HotSpot is the name of the JVM. This Java enhancement was intended to support the development of C++ unit tests for the JVM. Here is a partial, non-prioritized, list of goals for this enhancement:

• Command line testing
• Creating appropriate documentation
• Debugging compile targets
• Framework elasticity
• IDE support
• Individual and isolated unit testing
• Individualized test results
• Integrating with existing infrastructure
• Internal test support
• Positive and negative testing
• Short execution time testing
• Supporting all JDK 9 build platforms
• Test compile targets
• Test exclusion
• Test grouping
• Testing that requires the JVM to be initialized
• Tests co-located with source code
• Tests for platform-dependent code
• Writing and executing unit testing (for classes and methods)

This enhancement is evidence of the increasing extensibility.