JUnit 6.0.1 Upgrade

JUnit 6.0.1 Upgrade

This release upgrades JUnit Jupiter from version 5.11.3 to 6.0.1 across all unit testing and test-driven development projects.

Projects Updated

Section 10: Unit Testing Quick Start (9 projects)

• 00-starting-project
• 01-assert-equals-not-equals-AND-null-not-null
• 02-lifecycle-methods
• 03-custom-display-name
• 04-assert-same-not-same-AND-true-false
• 05-project-solution-assert-array-iterable-lines
• 06-assert-throws-and-timeouts
• 07-order-tests
• 08-conditional-tests

Section 11: Test-Driven Development Quick Start (3 projects)

• 01-fizzbuzz-project-solution-basic
• 02-fizzbuzz-project-solution-parameterized-tests
• 03-fizzbuzz-project-solution-main-app

Changes

• Updated all pom.xml files to use JUnit Jupiter 6.0.1
• Updated test files for compatibility
• Improved XML formatting consistency

Version Details

• Previous version: 5.11.3
• New version: 6.0.1

Spring Boot 4.0.1

Spring Boot 4.0.1 Upgrade

Upgraded all Spring Boot projects from version 3.5.9 to 4.0.1.

Projects Updated

• section-12-spring-boot-3-quick-start/01-spring-boot-demo
• section-13-spring-boot-3-rest-apis-quick-start (4 projects)
• section-14-spring-boot-3-spring-mvc-quick-start (2 projects)

Key Changes

• Updated spring-boot-starter-parent to 4.0.1
• Replaced spring-boot-starter-web with spring-boot-starter-webmvc
• Replaced spring-boot-starter-test with spring-boot-starter-webmvc-test
• Added spring-boot-starter-thymeleaf-test for Thymeleaf projects

Verification

All 7 projects successfully built and tested with Maven. All applications start successfully with no errors or breaking changes.

Compatibility

• Java 25 compatible (exceeds Java 17 minimum requirement)
• No Java code changes required
• Already using jakarta.annotation (not legacy javax)

Spring Boot 3.5.9

Spring Boot 3.5.9 Upgrade

Updated all Spring Boot projects from version 3.5.5 to 3.5.9.

Projects Updated

• section-12-spring-boot-3-quick-start/01-spring-boot-demo
• section-13-spring-boot-3-rest-apis-quick-start (4 projects)
• section-14-spring-boot-3-spring-mvc-quick-start (2 projects)

Key Dependency Versions

• Spring Framework: 6.2.15
• Apache Tomcat: 10.1.50
• Jackson: 2.19.4
• Spring Data: 2025.0.7

Verification

All 7 projects successfully built and tested with Maven. All applications start successfully with no errors or breaking changes.