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refactor(session): rename the seed boundary to end-seed

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Hypatia May
2026-07-30 15:32:06 +08:00
parent e8f0934bc2
commit 8527137230
44 changed files with 228 additions and 224 deletions
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12
packages/core/session/tests/fork.spec.ts
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@@ -52,11 +52,11 @@ function lastSeq(session: Session): number {
return event.seq
}
/** A seeded child's inherited prefix: its log minus the constructor's boundary. */
/** A seeded child's constructor seed: its log minus the end-seed marker. */
function inherited(session: Session): readonly SessionEvent[] {
const events = session.events
const last = events.at(-1)
if (last?.type !== 'session/inherited') throw new Error('seeded child is missing its inherited boundary')
if (last?.type !== 'session/end-seed') throw new Error('seeded child is missing its end-seed marker')
return events.slice(0, -1)
}
@@ -166,12 +166,12 @@ describe('SessionStore.fork', () => {
const child = sessions.fork(parent, undefined, SessionId('bracket-child'))
// Parent: nothing above the bracket, so its owner must treat it as live.
// Parent: no end-seed event follows the bracket, so its owner treats it as live.
expect(parent.events.at(-1)).toBe(open)
expect(parent.events.some(event => event.type === 'session/inherited')).toBe(false)
// Child: the same bracket sits below its boundary, so it is dead history.
expect(parent.events.some(event => event.type === 'session/end-seed')).toBe(false)
// Child: the same bracket is before end-seed, so it belongs to the seed.
const boundary = child.events.at(-1)
expect(boundary).toMatchObject({ type: 'session/inherited' })
expect(boundary).toMatchObject({ type: 'session/end-seed' })
expect(boundary!.seq).toBeGreaterThan(open.seq)
expect(child.firstLiveSeq).toBe(open.seq + 1)
expect(inherited(child).at(-1)).toMatchObject({ type: 'test/bracket-open', data: { id: 'op-1' } })