Replace real infrastructure with controlled Nullables during tests.
npx skills add https://github.com/lexler/skill-factory --skill nullables
Please help me install this Agent Skill. Skill: nullables Source: https://github.com/lexler/skill-factory/tree/main/output_skills/testing/nullables Command: npx skills add https://github.com/lexler/skill-factory --skill nullables
Nullables provide production-like wrappers that run real code with controlled infrastructure I/O, letting tests exercise logic without brittle mocks and while keeping tests fast and deterministic.
High-intent search queries and answers about installing and using this skill.
Testing without mocks is achievable by using Nullables, which replace real infrastructure with controlled wrappers. This lets you run production-like code and exercise logic fast and deterministically without brittle mocks.
To verify what code writes to files or databases, use Output Tracking. The trackOutput() utility observes written results without performing real I/O, keeping tests fast and deterministic.
You can configure external system behavior like HTTP responses using ConfigurableResponses. This allows you to define external system behavior at the caller's abstraction level within your tests.
The best way to migrate from mocks to sociable tests is using Nullables. They support migration via ConfigurableResponses and Embedded Stubs, allowing tests to run real code with nullified infrastructure.
Yes, you can test code with external I/O dependencies like clocks and randomness deterministically. Nullables provide production-like wrappers to control infrastructure I/O during tests.
danielbushGuide developers in writing state-based tests using Nullables construction patterns.
SebastienDegodezTest application layer handlers with real domain objects and mocked infrastructure.
Spectra29115Extract live components into a mockup sandbox for rapid redesign and iteration.
maxritterIdentify and prevent testing anti-patterns across test files and frameworks.
