import type { ThreadPullRequestLink } from "@t3tools/contracts";import { ProjectId } from "@t3tools/contracts";import { describe, expect, it } from "vite-plus/test";import { savedPullRequestStack, pullRequestStackView } from "./pullRequestStackSnapshot"; const reference = {  projectId: ProjectId.make("project"),  host: "github.com",  repository: "acme/web",  number: 2,};const link: ThreadPullRequestLink = {  host: "github.com",  repository: "acme/web",  number: 2,  url: "https://github.com/acme/web/pull/2",  source: "manual",  linkedAt: "2026-09-09T10:00:00Z",  snapshot: {    title: "Top layer",    headBranch: "top",    baseBranch: "bottom",    state: "open",    isDraft: false,    updatedAt: null,    syncedAt: "2026-09-09T10:00:00Z",  },  stack: {    kind: "native",    id: "stack",    number: 3,    url: "https://github.com/acme/web/pull/3",    base: "main",    layers: [      { number: 1, headBranch: "bottom", state: "open" },      { number: 2, headBranch: "top", state: "open" },    ],  },}; describe("saved stack navigation", () => {  it("preserves all native layers even when only one has a linked snapshot, without action SHAs", () => {    const saved = savedPullRequestStack([link], reference);    expect(saved?.layers).toEqual([      { number: 1, headBranch: "bottom", state: "open" },      { number: 2, headBranch: "top", state: "open", title: "Top layer", isDraft: false },    ]);    expect(savedPullRequestStack([link], { ...reference, number: 1 })?.number).toBe(3);  });  it("does not borrow stacks across hosts or repositories", () => {    expect(savedPullRequestStack([link], { ...reference, host: "enterprise.example" })).toBeNull();    expect(savedPullRequestStack([link], { ...reference, repository: "other/web" })).toBeNull();    expect(savedPullRequestStack([link], { ...reference, host: undefined })).toBeNull();  });  it("honors a newer saved removal across linked threads", () => {    expect(      savedPullRequestStack(        [          link,          {            ...link,            stack: null,            snapshot: { ...link.snapshot!, syncedAt: "2026-09-09T11:00:00Z" },          },        ],        reference,      ),    ).toBeNull();  });  it("shows saved data during loading and marks a failed refresh stale", () => {    const saved = savedPullRequestStack([link], reference);    const query = { data: null, isSuccess: false, isPending: true, error: null };    expect(pullRequestStackView(query, saved)).toMatchObject({      data: saved,      isFresh: false,      notice: expect.stringContaining("Refreshing"),    });    expect(      pullRequestStackView({ ...query, isPending: false, error: "Rate limited" }, saved),    ).toMatchObject({ data: saved, isFresh: false, notice: expect.stringContaining("stale") });  });  it("prefers refreshed data and honors a successful absence", () => {    const saved = savedPullRequestStack([link], reference);    const query = { data: saved, isSuccess: true, isPending: false, error: null };    expect(pullRequestStackView(query, null)).toEqual({ data: saved, isFresh: true, notice: null });    expect(pullRequestStackView({ ...query, data: null }, saved)).toEqual({      data: null,      isFresh: true,      notice: null,    });    expect(pullRequestStackView({ ...query, isPending: true }, saved).isFresh).toBe(false);  });});