> 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/2025-04-01.md).

# 2025-04-01

This release of Diffblue Cover focuses on enhancing test generation for modern Java frameworks, improving command-line interface (CLI) efficiency and configuration options, and increasing plugin usability.

* **Framework Support & Test Generation**: Added test generation for Guice `AbstractModules` and uses `@MockitoBean` for `spring-test` 6.2.0 or newer. New fields are now inserted alphabetically.
* **CLI Efficiency & Configuration**: The CLI now supports targeted restarts via `--resume-from-module` and allows constant field values (e.g., enums) in `DiffblueRules.yml`.
* **Plugin Usability**: Resolved an issue causing potential loss of edits during Test Review in the Plugin.

## Enhancements

* CLI & Plugin: When writing Spring Boot tests, Diffblue Cover now defaults to `@MockitoBean` if spring-test version 6.2.0 or newer is detected in the project. \[Ref: TG-22890]
* CLI: Diffblue Cover now supports targeted restarts with the `--resume-from-module` option. This allows for more efficient test generation by starting from a specific module. \[Ref: TG-22889]
* Plugin: Resolved an issue where Diffblue Cover’s Test Review feature could lose edits. This ensures that changes made to tests are maintained throughout the review process for a given method. \[Ref: TG-22844]
* CLI & Plugin: Diffblue Cover now inserts new fields alphabetically by name within generated test classes. Previously, new fields were appended to the end. This improves test class organization. \[Ref: TG-22761]
* CLI: Diffblue Cover now supports constant field values in `DiffblueRules.yml`. This new "field rule type" allows specifying static final fields, including enum constants, as custom inputs. \[Ref: TG-22745]
* CLI & Plugin: Diffblue Cover now generates unit tests for code that utilizes Guice AbstractModules. This enables test writing for projects employing this specific Guice dependency injection pattern. \[Ref: TG-22156]

## Resolved Issues

* CLI & Plugin: Resolved an issue which caused Diffblue Cover to write assertions for Mockito generated classes. This prevents compilation errors and test removal. \[Ref: TG-22884]
* CLI: Resolved an issue where Cover generated duplicate and non-descriptive tests for Jersey 2 code. The fix restores the generation of informative test names and Javadoc comments, enhancing test understanding and debugging. \[Ref: TG-22878]
* CLI: Resolved an incorrect recommendation for Cover Annotations on Gradle projects. Cover now recommends `compileOnly` AND `testImplementation` for the correct dependency configuration. \[Ref: TG-22877]

## 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]