chore: establish YCode replication baseline and TODO

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xiaohan.yuan committed 2026-10-17 02:43:49 +08:00
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import assert from 'node:assert/strict'
import { testTerminalHostPlugin } from './test-terminal-host-plugin'
import { mkdir, mkdtemp, readFile, rm } from 'node:fs/promises'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { pathToFileURL } from 'node:url'
import { build } from 'esbuild'
import type { ChatMessage } from '../src/shared/types'
interface PersistenceTestState {
userData: string
handlers: Map<string, (...args: unknown[]) => unknown>
promptCalls: number
abortCalls: number
cancelOutputEmitted: boolean
useOmp: boolean
fallbackHistory: ChatMessage[] | null
}
const TEST_STATE_KEY = '__YCODE_CHAT_PERSISTENCE_TEST__'
function wait(ms: number): Promise<void> {
return new Promise((resolve) => setTimeout(resolve, ms))
}
async function waitForMessages(
invoke: (channel: string, ...args: unknown[]) => Promise<unknown>,
sessionId: string,
done: (messages: ChatMessage[]) => boolean
): Promise<ChatMessage[]> {
for (let attempt = 0; attempt < 100; attempt++) {
const messages = (await invoke('session:messages', sessionId)) as ChatMessage[]
if (done(messages)) return messages
await wait(10)
}
const last = (await invoke('session:messages', sessionId)) as ChatMessage[]
assert.fail(`Timed out waiting for persisted messages: ${JSON.stringify(last)}`)
}
async function readDiskMessages(userData: string, sessionId: string): Promise<ChatMessage[]> {
const stored = JSON.parse(await readFile(join(userData, 'sessions.json'), 'utf8')) as {
sessions: Array<{ id: string; messages: ChatMessage[] }>
}
return stored.sessions.find((item) => item.id === sessionId)?.messages ?? []
}
async function waitForDiskAssistant(
userData: string,
sessionId: string,
matches: (message: ChatMessage) => boolean
): Promise<ChatMessage> {
for (let attempt = 0; attempt < 100; attempt++) {
const message = (await readDiskMessages(userData, sessionId)).findLast((entry) => entry.role === 'assistant')
if (message && matches(message)) return message
await wait(10)
}
const messages = await readDiskMessages(userData, sessionId)
assert.fail(`Timed out waiting for assistant checkpoint: ${JSON.stringify(messages.at(-1))}`)
}
function assistant(messages: ChatMessage[]): ChatMessage {
const result = messages.findLast((message) => message.role === 'assistant')
assert.ok(result, 'session should contain an assistant message')
return result
}
async function main(): Promise<void> {
const tempRoot = await mkdtemp(join(tmpdir(), 'ycode-chat-persistence-'))
const state: PersistenceTestState = {
userData: join(tempRoot, 'userData'),
handlers: new Map(),
promptCalls: 0,
abortCalls: 0,
cancelOutputEmitted: false,
useOmp: true,
fallbackHistory: null
}
await mkdir(state.userData, { recursive: true })
const globals = globalThis as typeof globalThis & Record<string, unknown>
const previousState = globals[TEST_STATE_KEY]
globals[TEST_STATE_KEY] = state
try {
const ipcEntry = join(process.cwd(), 'src', 'main', 'ipc.ts')
const sessionsEntry = join(process.cwd(), 'src', 'main', 'sessions.ts')
const outfile = join(tempRoot, 'ipc-chat-persistence.mjs')
await build({
stdin: {
contents: `export { registerIpc } from ${JSON.stringify(ipcEntry)};\nexport * as sessions from ${JSON.stringify(sessionsEntry)};`,
resolveDir: process.cwd(),
sourcefile: 'chat-persistence-regression-entry.ts',
loader: 'ts'
},
outfile,
bundle: true,
external: ['node-pty'],
platform: 'node',
format: 'esm',
banner: { js: "import { createRequire as createIpcTestRequire } from 'node:module'; const require = createIpcTestRequire(import.meta.url);" },
logLevel: 'silent',
plugins: [
testTerminalHostPlugin,
{
name: 'chat-persistence-mocks',
setup(pluginBuild) {
pluginBuild.onResolve({ filter: /^electron$/ }, () => ({ path: 'electron', namespace: 'mock-electron' }))
pluginBuild.onLoad({ filter: /.*/, namespace: 'mock-electron' }, () => ({
loader: 'js',
contents: `
const state = globalThis.${TEST_STATE_KEY};
export const app = {
getPath: (name) => name === 'userData' ? state.userData : state.userData,
getName: () => 'YCode',
getVersion: () => '0.1.0'
};
export const safeStorage = {
isEncryptionAvailable: () => false,
encryptString: (value) => Buffer.from(value),
decryptString: (value) => value.toString()
};
export const ipcMain = {
handle: (name, handler) => state.handlers.set(name, handler)
};
export const dialog = { showOpenDialog: async () => ({ canceled: true, filePaths: [] }) };
export const shell = { openPath: async () => '' };
export class BrowserWindow {}
export class WebContentsView {}
`
}))
pluginBuild.onResolve({ filter: /^\.\/omp$/ }, () => ({ path: 'omp', namespace: 'mock-omp' }))
pluginBuild.onLoad({ filter: /.*/, namespace: 'mock-omp' }, () => ({
loader: 'js',
contents: `
import { EventEmitter } from 'node:events';
const state = globalThis.${TEST_STATE_KEY};
const toolId = 'persisted-tool';
const fullOutput = '${'long-output-'.repeat(60)}PERSISTED-OUTPUT-SENTINEL';
const emit = (kernel, frame) => kernel.emit('event', frame);
export class OmpKernel extends EventEmitter {
constructor() { super(); }
setHostTools() { return Promise.resolve({ type: 'response', success: true, data: { toolNames: [] } }); }
send() { return Promise.resolve({ type: 'response', success: true, data: { messages: [] } }); }
prompt(message) {
state.promptCalls++;
if (message.split('\\n', 1)[0] === 'persist-cancel') {
setImmediate(() => {
emit(this, { type: 'message_update', assistantMessageEvent: { type: 'text_delta', delta: 'cancel-before' } });
emit(this, { type: 'tool_execution_start', toolCall: { id: toolId, name: 'shell', args: { command: 'long-running' } } });
emit(this, { type: 'tool_execution_update', toolCall: { id: toolId, partialResult: 'cancelled tool output retained' } });
state.cancelOutputEmitted = true;
});
} else {
setImmediate(() => {
emit(this, { type: 'message_update', assistantMessageEvent: { type: 'text_delta', delta: 'before' } });
emit(this, { type: 'tool_execution_start', toolCall: { id: toolId, name: 'read_file', args: { path: 'large.txt' } } });
emit(this, { type: 'tool_execution_update', toolCall: { id: toolId, partialResult: fullOutput } });
emit(this, { type: 'message_update', assistantMessageEvent: { type: 'text_delta', delta: 'after' } });
emit(this, { type: 'tool_execution_end', toolCall: { id: toolId, name: 'read_file', result: { content: [{ type: 'text', text: fullOutput }], isError: false }, success: true } });
emit(this, { type: 'agent_end', yielded: true });
});
}
return Promise.resolve({ type: 'response', success: true });
}
abort() {
state.abortCalls++;
setImmediate(() => emit(this, { type: 'agent_end', yielded: true }));
return Promise.resolve({ type: 'response', success: true });
}
dispose() {}
}
export const detectOmpPath = () => state.useOmp ? 'mock-omp' : null;
export const getOmpInfo = () => ({ available: true, exePath: 'mock-omp', profile: 'ycode', model: 'ycode/test' });
`
}))
pluginBuild.onResolve({ filter: /^\.\/agent\/loop$/ }, () => ({ path: 'agent-loop', namespace: 'mock-loop' }))
pluginBuild.onLoad({ filter: /.*/, namespace: 'mock-loop' }, () => ({
loader: 'js',
contents: `
const state = globalThis.${TEST_STATE_KEY};
export async function runTurn(options) {
state.fallbackHistory = options.history;
const content = 'fallback response';
options.emit({ runId: options.runId, type: 'text', delta: content });
options.emit({ runId: options.runId, type: 'done', content, tools: [] });
return { content, tools: [] };
}
`
}))
pluginBuild.onResolve({ filter: /^\.\/gateway$/ }, () => ({ path: 'gateway', namespace: 'mock-gateway' }))
pluginBuild.onLoad({ filter: /.*/, namespace: 'mock-gateway' }, () => ({
loader: 'js',
contents: 'export class Gateway { constructor() {} }'
}))
}
}
]
})
const ipc = await import(pathToFileURL(outfile).href)
;(ipc.registerIpc as (getWindow: () => unknown) => void)(() => ({
webContents: { send: () => undefined }
}))
const invoke = (channel: string, ...args: unknown[]): Promise<unknown> => {
const handler = state.handlers.get(channel)
if (!handler) throw new Error(`Missing IPC handler: ${channel}`)
return Promise.resolve(handler({}, ...args))
}
const normalSession = (await invoke('session:create', 'ordered persistence')) as { id: string }
await invoke('chat:send', { sessionId: normalSession.id, text: 'persist-order' })
const normalMessages = await waitForMessages(invoke, normalSession.id, (messages) => assistant(messages).status === 'done')
const renamedSession = ((await invoke('session:list')) as Array<{ id: string; title: string }>)
.find((entry) => entry.id === normalSession.id)
assert.equal(renamedSession?.title, 'persist-order', 'the first send should set the session title')
const normalAssistant = assistant(normalMessages)
const expectedParts = [
{ type: 'text', text: 'before' },
{ type: 'tool', toolId: 'persisted-tool' },
{ type: 'text', text: 'after' }
]
assert.deepEqual(normalAssistant.parts, expectedParts, 'session:messages should retain text/tool/text order')
assert.equal(normalAssistant.status, 'done')
assert.equal(normalAssistant.tools?.length, 1)
const normalTool = normalAssistant.tools?.[0]
assert.ok(normalTool, 'completed tool should be present')
assert.ok((normalTool.output?.length ?? 0) > 600, 'full tool output should exceed the summary limit')
assert.ok(normalTool.output?.endsWith('PERSISTED-OUTPUT-SENTINEL'), 'full tool output sentinel should be retained')
assert.ok((normalTool.summary?.length ?? Infinity) < (normalTool.output?.length ?? 0),
'the summary may be truncated while full output remains intact')
const diskNormalAssistant = assistant(await readDiskMessages(state.userData, normalSession.id))
assert.deepEqual(diskNormalAssistant.parts, expectedParts, 'disk JSON should retain text/tool/text order')
assert.ok((diskNormalAssistant.tools?.[0].output?.length ?? 0) > 600,
'disk JSON should retain output beyond the summary limit')
assert.equal(diskNormalAssistant.tools?.[0].output, normalTool.output,
'disk JSON should retain the complete tool output')
assert.ok(diskNormalAssistant.tools?.[0].output?.endsWith('PERSISTED-OUTPUT-SENTINEL'))
const fallbackSession = (await invoke('session:create', 'fallback history')) as { id: string }
const sessions = ipc.sessions as {
appendMessage(sessionId: string, message: ChatMessage): Promise<void>
}
await sessions.appendMessage(fallbackSession.id, {
id: 'fallback-user',
role: 'user',
content: 'old request',
createdAt: Date.now(),
status: 'done'
})
await sessions.appendMessage(fallbackSession.id, {
id: 'fallback-assistant',
role: 'assistant',
content: 'old answer',
parts: [{ type: 'text', text: 'old answer' }],
createdAt: Date.now(),
status: 'done'
})
state.useOmp = false
await invoke('chat:send', { sessionId: fallbackSession.id, text: 'fallback-history' })
const fallbackMessages = await waitForMessages(
invoke,
fallbackSession.id,
(messages) => assistant(messages).content === 'fallback response' && assistant(messages).status === 'done'
)
assert.equal(assistant(fallbackMessages).content, 'fallback response')
assert.deepEqual(state.fallbackHistory?.map((message) => message.content), ['old request', 'old answer'],
'the fallback loop should receive previously persisted user and assistant messages')
state.useOmp = true
const cancelSession = (await invoke('session:create', 'cancelled persistence')) as { id: string }
const cancelledSend = (await invoke('chat:send', {
sessionId: cancelSession.id,
text: 'persist-cancel'
})) as { runId: string }
for (let attempt = 0; attempt < 100 && !state.cancelOutputEmitted; attempt++) await wait(10)
assert.equal(state.cancelOutputEmitted, true, 'fake OMP should emit a running tool and partial output')
const streamingCheckpoint = await waitForDiskAssistant(state.userData, cancelSession.id, (message) =>
message.status === 'streaming' &&
message.content === 'cancel-before' &&
message.tools?.[0].status === 'running' &&
message.tools?.[0].output === 'cancelled tool output retained'
)
assert.deepEqual(streamingCheckpoint.parts, [
{ type: 'text', text: 'cancel-before' },
{ type: 'tool', toolId: 'persisted-tool' }
], 'the streaming checkpoint should persist text/tool order before cancellation')
const cancelResult = (await invoke('chat:cancel', cancelledSend.runId)) as { cancelled: boolean }
assert.equal(cancelResult.cancelled, true)
const cancelledMessages = await waitForMessages(
invoke,
cancelSession.id,
(messages) => assistant(messages).status === 'cancelled'
)
const cancelledAssistant = assistant(cancelledMessages)
assert.deepEqual(cancelledAssistant.parts, [
{ type: 'text', text: 'cancel-before' },
{ type: 'tool', toolId: 'persisted-tool' }
])
assert.equal(cancelledAssistant.status, 'cancelled')
assert.equal(cancelledAssistant.tools?.[0].status, 'cancelled')
assert.equal(cancelledAssistant.tools?.[0].output, 'cancelled tool output retained')
const diskCancelledAssistant = assistant(await readDiskMessages(state.userData, cancelSession.id))
assert.equal(diskCancelledAssistant.status, 'cancelled', 'disk JSON should persist the assistant cancellation')
assert.equal(diskCancelledAssistant.tools?.[0].status, 'cancelled', 'disk JSON should persist terminal tool status')
assert.equal(diskCancelledAssistant.tools?.[0].output, 'cancelled tool output retained',
'disk JSON should preserve output from a running tool cancelled mid-turn')
assert.equal(state.promptCalls, 2)
assert.equal(state.abortCalls, 1)
console.log('chat-persistence-regression: all checks passed')
} finally {
globals[TEST_STATE_KEY] = previousState
await rm(tempRoot, { recursive: true, force: true })
}
}
void main().catch((error: unknown) => {
console.error('chat-persistence-regression failed:', error)
process.exitCode = 1
})