mirror of
https://github.com/deepseek-ai/deepseek-harness
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278 lines
12 KiB
TypeScript
278 lines
12 KiB
TypeScript
/**
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* Tests for the spill-policy PLUGIN. It registers no service, only the
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* `tools/post-execute` transformer. We drive real tools through
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* `ctx.tools.execute(...)` and assert: disabled mode is a true no-op, an
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* oversized plain-text result is spilled and replaced with a preview + locator,
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* a small result and a non-text result pass through, `read` is skipped, and a
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* `saveText` failure / missing backend / missing owner all preserve the original
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* result without an `isError`.
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*/
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import { describe, expect, it, vi } from 'vitest'
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import { Context } from 'cordis'
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import Loader from '@cordisjs/plugin-loader'
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import { CallId } from '@deepseek-ai/dsh-llm'
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import type { ContentBlock } from '@deepseek-ai/dsh-llm'
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import { SessionId } from '@deepseek-ai/dsh-session'
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import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
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import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools'
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import type { ToolExecution } from '@deepseek-ai/dsh-tools'
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import { SpillLocator, SpillStore } from '@deepseek-ai/dsh-spill'
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import type { SaveTextSpill, SpillRef } from '@deepseek-ai/dsh-spill'
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import * as SpillPolicy from '@deepseek-ai/dsh-spill-policy'
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/** A stub spill backend recording its saves; `fail` exercises the best-effort fallback. */
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class StubStore extends SpillStore {
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saves: SaveTextSpill[] = []
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fail = false
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async saveText(input: SaveTextSpill): Promise<SpillRef> {
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if (this.fail) throw new Error('disk full')
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this.saves.push(input)
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return {
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locator: SpillLocator(`/spill/${input.suggestedName}`),
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bytes: Buffer.byteLength(input.content, 'utf8'),
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retrievalHint: 'Use the stub retrieval path.',
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}
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}
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}
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/** A tool returning `text` verbatim (name configurable so we can register `read`). */
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function textTool(name: string, text: string) {
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return defineTool({
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name,
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description: name,
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parameters: {},
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async execute(): Promise<ContentBlock[]> { return [{ type: 'text', text }] },
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})
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}
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/** A minimal exec carrying a session header id (the spill owner). */
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function exec(name: string, session = 's1'): ToolExecution {
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// Only agent.session.header.id is read by the policy; a structural stub suffices.
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const agent = { session: { header: { id: SessionId(session) } } }
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return { callId: CallId(`call-${name}`), name, arguments: {}, agent } as unknown as ToolExecution
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}
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/**
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* Build a context with tools + the policy, and optionally a spill backend.
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* Returns the context and the backend handle (undefined when `withSpill` false).
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*/
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async function setup(config: SpillPolicy.Config, withSpill = true): Promise<{ ctx: Context; spill?: StubStore; fiber: Awaited<ReturnType<Context['plugin']>> }> {
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const ctx = new Context()
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await ctx.plugin(SystemPrompt)
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await ctx.plugin(ToolRegistry)
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let spill: StubStore | undefined
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if (withSpill) {
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await ctx.plugin(StubStore)
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spill = ctx.spillStore as StubStore
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}
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const fiber = await ctx.plugin(SpillPolicy, config)
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return { ctx, fiber, ...spill ? { spill } : {} }
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}
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/** Flatten a result's text blocks. */
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function textOf(content: ContentBlock[]): string {
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return content.filter((b): b is Extract<ContentBlock, { type: 'text' }> => b.type === 'text').map(b => b.text).join('')
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}
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describe('disabled mode', () => {
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it('registers no post-execute listener when maxInlineBytes is omitted', async () => {
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const { ctx, spill } = await setup({})
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ctx.tools.register(textTool('big', 'x'.repeat(1000)))
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const result = await ctx.tools.execute(exec('big'))
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expect(textOf(result.content)).toBe('x'.repeat(1000))
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expect(result.isError).toBe(false)
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expect(spill?.saves).toHaveLength(0)
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})
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})
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describe('loader export shape', () => {
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it('has no default export and keeps name/inject/Config through unwrapExports', () => {
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expect('default' in SpillPolicy).toBe(false)
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const loader = Object.create(Loader.prototype) as Loader
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const unwrapped = loader.unwrapExports(SpillPolicy) as Record<string, unknown>
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expect(unwrapped).toBe(SpillPolicy)
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expect(unwrapped.name).toBe('spill-policy')
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expect(unwrapped.inject).toEqual(['tools'])
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expect(unwrapped.Config).toBeDefined()
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expect(typeof unwrapped.apply).toBe('function')
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})
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})
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describe('config validation', () => {
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it('rejects a negative maxInlineBytes at load', async () => {
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await expect(setup({ maxInlineBytes: -1 })).rejects.toThrow(/non-negative integer/)
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})
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it('rejects a fractional maxInlineBytes at load', async () => {
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await expect(setup({ maxInlineBytes: 1.5 })).rejects.toThrow(/non-negative integer/)
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})
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})
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describe('oversized plain-text replacement', () => {
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it('spills the full text and replaces the result with a preview + locator within the cap', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 200 })
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const body = 'HEAD'.repeat(200) + 'TAIL'.repeat(200) // 1600 bytes > 200
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ctx.tools.register(textTool('big', body))
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const result = await ctx.tools.execute(exec('big'))
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expect(result.isError).toBe(false)
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expect(spill?.saves).toHaveLength(1)
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expect(spill?.saves[0]?.content).toBe(body)
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expect(spill?.saves[0]?.source.toolName).toBe('big')
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expect(spill?.saves[0]?.suggestedName).toBe('big.txt')
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expect(spill?.saves[0]?.owner.sessionId).toBe('s1')
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const text = textOf(result.content)
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expect(text).not.toBe(body)
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expect(text.startsWith('HEAD')).toBe(true)
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expect(text).toContain('Full formatted result stored at: /spill/big.txt')
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expect(text).toContain('Use the stub retrieval path.')
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expect(text).toContain('Omitted')
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// The replacement (preview + blank line + notice) stays within the cap and
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// is smaller than the original — the whole point of spilling.
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expect(Buffer.byteLength(text, 'utf8')).toBeLessThanOrEqual(200)
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expect(Buffer.byteLength(text, 'utf8')).toBeLessThan(body.length)
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})
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it('keeps the inline result when the notice-only replacement would exceed the cap', async () => {
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// A body just over a tiny cap: the notice alone is larger than the cap, so
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// there is no within-cap replacement — the policy keeps the inline result.
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const { ctx } = await setup({ maxInlineBytes: 4 })
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const warn = vi.spyOn(ctx.logger, 'warn').mockImplementation(() => {})
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const body = 'xxxxx' // 5 bytes > 4, but far shorter than the notice
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ctx.tools.register(textTool('big', body))
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const result = await ctx.tools.execute(exec('big'))
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expect(textOf(result.content)).toBe(body)
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expect(warn).toHaveBeenCalled()
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})
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it('leaves a small plain-text result unchanged', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 1000 })
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ctx.tools.register(textTool('small', 'tiny'))
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const result = await ctx.tools.execute(exec('small'))
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expect(textOf(result.content)).toBe('tiny')
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expect(spill?.saves).toHaveLength(0)
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})
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it('leaves a result with a non-text block unchanged', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 5 })
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ctx.tools.register(defineTool({
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name: 'mixed',
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description: 'mixed',
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parameters: {},
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async execute(): Promise<ContentBlock[]> {
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return [{ type: 'text', text: 'x'.repeat(100) }, { type: 'reasoning', text: 'why' }]
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},
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}))
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const result = await ctx.tools.execute(exec('mixed'))
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expect(spill?.saves).toHaveLength(0)
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expect(result.content).toHaveLength(2)
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})
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})
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describe('read skip', () => {
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it('never spills the read tool result (avoids a read → spill → read loop)', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 10 })
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ctx.tools.register(textTool('read', 'x'.repeat(1000)))
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const result = await ctx.tools.execute(exec('read'))
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expect(textOf(result.content)).toBe('x'.repeat(1000))
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expect(spill?.saves).toHaveLength(0)
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})
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})
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describe('best-effort fallback', () => {
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it('keeps the original result when saveText fails', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 10 })
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spill!.fail = true
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const warn = vi.spyOn(ctx.logger, 'warn').mockImplementation(() => {})
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ctx.tools.register(textTool('big', 'x'.repeat(1000)))
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const result = await ctx.tools.execute(exec('big'))
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expect(textOf(result.content)).toBe('x'.repeat(1000))
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expect(result.isError).toBe(false)
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expect(warn).toHaveBeenCalled()
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})
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it('keeps the original result when no spill backend is loaded', async () => {
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const { ctx } = await setup({ maxInlineBytes: 10 }, false)
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const warn = vi.spyOn(ctx.logger, 'warn').mockImplementation(() => {})
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ctx.tools.register(textTool('big', 'x'.repeat(1000)))
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const result = await ctx.tools.execute(exec('big'))
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expect(textOf(result.content)).toBe('x'.repeat(1000))
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expect(warn).toHaveBeenCalled()
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})
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it('keeps the original result when the call has no session owner', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 10 })
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const warn = vi.spyOn(ctx.logger, 'warn').mockImplementation(() => {})
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ctx.tools.register(textTool('big', 'x'.repeat(1000)))
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const result = await ctx.tools.execute({ callId: CallId('c'), name: 'big', arguments: {} })
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expect(textOf(result.content)).toBe('x'.repeat(1000))
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expect(spill?.saves).toHaveLength(0)
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expect(warn).toHaveBeenCalled()
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})
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})
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describe('composition', () => {
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it('bounds content a downstream post-execute listener replaced', async () => {
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const { ctx, spill } = await setup({ maxInlineBytes: 200 })
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// A later-registered listener replaces the (small) tool result with a big one;
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// the policy delegated via next(), so it bounds the replacement.
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ctx.on('tools/post-execute', async (_e, _r, _next) =>
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({ kind: 'accept', content: [{ type: 'text', text: 'z'.repeat(500) }] }))
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ctx.tools.register(textTool('small', 'tiny'))
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const result = await ctx.tools.execute(exec('small'))
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expect(spill?.saves[0]?.content).toBe('z'.repeat(500))
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expect(textOf(result.content)).toContain('Full formatted result stored at')
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})
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it('preserves downstream accept-decision contexts when spilling', async () => {
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const { ctx } = await setup({ maxInlineBytes: 200 })
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const context = { content: [{ type: 'text' as const, text: 'note' }], source: { kind: 'plugin' as const, plugin: 'test' } }
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ctx.on('tools/post-execute', async (_e, _r, _next) =>
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({ kind: 'accept', additionalContexts: [context] }))
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ctx.tools.register(textTool('big', 'x'.repeat(1000)))
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const result = await ctx.tools.execute(exec('big'))
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expect(textOf(result.content)).toContain('Full formatted result stored at')
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expect(result.additionalContexts).toEqual([context])
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})
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})
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describe('cap invariant', () => {
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it('keeps the inline result when the notice alone exceeds the cap, even for a large original', async () => {
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// A large body (so it is well over the cap) but a cap smaller than the
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// notice itself: there is no within-cap replacement, so the policy must keep
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// the inline result rather than emit content over maxInlineBytes.
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const { ctx } = await setup({ maxInlineBytes: 8 })
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const warn = vi.spyOn(ctx.logger, 'warn').mockImplementation(() => {})
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const body = 'x'.repeat(5000)
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ctx.tools.register(textTool('big', body))
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const result = await ctx.tools.execute(exec('big'))
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expect(textOf(result.content)).toBe(body)
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expect(warn).toHaveBeenCalled()
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})
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})
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describe('disposal (HMR safety)', () => {
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it('stops transforming oversized results after the plugin fiber is disposed', async () => {
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const { ctx, spill, fiber } = await setup({ maxInlineBytes: 200 })
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const body = 'HEAD'.repeat(200) + 'TAIL'.repeat(200)
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ctx.tools.register(textTool('big', body))
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// Live: the listener spills and replaces.
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const before = await ctx.tools.execute(exec('big'))
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expect(textOf(before.content)).toContain('Full formatted result stored at')
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expect(spill?.saves).toHaveLength(1)
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// After disposal the listener is gone — the result passes through untouched
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// and nothing more is spilled (no leaked registration across reload).
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await fiber.dispose()
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const after = await ctx.tools.execute(exec('big'))
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expect(textOf(after.content)).toBe(body)
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expect(spill?.saves).toHaveLength(1)
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})
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})
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