Agent-System-Frontend/test/live.test.ts

// live 流式投影纯逻辑测试（中栏过程/回复分离）：到达序并段、process 标记时机、
// 轮次穿插同构、过程区折叠谓词。
import { describe, it, expect } from 'vitest'
import {
  applyTextDelta, applyThinkingDelta, applyToolCall, applyToolResult,
  liveToMessage, showProcessInline, type LiveItem,
} from '../src/live'
import type { LiveState } from '../src/store'

function live(over: Partial<LiveState> = {}): LiveState {
  return { runId: 'r1', phase: 'thinking', items: [], agentNotes: {}, startedAt: 0, ...over }
}

// 两轮流式事件回放：思考→解说文本→工具→思考→最终回复（与后端事件序一致）。
function twoTurnItems(): LiveItem[] {
  let items: LiveItem[] = []
  items = applyThinkingDelta(items, '先想想')
  items = applyThinkingDelta(items, '一下')
  items = applyTextDelta(items, 0, '我先更新待办。')
  items = applyToolCall(items, 'update_todos')
  items = applyToolResult(items, 'ok', '已更新')
  items = applyThinkingDelta(items, '再想想')
  items = applyTextDelta(items, 1, '最终')
  items = applyTextDelta(items, 1, '回复')
  return items
}

describe('applyThinkingDelta / applyTextDelta', () => {
  it('merges thinking deltas into the last thinking segment', () => {
    let items: LiveItem[] = []
    items = applyThinkingDelta(items, '先')
    items = applyThinkingDelta(items, '想想')
    expect(items).toEqual([{ kind: 'thinking', text: '先想想' }])
  })
  it('opens a new thinking segment after text/tool (turn boundary)', () => {
    let items: LiveItem[] = applyThinkingDelta([], '第一轮思考')
    items = applyTextDelta(items, 0, '解说')
    items = applyThinkingDelta(items, '第二轮思考')
    expect(items).toEqual([
      { kind: 'thinking', text: '第一轮思考' },
      { kind: 'text', index: 0, text: '解说' },
      { kind: 'thinking', text: '第二轮思考' },
    ])
  })
  it('appends text to the last segment when index matches', () => {
    let items: LiveItem[] = []
    items = applyTextDelta(items, 0, '先查')
    items = applyTextDelta(items, 0, '一下')
    expect(items).toEqual([{ kind: 'text', index: 0, text: '先查一下' }])
  })
  it('opens a new text segment when index advances (new turn)', () => {
    let items: LiveItem[] = applyTextDelta([], 0, '解说')
    items = applyTextDelta(items, 1, '最终')
    items = applyTextDelta(items, 1, '回复')
    expect(items).toEqual([
      { kind: 'text', index: 0, text: '解说' },
      { kind: 'text', index: 1, text: '最终回复' },
    ])
  })
  it('fills the most recent pending tool call', () => {
    let items: LiveItem[] = []
    items = applyToolCall(items, 'a')
    items = applyToolCall(items, 'b')
    items = applyToolResult(items, 'ok', '结果')
    expect(items).toEqual([
      { kind: 'tool', name: 'a' },
      { kind: 'tool', name: 'b', status: 'ok', summary: '结果' },
    ])
  })
})

describe('liveToMessage', () => {
  it('interleaves parts per turn in arrival order, matching persisted parts', () => {
    const msg = liveToMessage(live({ items: twoTurnItems() }))
    expect(msg.parts).toEqual([
      { type: 'thinking', text: '先想想一下', process: true },
      { type: 'text', text: '我先更新待办。', process: true },
      { type: 'tool_call', process: true, toolCall: { id: '', name: 'update_todos' } },
      { type: 'tool_result', process: true, toolCall: { id: '', name: 'update_todos' },
        toolResult: { callId: '', status: 'ok', summary: '已更新' } },
      { type: 'thinking', text: '再想想', process: true },
      { type: 'text', text: '最终回复' },
    ])
  })
  it('marks the in-flight segment as process the moment its tool call arrives', () => {
    let items: LiveItem[] = []
    items = applyTextDelta(items, 0, '我先查一下')
    const before = liveToMessage(live({ items }))
    expect(before.parts.map(p => p.process)).toEqual([undefined]) // 尚无工具：仍在回复位
    items = applyToolCall(items, 'web_search')
    const after = liveToMessage(live({ items }))
    expect(after.parts.map(p => p.process)).toEqual([true, true]) // tool.call 一到即改标
  })
  it('single final segment without tools carries no process flag', () => {
    let items: LiveItem[] = []
    items = applyTextDelta(items, 0, '直接回答')
    const msg = liveToMessage(live({ items }))
    expect(msg.parts.map(p => p.process)).toEqual([undefined])
  })
  it('tools between segments keep every non-final segment in the process area', () => {
    let items: LiveItem[] = []
    items = applyTextDelta(items, 0, '第一轮')
    items = applyToolCall(items, 'a')
    items = applyToolResult(items, 'ok')
    items = applyTextDelta(items, 1, '第二轮')
    items = applyToolCall(items, 'b')
    items = applyTextDelta(items, 2, '最终回复')
    const msg = liveToMessage(live({ items }))
    expect(msg.parts.filter(p => p.type === 'text').map(p => p.process)).toEqual([true, true, undefined])
    // 顺序必须与落库穿插序一致：text → tool → text → tool → text。
    expect(msg.parts.map(p => p.type)).toEqual(['text', 'tool_call', 'tool_result', 'text', 'tool_call', 'text'])
  })
  it('thinking and tool parts are always process', () => {
    let items: LiveItem[] = []
    items = applyThinkingDelta(items, '想')
    items = applyTextDelta(items, 0, '答')
    items = applyToolCall(items, 'web_search')
    items = applyToolResult(items, 'ok', '命中')
    const msg = liveToMessage(live({ items }))
    for (const p of msg.parts.filter(p => p.type !== 'text')) expect(p.process).toBe(true)
  })
})

describe('showProcessInline', () => {
  it('expands during thinking/acting and collapses the moment responding starts', () => {
    expect(showProcessInline(live({ phase: 'thinking' }), true)).toBe(true)
    expect(showProcessInline(live({ phase: 'acting' }), true)).toBe(true)
    expect(showProcessInline(live({ phase: 'responding' }), true)).toBe(false)
  })
  it('falls back to the auto-collapse preference when no live run', () => {
    expect(showProcessInline(null, true)).toBe(false)
    expect(showProcessInline(null, false)).toBe(true)
  })
})