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Status codes, ProblemDetails, validation, pagination, idempotency, cancellation, health, and release-safe smoke contracts.
Practice items tagged with API Contract Testing.
Checks health, authentication, and one critical read flow after deployment without creating persistent business data.
Builds a bounded readiness check for one required dependency while keeping liveness independent and responses non-sensitive.
Uses two isolated EF Core contexts to reproduce a real optimistic-concurrency conflict through the API boundary.
Proves repeated requests with one idempotency key create one resource and return a consistent result.
Combines schema diffing, real provider tests, consumer expectations, generated clients, semantic scenarios, and rollout evidence to prevent accidental API breaks.
Uses a controllable fake HTTP handler to prove request cancellation reaches a downstream dependency.