# Test Observable Behavior

> A technique for asserting on a unit's outputs and effects instead of on the internal calls it makes.

Record: `lexicon:test-observable-behavior`
Kind: technique
Layer: [Computation Core](https://banes-lab.com/records/layer/computation-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-test-observable-behavior

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Inject Clock and Randomness](https://banes-lab.com/records/lexicon/inject-clock-and-randomness.md) and before [Fake at the Boundary](https://banes-lab.com/records/lexicon/fake-at-the-boundary.md).

## Category

- [Correctness / Determinism / Verification](https://banes-lab.com/records/lexicon-category/correctness-determinism-verification.md)

## Refactors

- [Mock Mirage](https://banes-lab.com/records/architecture/mock-mirage.md)

## Linked from

- [Anti-patterns](https://banes-lab.com/ontology/principles/architecture-category-anti-patterns.md)