As part of Diffblue Cover’s next-generation capabilities that deliver a proven 20x productivity advantage over LLM-based coding assistants, Test Asset Insights transforms how enterprises can systematically break through test coverage barriers to achieve the coverage required for compliance, CI/CD pipelines, and M&A integrations.
For years, enterprise development teams have invested countless hours building comprehensive test suites. These tests embody deep domain knowledge, proven patterns, and battle-tested approaches unique to each codebase. Yet until now, this institutional knowledge has remained untapped, with new test generation starting from scratch rather than building upon existing test assets.
Today, that changes with Test Asset Insights—one of three breakthrough capabilities that extend Diffblue’s market-leading autonomous test generation far beyond what LLM-based coding assistants can deliver.
The Hidden Value in Your Existing Tests
Your existing test suite is more than just code coverage; it’s a blueprint of how your application should be tested. Every helper method, every test fixture, every @Before setup represents an understanding of your system’s complexities. Traditional test generation tools—and especially LLM-based assistants that require constant prompting and oversight—miss this context entirely, creating generic tests that often fail to capture the nuances of your specific implementation.
Test Asset Insights changes this paradigm completely. Instead of working in isolation, Diffblue Cover now analyzes pre-existing unit test coverage and extracts intelligence that it leverages to write additional tests. The agent learns from existing patterns, reuses established helper methods and fixtures, and builds upon domain-specific test infrastructure to generate high quality, idiomatic test coverage.
How Test Asset Insights Delivers Enterprise-Scale Results
1. Collaborative Test Generation: One File, Unified Power
With “Test asset insights,” all your tests, whether written by you or generated by Diffblue, now live together in a single location. This unification simplifies your workflow and lets you manage, modify, and maintain your entire test suite from a single place.
This unified approach delivers immediate benefits:
- Single source of truth for all your tests
- Simplified maintenance with everything in one place
- Clear ownership model through intelligent annotations that distinguish between your tests, Diffblue-contributed tests you’ve modified, and fully Diffblue-managed tests
2. Leverage Your Test Infrastructure Automatically
Your team has likely built sophisticated test setups: factory methods for complex objects, carefully initialized test fixtures, Spring contexts with specific configurations. Previously, using any test generation tool with these required manual configuration and ongoing maintenance.
With Test Asset Insights, Diffblue Cover automatically discovers and utilizes:
- Existing fields and constants in your test classes
- @Before/@After setup and teardown methods
- Helper methods and factory patterns
- Class-level annotations and configurations
As a result, the generated tests that actually work with your existing infrastructure, delivering the autonomous, guaranteed-to-compile tests that set Diffblue apart from LLM assistants that achieve only 55-88% compilation rates.
3. Intelligent Coverage Gap Analysis
Perhaps most importantly, Test Asset Insights brings intelligence to coverage expansion. By analyzing your existing test coverage first, Diffblue Cover now:
- Eliminates redundant test generation by understanding what’s already tested
- Precisely targets coverage gaps rather than blindly generating tests
- Focuses computational resources on the areas that matter most
This means faster test generation, smaller test suites, and higher-value tests that actually improve your coverage metrics.
Real-World Impact: From Hours to Minutes
Consider a typical scenario: You have a Spring service with 60% test coverage. The remaining 40% involves complex edge cases requiring specific mock configurations and test data that your team has already figured out for the covered portions.
Without Test Asset Insights Diffblue Cover generates tests from scratch, which might cause it to struggle with the complex setup required. Many generated tests fail or require manual intervention to work with your Spring configuration.
With Test Asset Insights: Diffblue Cover learns from your existing test setup, reuses your mock configurations, leverages your test factories, and generates tests that slot seamlessly into your existing test class. What once took hours of manual adjustment now happens automatically.
Built for Enterprise Scale
Tests from Tests was designed with enterprise realities in mind:
- CI Pipeline Integration: Diffblue-managed tests update automatically as your code evolves, while your modified tests remain protected, essential for maintaining coverage in fast-moving development cycles
- Minimal Disruption: Works with your existing JUnit 5.3+ setup (with JUnit 4 and TestNG support coming soon)
- Fixed-Cost Certainty: Unlike token-based LLM assistants with unpredictable costs, Diffblue’s fixed pricing scales predictably
Getting Started is Simple
Activating Tests from Tests requires no complex migration:
- Update to the latest version of Diffblue Cover
- Run dcover create with the –merge flag
- Watch as Diffblue Cover intelligently integrates with your existing tests
Your existing test structure remains intact, your tests continue to run as before, and new AI-generated tests seamlessly join your test suite.
The Future of Test Generation is Collaborative
Your test suite is one of your most valuable development assets. With Test Asset Insights, that value compounds exponentially. The domain knowledge, patterns, and infrastructure you’ve built over the years can now power intelligent, context-aware test generation that understands not just your code, but how you test it.
Your existing tests are no longer just passive coverage statistics.
Start Maximizing Your Test Assets Today
Test Asset Insights is available immediately as part of the next generation of Diffblue Cover. Start your free trial or contact our team for a supported proof-of-value evaluation to see how Test Asset Insights can transform your path to 80% coverage.
Ready to unlock the hidden potential in your existing tests? Start your free trial or contact our team to learn how Tests from Tests can transform your test coverage strategy.
