Unit Testing in Spring Boot with JUnit 5 and Mockito | Part 2

n this video, we dive deeper into unit testing in Spring Boot using JUnit 5 and Mockito. This part covers the advanced annotations like @BeforeAll, @BeforeEach, @AfterAll, and @AfterEach. We also explore testing private methods using reflection and handle void methods in our unit tests. Finally, we test exceptions that are thrown during service execution. If you're looking to improve your Spring Boot testing skills, this is the perfect video for you!

🔸 Chapters:
0:00 - Introduction & Agenda
1:22 - Test Lifecycle
7:56 - Mock Void Methods
12:00 - Test Private Methods
18:32 - Test Exceptions


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Tags:

Spring Boot
JUnit 5
Mockito
Unit Testing
Spring Boot Testing
@BeforeAll
@BeforeEach
Testing Private Methods
Testing Void Methods
Java Testing
Software Testing
Spring Boot Tutorial
Spring Boot Beginner

Hashtags:

#SpringBoot #JUnit5 #Mockito #UnitTesting #SoftwareTesting #JavaDevelopment #SpringBootTutorial #BackendDevelopment #JavaTesting #DevOps #CodingTips #ProgrammingTips #TechTutorials #TestDrivenDevelopment

[sundharraaj]

Great video!!!. You have covered most of the scenarios that developer needs test. One of the best video for junit and mockito i ever seen in YouTube

[rahulkharapkar]

kaash ye video mujhe 3 saal pahle milta, i still remember mujhe bahot mushkil gayi thi uss waqt iske resource dhundne me. watching it now for interviews, excellent explanation, thanks

[universal]

Exceptional explanation for sure! Please make another part to cover miscellaneous things like how do we test repository methods like saveAll(), Save() etc. Also, how to test the controller, repository layers. Without these, this series feels incomplete. Thanks again for such great content.

[venkatchundru]

🎯 Key points for quick navigation:

00:05 *🎥 Introduction to unit testing in Spring Boot with focus on advanced concepts, particularly test life cycle and related annotations.*
41:10 *🔄 Overview of video agenda: exploring test life cycle, using Mockito’s `doNothing()`, testing private methods, and handling exceptions.*
01:36:17 *⚙️ The unit testing life cycle: explains the order of test execution and setup/cleanup methods.*
08:00:00 *🔧 Mockito's `doNothing()`: useful for mocking void methods (e.g., `deleteById`), ensures no action occurs while verifying method calls.*
09:22:09 *✅ Mockito’s `verify()`: used for checking if certain methods (like `deleteById`) are called a specific number of times.*
12:08:16 *🔐 Testing private methods: private methods are tested indirectly via public methods, but Java Reflection can be used to access and test them separately.*
15:23:42 *🔍 Using Java Reflection: allows access to private methods for testing, useful for testing private methods that cannot be directly invoked.*
19:35:09 *🧪 Testing exceptions: `assertThrows` in JUnit 5 is used to verify if a method throws an expected exception (e.g., `RuntimeException`) when invalid input is provided.*
22:46 *🔄 Verification mode "never" checks that a method is never called during the test.*
23:29 *🚨 Changing product properties during test setup can fix test failures.*
24:40 *🎓 The video covers advanced unit testing concepts, including annotations, test lifecycle, and exception handling.*

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[chodisettiananth]

Bro the videos are fantastic, could you please do a complete tutorial playlist junit 5 and mockito on springboot, there are no good playlists available anywhere, it would be very helpful for us and hopefully your channel would get the recognition it needed because of that!

[saikumarkatta]

could you please test static methods also

[ShivaKumarSatakuri]

Bro, great content as always. Keep going. I have a request, can you make video in this mockito series where we have to write test cases with jdbc using @JdbcTest, @Sql with schema.sql and test-data.sql configured only for junit testing using in memeory h2 database?