Module id_provider 

Identifier source, injected so tests get a deterministic — but still unique — id sequence.

Production wires UuidProvider (Uuid::new_v4().to_string()); tests construct a SequentialIdProvider and pass it to the unit under test.

Each new_id() call yields a fresh, distinct id. Per-entity uniqueness is preserved: a loop minting one id per row keeps producing distinct ids under both the production and the test provider.

Structs

SequentialIdProvider

Deterministic but unique: "{prefix}-0", "{prefix}-1", … Preserves the per-entity uniqueness invariant while being reproducible across runs.

UuidProvider

Production provider: random v4 UUIDs.

Traits

IdProvider

Identifier source. Yields a fresh unique id per call.

Type Aliases

IdRef

Shared handle to an id provider. Held by Clone types that need to share one id source, so they clone the handle, not the implementation.