BAC-L2-COSMOS-117Cosmos SDK
Testing a Cosmos application
From keeper unit tests to integration tests on a simulated network: the only thing separating a shippable chain from a prototype.
- Level
- L2 — Appchain developer
- Duration
- 4 h
- Track
- Cosmos SDK
- Maintainer
- Cosmos Lead Architect
Learning objectives
- 01Test a keeper in isolation from the chain
- 02Write an end-to-end integration test
- 03Replay a load scenario on a simulated network
Guided lab
Raise the business module's coverage past the required threshold, rejection cases included.
Independent lab
Write a simulation running thousands of random operations and checking invariants.
Security angle
The supply-conservation invariant: the test that would have caught most real minting incidents.
Assessment
Test suite and simulation running in CI.