import { describe, expect, it } from "vitest";
import type { WikiChange } from "../api/queries.ts";
import { authorName, deltaText, groupByPage } from "./group.ts";

const c = (page_code: string, version: string): WikiChange => ({
  at: "2026-10-28T09:00:00+00:00", page_code, title: page_code, path: null, version,
  author: { login: null, name: null }, added: 1, removed: 0,
});

describe("группировка правок вики", () => {
  it("по странице, по первому появлению; правки — в порядке ответа", () => {
    const g = groupByPage([c("DOC-3", "V3"), c("DOC-2", "V2"), c("DOC-3", "V1")]);
    expect(g.map((x) => x.code)).toEqual(["DOC-3", "DOC-2"]);
    expect(g[0].changes.map((x) => x.version)).toEqual(["V3", "V1"]);
  });
  it("deltaText: плюс, косая черта, минус U+2212", () => {
    expect(deltaText({ added: 40, removed: 12 })).toBe("+40 / −12");
  });
  it("authorName: имя, иначе логин, иначе «—»", () => {
    expect(authorName({ login: "x", name: null })).toBe("x");
    expect(authorName({ login: "x", name: "Икс" })).toBe("Икс");
    expect(authorName({ login: null, name: null })).toBe("—");
  });
});