|
Foundational helpers referenced by most subsequent code. Small, pure,
no dependencies on anything in the project.
utils/result.ts Result<T, E> = Ok<T> | Err<E> for recoverable
failures at system boundaries (save/load, manifest
fetch, content validation). Internal pure logic
still uses throw for programmer errors.
ok / err / isOk / isErr / mapResult / mapErr /
unwrap / unwrapOr.
utils/assert.ts assert (with type-narrowing asserts), assertNever
for exhaustive-switch termination, assertDefined
for narrowing T | null | undefined → T.
utils/equal.ts Structural deepEqual for tests comparing simulation
snapshots. Handles plain objects, arrays, Map, Set,
Date, primitives. Does not handle cyclic graphs
(simulation state is a tree).
utils/types.ts Common type aliases: NonEmptyArray, JsonValue,
ElementOf, DeepReadonly, Brand<T, B> for nominal /
branded types (PersonId vs RelationshipId).
utils/log.ts Structured logging wrapping console. Developer-
facing only; the game ships with no runtime
telemetry.
utils/index.ts Public re-exports.
40 unit tests in tests/unit/utils/ cover Result constructors and
combinators, assert variants, and deepEqual's primitive / array /
object / Map / Set / Date paths plus a realistic simulation-snapshot
comparison.
|
