Files
deepseek-harness/packages/client/connection/tests/fake-api.ts
T

195 lines
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TypeScript

// Test-local programmable IApiClient fake (NOT the fixture: fixture is a demo
// data source on a real clock; behavior tests need per-case responses and
// deferred-controlled timing). Streams are hand pumps: pushMux/pushHost.
import type {
CommandDescriptor, CommandExecuteResult, HostFrame, IApiClient, MuxFrame,
RpcRequest, RpcResponse, SessionId, SkillEntry,
} from '../src/client/api.ts'
import { RpcId } from '../src/client/api.ts'
export interface Deferred<T> {
promise: Promise<T>
resolve(value: T): void
reject(error: unknown): void
}
/** Test-held settlement: the case decides when an RPC lands (history-pending injections etc.). */
export function deferred<T>(): Deferred<T> {
let resolve!: (value: T) => void
let reject!: (error: unknown) => void
const promise = new Promise<T>((res, rej) => {
resolve = res
reject = rej
})
return { promise, resolve, reject }
}
let nextRpc = 0
export function ok<T>(value: T): RpcResponse<T> {
return { rpcId: RpcId(`fake-${nextRpc++}`), result: { ok: true, value } }
}
type StreamItem<F> = { kind: 'frame'; envelope: RpcRequest<F> } | { kind: 'end' } | { kind: 'fail'; error: unknown }
interface StreamConn<F> {
feed(item: StreamItem<F>): void
}
export class FakeApiClient implements IApiClient {
/** Chronological call record: [method, payload]. */
readonly calls: { method: string; payload: unknown }[] = []
// Programmable slots (defaults answer OK-empty); reassign per case.
onList: (payload: unknown) => Promise<RpcResponse<{ items: never[] }>> = () => Promise.resolve(ok({ items: [] }))
onCreate: (payload: unknown) => Promise<RpcResponse<{ sessionId: SessionId }>> = () => Promise.resolve(ok({ sessionId: 'fk-new' as SessionId }))
onHistory: (payload: { sessionId: SessionId; beforeSeq?: number; maxMessages?: number })
=> Promise<RpcResponse<{ events: never[]; hasMore: boolean }>> =
() => Promise.resolve(ok({ events: [], hasMore: false }))
onPrompt: (payload: unknown) => Promise<RpcResponse<{ accepted: true }>> = () => Promise.resolve(ok({ accepted: true as const }))
onCancel: (payload: unknown) => Promise<RpcResponse<{ accepted: true }>> = () => Promise.resolve(ok({ accepted: true as const }))
onDescribe: (payload: unknown) => Promise<RpcResponse<{ version: string; cwd: string; attachedSessions: number }>> =
() => Promise.resolve(ok({ version: '0-fake', cwd: '/f', attachedSessions: 0 }))
private readonly muxConns: StreamConn<MuxFrame>[] = []
private readonly hostConns: StreamConn<HostFrame>[] = []
// Parameter annotations below are local structural types on purpose: the CI
// lint lane runs without built artifacts, where IApiClient's wire types
// (apiproxy subpath) resolve to any and inferred params trip no-unsafe-argument.
readonly sessions: IApiClient['sessions'] = {
list: (payload: unknown) => this.record('session.list', payload, this.onList(payload)),
create: (payload: unknown) => this.record('session.create', payload, this.onCreate(payload)),
history: (payload: { sessionId: SessionId; beforeSeq?: number; maxMessages?: number }) =>
this.record('session.history', payload, this.onHistory(payload)),
prompt: (payload: unknown) => this.record('session.prompt', payload, this.onPrompt(payload)),
cancel: (payload: unknown) => this.record('session.cancel', payload, this.onCancel(payload)),
}
readonly host: IApiClient['host'] = {
describe: payload => this.record('host.describe', payload, this.onDescribe(payload)),
}
readonly workspace: IApiClient['workspace'] = {
list: (payload: unknown) => this.record('workspace.list', payload, Promise.resolve(ok({ items: [] }))),
create: (payload: unknown) => this.record('workspace.create', payload, Promise.resolve(ok({
workspace: { workspaceId: 'fk-ws' as never, path: '/f/ws', title: 'ws', sessionIds: [], createdAt: '0', updatedAt: '0' },
created: true,
}))),
rename: (payload: unknown) => this.record('workspace.rename', payload, Promise.resolve(ok({
workspace: { workspaceId: 'fk-ws' as never, path: '/f/ws', title: 'ws', sessionIds: [], createdAt: '0', updatedAt: '0' },
}))),
delete: (payload: unknown) => this.record('workspace.delete', payload, Promise.resolve(ok({ deleted: true as const }))),
insertSessionBefore: (payload: unknown) => this.record('workspace.insertSessionBefore', payload, Promise.resolve(ok({
workspace: { workspaceId: 'fk-ws' as never, path: '/f/ws', title: 'ws', sessionIds: [], createdAt: '0', updatedAt: '0' },
}))),
}
// Payloads stay `unknown` (lint-lane note above); response rows are the real
// wire shapes so cases can program catalogs and skill lists without casts.
onCommandList: (payload: unknown) => Promise<RpcResponse<{ commands: CommandDescriptor[] }>>
= () => Promise.resolve(ok({ commands: [] }))
onCommandExecute: (payload: unknown) => Promise<RpcResponse<{ matched: boolean; result?: CommandExecuteResult }>>
= () => Promise.resolve(ok({ matched: false }))
onSkillList: (payload: unknown) => Promise<RpcResponse<{ skills: SkillEntry[] }>>
= () => Promise.resolve(ok({ skills: [] }))
readonly commands: IApiClient['commands'] = {
list: (payload: unknown) => this.record('command.list', payload, this.onCommandList(payload)),
execute: (payload: unknown) => this.record('command.execute', payload, this.onCommandExecute(payload)),
}
readonly skills: IApiClient['skills'] = {
list: (payload: unknown) => this.record('skill.list', payload, this.onSkillList(payload)),
}
/** When true, streams never fire onOpen (misbehaving-carrier material for the handshake timeout guard). */
suppressStreamOpen = false
/** When true, onOpen callbacks are parked instead of fired; releaseStreamOpens() fires them.
* Lets a case hold the readiness handshake open (describe done, streams not yet "established"). */
holdStreamOpen = false
private heldOpens: (() => void)[] = []
releaseStreamOpens(): void {
const held = this.heldOpens
this.heldOpens = []
for (const fire of held) fire()
}
readonly events: IApiClient['events'] = {
mux: (_payload: unknown, signal: AbortSignal, onOpen?: () => void) =>
this.openStream(this.muxConns, signal, onOpen),
host: (_payload: unknown, signal: AbortSignal, onOpen?: () => void) =>
this.openStream(this.hostConns, signal, onOpen),
}
respond(): Promise<{ accepted: false; reason: 'not-pending' }> {
return Promise.resolve({ accepted: false, reason: 'not-pending' })
}
/** Push one mux frame to every open mux stream (rpcId minted unless pinned by the case). */
pushMux(frame: MuxFrame, rpcId?: string): void {
for (const conn of [...this.muxConns]) conn.feed({ kind: 'frame', envelope: { rpcId: RpcId(rpcId ?? `push-${nextRpc++}`), payload: frame } })
}
pushHost(frame: HostFrame, rpcId?: string): void {
for (const conn of [...this.hostConns]) conn.feed({ kind: 'frame', envelope: { rpcId: RpcId(rpcId ?? `push-${nextRpc++}`), payload: frame } })
}
/** End (clean close) or fail (throw) every open stream — reconnect-path material. */
endStreams(): void {
for (const conn of [...this.muxConns, ...this.hostConns]) conn.feed({ kind: 'end' })
}
failStreams(error: unknown): void {
for (const conn of [...this.muxConns, ...this.hostConns]) conn.feed({ kind: 'fail', error })
}
get openMuxCount(): number {
return this.muxConns.length
}
callsOf(method: string): unknown[] {
return this.calls.filter(c => c.method === method).map(c => c.payload)
}
private record<T>(method: string, payload: unknown, response: Promise<T>): Promise<T> {
this.calls.push({ method, payload })
return response
}
private async *openStream<F>(registry: StreamConn<F>[], signal: AbortSignal, onOpen?: () => void): AsyncGenerator<RpcRequest<F>> {
const inbox: StreamItem<F>[] = []
let wake: (() => void) | null = null
const conn: StreamConn<F> = {
feed: (item) => {
inbox.push(item)
wake?.()
},
}
registry.push(conn)
if (this.holdStreamOpen && onOpen !== undefined) this.heldOpens.push(onOpen)
else if (!this.suppressStreamOpen) onOpen?.()
try {
while (!signal.aborted) {
while (inbox.length > 0) {
const item = inbox.shift() as StreamItem<F>
if (item.kind === 'end') return
if (item.kind === 'fail') throw item.error
yield item.envelope
}
await new Promise<void>((resolve) => {
wake = resolve
signal.addEventListener('abort', () => { resolve() }, { once: true })
})
wake = null
}
} finally {
registry.splice(registry.indexOf(conn), 1)
}
}
}