Testing utilities

MockMCPServer and ExpectedCall define a controlled protocol interaction. Unexpected calls raise MockExpectationError; invalid mock protocol behavior raises MockProtocolError.

Recording and RecordedInteraction capture reusable interactions. ReplayServer replays them and raises ReplayMismatch when a request differs. RecordedArtifact and ArtifactIntegrityError protect recorded artifact identity.

FaultInjector, Gate, and VirtualClock control failure and timing behavior in deterministic tests. RedactionBinding defines redaction applied to a recording.

snapshot(value, options=SnapshotOptions(...)) creates stable snapshot data for supported public values. Review snapshots as test artifacts; do not use them to avoid meaningful field assertions.