50 lines
2.3 KiB
TypeScript
50 lines
2.3 KiB
TypeScript
/**
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* Behavioral half of the compaction-checkpoint drift trap.
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*
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* `TranscriptAdapter` pins its plugin literal to the seam's own declaration at
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* compile time through a type-only import of `dsh-compact/checkpoint`, so
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* renaming the seam's plugin already fails `tsc`. This spec covers the same
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* drift from the other side — end to end through the adapter, driving it with a
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* checkpoint built from the canonical `COMPACT_CHECKPOINT_SOURCE` value and
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* checking the seam's own predicate agrees. Both values come from the
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* cordis-free checkpoint leaf, so the client test program never loads the host
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* package root or its `Context` merges.
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*/
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import { COMPACT_CHECKPOINT_SOURCE, isCompactCheckpointSource } from '@deepseek-ai/dsh-compact/checkpoint'
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import { createUserMessage } from '@deepseek-ai/dsh-llm'
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import { describe, expect, it } from 'vitest'
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import type { SessionEvent } from '@deepseek-ai/dsh-session/types'
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import { TranscriptAdapter } from '../src/client/sessions/transcript-adapter.ts'
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/** A replacement user message stamped with the seam's own canonical source. */
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function canonicalCheckpoint(seq: number): SessionEvent {
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return {
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type: 'user/message',
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seq,
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time: 1_700_000_000_000 + seq,
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surfaceOp: { op: 'replace', start: 0, end: 0 },
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sourceEventSeqs: [0],
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data: createUserMessage({
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content: [{ type: 'text', text: '<context_checkpoint>model only</context_checkpoint>' }],
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source: COMPACT_CHECKPOINT_SOURCE,
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}),
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} as unknown as SessionEvent
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}
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describe('compaction checkpoint recognition', () => {
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it('recognizes a checkpoint carrying the seam-canonical source', () => {
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const adapter = new TranscriptAdapter()
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adapter.reset([canonicalCheckpoint(1)])
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expect(adapter.nodes()).toEqual([{ kind: 'compaction', seq: 1, time: 1_700_000_000_001, summary: null }])
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})
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it("agrees with the seam's own predicate on the source it recognizes", () => {
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// Both sides answer the same question about the same value: if the seam
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// renames its plugin, this equality is what breaks.
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const checkpoint = canonicalCheckpoint(1)
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expect(checkpoint.type === 'user/message' && isCompactCheckpointSource(checkpoint.data.source)).toBe(true)
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expect(COMPACT_CHECKPOINT_SOURCE).toEqual({ kind: 'plugin', plugin: 'compact' })
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})
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})
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