> For the complete documentation index, see [llms.txt](https://cover-docs.diffblue.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cover-docs.diffblue.com/updates-and-upgrades/release-archive/2025-04-02.md).

# 2025-04-02

## 2025-04-02

This release focuses on enhanced test generation for Spring Data JPA, improved object instantiation during test creation, and fixes to test addition & processing.

* **Test Generation & Support**: Test generation now supports Spring Data JPA repository interfaces utilizing composite primary keys (via `@IdClass` and `@EmbeddedId` annotations).
* **Object Instantiation**: Factory methods found in the test classpath are prioritized during object instantiation, leading to more accurate and reliable tests.
* **Resolved Issues**: An issue where existing tests were incorrectly removed during additions has been resolved (affecting static method access with different Mockito styles). Processing efficiency is improved by avoiding unnecessary testing of auto-generated code from Protobuf, gRPC, and Lombok.
* **Compatibility**: JUnit Jupiter 5.12.1 is now supported.

## Important Notices

### Deprecations

* **IntelliJ IDEA 2024.2**: **Cover 2025.04.02** is the final release supporting **IntelliJ IDEA 2024.2**. Subsequent Cover releases (starting from version **2025.05.01**) will require **IntelliJ IDEA 2024.3 or 2025.1**.

### Enhancements

* CLI & Plugin: Cover now recognizes composite keys in repository code, supporting both `@IdClass` and `@EmbeddedId` annotations. This enables test generation for Spring Data JPA repository interfaces utilizing composite primary keys. \[Ref: TG-22983]
* CLI & Plugin: Diffblue Cover now provides improved support for `java.util.Map` methods like `putIfAbsent`, `putAll`, and `compute`. This enables the generation of more tests for methods utilizing these specific map operations. \[Ref: TG-22856]
* Cover now supports JUnit Jupiter 5.12.1 \[Ref: TG-22750]
* CLI & Plugin: Cover now prioritizes factory methods found in the test classpath when creating new objects for tests. Factory methods in the main classpath can still be used but have lower priority. \[Ref: TG-22214]

### Resolved Issues

* CLI & Plugin: Resolved an issue where Cover may incorrectly remove existing tests when adding new ones. This occurred when tests accessed static methods using different Mockito import styles. \[Ref: TG-22693]
* CLI & Plugin: Resolved an issue where Cover would unnecessarily attempt to test auto-generated code written by Protobuf, gRPC, and Lombok. This prevents unnecessary processing and improves the efficiency of test generation. \[Ref: TG-22388]

### Known Issues

* Plugin: Cover incorrectly provides a menu option to write tests for a test file. \[Ref: TG-17163]
* Cover supports Open JDK and Oracle JDK; results with other JDKs may differ due to the variability in their implementations of Java. \[Ref: TG-19345]
* Reports: Cover only counts Java code towards the total line count metrics. Kotlin code is not currently included. \[Ref: TG-22088]
* Reports: Total lines of code metric can incorrectly count a multi-line comment at the end of a line of code, resulting in fewer than expected lines counted. \[Ref: TG-22089]
* Reports: Following an upgrade, the 'Total Lines of Code' card may show 0 until a new reports bundle has been uploaded. \[Ref: TG-22094]
* In some circumstances, Cover may write more simplistic tests with less meaningful assertions when Spring Boot dependency injection is disabled. \[Ref: TG-22102]
* In some circumstances, Cover will still write Spring Boot tests when Spring Boot dependency injection is disabled. \[Ref: TG-22103]
* Cover may write failing TestNG tests when Spring Boot dependency injection is disabled. \[Ref: TG-22107]
* When using Gradle, Junit 5 tests produced with the `@DisplayName` annotation may cause all the Diffblue tests to be removed from the class in validation \[Ref: TG-22784]
* Plugin: On some displays, the Test Review subsection title "Tests for review" can be malformed. \[Ref: TG-22805]
* Cover does not currently support Java 24. Please switch your JDK version to 21 or lower. \[Ref: TG-22920]