2025-10-01

Enables precise control over test inputs with the new @InTestsUseFactories annotation and enhances test quality with improved javax.servlet tests and broader assertDoesNotThrow assertions. This release also adds Mockito 5.20.0 support and resolves several test generation failures.

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Improved Test Quality & Control

• Precise Input Control: Diffblue Cover now supports the @InTestsUseFactories annotation, enabling you to guide test generation by specifying which factory methods should be used to create objects for a given test.

• Higher Quality Servlet Tests: Cover now generates higher quality tests for projects using javax.servlet. For the best results, add the spring-test dependency to your project, which allows Cover to use Spring's MockHttp classes for test creation.

Framework Support & Compatibility

• Mockito 5.20.0 Support: Diffblue Cover now supports Mockito Core version 5.20.0, ensuring full compatibility for tests generated in projects that use this version of the mocking framework.

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Enhancements

• Diffblue Cover now supports Mockito Core version 5.20.0, ensuring test compatibility for projects using this version. [Ref: TG-23807]

• Diffblue Cover now generates higher quality tests for projects using javax.servlet. Adding the spring-test dependency produces more effective tests by using Spring's MockHttp classes to accurately simulate HTTP requests and responses. [Ref: TG-23095]

• Diffblue Cover now supports the @InTestsUseFactories annotation to provide more precise control over test inputs. This annotation guides test generation by specifying which factory methods Cover must use to create objects for a given test. [Ref: TG-21232]

Resolved Issues

• Resolved an issue that caused Cover to report R011 or R081 output codes when writing tests for code using log4j or Mockito. These failures were due to sandbox policy violations during localhost resolution. [Ref: TG-23827]

• Resolved an issue that limited assertDoesNotThrow test cases. Diffblue Cover now writes these assertions for any validation method, not just those named 'validate', improving test coverage for methods that do not follow a specific naming convention. [Ref: TG-23762]

• Resolved a test generation failure (F009) that occurred when a method from an instance was referenced multiple times within the method under test. This fix applies to instances created with a parameterized constructor or a factory. [Ref: TG-23416]

Known Issues

• Plugin: Diffblue Cover incorrectly displays a menu option to write tests for existing test files. [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]

• Cover may encounter an F009 (Internal error) caused by a ClassCircularityError involving org/mockito/configuration/MockitoConfiguration when writing tests with Mockito 5. The recommended workaround is to downgrade to Mockito 4.x. [Ref: TG-19610]

• 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]

• 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]

• Plugin: On some displays, the Test Review subsection title 'Tests for review' is malformed. [Ref: TG-22805]

• When test formatting settings are changed, the Test Review feature may incorrectly remove the @ManagedByDiffblue annotation from tests, particularly in cases involving static import formatting changes. [Ref: TG-23750]