lets you write beautiful tests with a clean & simple API.
The tests are very readable and they produce clean verification errors.
Mockito 3.x requires Java 8 or above.
H2 Database -
H2 Database is Java SQL Database
Very fast and open source
Used as In-Memory Database
Spring Boot can auto-configure embedded H2 databases.
Key Annotations -
@SpringBootApplication
@Test
@DataJpaTest
@WebMvcTest
@Mock
@MockBean
@Autowired
@BeforeEach
@AfterEach
and more...
Spring Boot Session Links are given below -
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GitHub link for CloudVendorApi code -
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#thinkconstructive #eshapuri #junit #junit5 #springboot
Chapters
00:00:00 Welcome
00:01:33 What is Unit Testing and Importance of Unit Testing
00:02:11 Java Spring Boot Project Design Overview
00:04:39 What is Junit ?
00:06:13 What is AssertJ ?
00:08:20 What is Mockito ?
00:09:26 What is H2 Database ?
00:11:17 Cloud Vendor API Software Project Overview
00:13:02 JUNIT Test Package Structure
00:13:50 Maven Dependency in pom.xml inclusion and verification
00:18:41 test/java/resources/application.yaml or test/java/resources/application.properties file content and structure
00:21:54 Repository Layer Test Cases : Java Spring Boot REST API
00:44:23 Service Layer Test Cases : Java Spring Boot REST API
01:09:54 Code Coverage using Intellij for Java REST API Repository Layer and Service Layer
01:12:59 Controller Layer Test Cases : Java Spring Boot REST API
01:36:32 Code Coverage using Intellij for Java REST API Controller Layer
01:39:00 Summary
01:40:25 Thank You
Queries
how to write unit test in java spring boot
how to write unit test in java spring boot rest
what is junit5 library
what is assertj library
what is mockito library
how to use h2database
what is spring boot test
how to write test case in java spring boot
how to test controller layer code
how to test service layer code
how to test repository layer code
how to check code coverage
how to check code coverage of java spring boot application
how to verify code coverage of java project
how to run junit test
