import { describe, expect, it } from "vite-plus/test"; import {  removeAndRenumberTimelineItem,  upsertTimelineItemAtStablePosition,} from "./orchestrationV2Timeline"; describe("removeAndRenumberTimelineItem", () => {  it("closes the position gap before a streamed item is reinserted", () => {    const remaining = removeAndRenumberTimelineItem(      [        { position: 0, sourceItemId: "first" },        { position: 1, sourceItemId: "streaming" },        { position: 2, sourceItemId: "last" },      ],      "streaming",    );     expect(remaining).toEqual([      { position: 0, sourceItemId: "first" },      { position: 1, sourceItemId: "last" },    ]);    expect(new Set(remaining.map((row) => row.position)).size).toBe(remaining.length);  });}); describe("upsertTimelineItemAtStablePosition", () => {  it("replaces a streaming item without moving it behind newer items", () => {    const updated = upsertTimelineItemAtStablePosition(      [        { position: 0, sourceItemId: "reasoning", text: "partial" },        { position: 1, sourceItemId: "subagent", text: "running" },      ],      { position: 2, sourceItemId: "reasoning", text: "completed" },    );     expect(updated).toEqual([      { position: 0, sourceItemId: "reasoning", text: "completed" },      { position: 1, sourceItemId: "subagent", text: "running" },    ]);  });   it("appends a genuinely new item at the next position", () => {    const updated = upsertTimelineItemAtStablePosition(      [{ position: 0, sourceItemId: "reasoning" }],      { position: 99, sourceItemId: "assistant" },    );     expect(updated).toEqual([      { position: 0, sourceItemId: "reasoning" },      { position: 1, sourceItemId: "assistant" },    ]);  });});