logos-blockchain-testing/book/src/part-iii.md

Part III — Scenario Runtime

These chapters describe what happens while a scenario runs: traffic, verification, capabilities, and observation.

The same runtime serves all three declarative entry patterns: uniform clusters, composed app stacks, and attached external nodes.

• Workloads and Concurrency — driving the system under test
• Expectations and Evaluation — verifying outcomes
• The Verb Layer — concise domain actions over the explicit builder API
• Scenario Capabilities — capability-gated features such as node control
• Chaos and Controlled Failure — restarts and failover from workloads
• Runtime Extensions — typed scenario-lifetime services
• Continuous Observation — snapshots, history, and event streams for test logic
• Telemetry and External Observability — metrics, logs, and tracing