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openchamber/packages/ui/src/sync/user-message-history.test.ts
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TypeScript

import { describe, expect, test } from 'bun:test';
import type { Message, Part } from '@opencode-ai/sdk/v2/client';
import type { State } from './types';
import { EMPTY_USER_MESSAGE_HISTORY_SNAPSHOT, buildUserMessageHistorySnapshot } from './user-message-history';
const message = (id: string, role: 'user' | 'assistant'): Message => ({
id,
role,
sessionID: 'ses_1',
time: { created: 1 },
} as Message);
const textPart = (id: string, text: string): Part => ({
id,
type: 'text',
text,
} as Part);
const state = (partial: Partial<State>): Pick<State, 'session' | 'message' | 'part'> => ({
session: [],
message: {},
part: {},
...partial,
});
describe('buildUserMessageHistorySnapshot', () => {
test('returns a shared empty snapshot without a session id', () => {
expect(buildUserMessageHistorySnapshot(state({}), '')).toBe(EMPTY_USER_MESSAGE_HISTORY_SNAPSHOT);
});
test('keeps history stable when assistant parts change', () => {
const user = message('user_1', 'user');
const assistant = message('assistant_1', 'assistant');
const userParts = [textPart('part_user', 'hello')];
const first = buildUserMessageHistorySnapshot(
state({
message: { ses_1: [user, assistant] },
part: { user_1: userParts, assistant_1: [textPart('part_a', 'stream')] },
}),
'ses_1',
);
const second = buildUserMessageHistorySnapshot(
state({
message: { ses_1: [user, assistant] },
part: { user_1: userParts, assistant_1: [textPart('part_a2', 'streaming')] },
}),
'ses_1',
first,
);
expect(second).toBe(first);
expect(second.history).toEqual(['hello']);
});
test('updates history when a user part changes', () => {
const user = message('user_1', 'user');
const first = buildUserMessageHistorySnapshot(
state({
message: { ses_1: [user] },
part: { user_1: [textPart('part_user', 'hello')] },
}),
'ses_1',
);
const second = buildUserMessageHistorySnapshot(
state({
message: { ses_1: [user] },
part: { user_1: [textPart('part_user_updated', 'updated')] },
}),
'ses_1',
first,
);
expect(second).not.toBe(first);
expect(second.history).toEqual(['updated']);
});
test('excludes user messages hidden by session revert state', () => {
const beforeRevert = message('msg_ffffffffffffBefore', 'user');
const reverted = message('msg_000000000000Reverted', 'user');
const snapshot = buildUserMessageHistorySnapshot(
state({
session: [{ id: 'ses_1', revert: { messageID: reverted.id } } as State['session'][number]],
message: { ses_1: [beforeRevert, reverted] },
part: {
[beforeRevert.id]: [textPart('part_user_1', 'kept')],
[reverted.id]: [textPart('part_user_2', 'reverted')],
},
}),
'ses_1',
);
expect(snapshot.history).toEqual(['kept']);
});
});