import { describe, expect, it } from "vitest";
import { fakeFs } from "./fakeFs";

describe("fakeFs", () => {
  const fs = fakeFs({
    files: { "/root/a/SKILL.md": "# a", "/root/a/ref/x.md": "x", "/root/b.txt": "b", "/outside/secret": "s" },
    symlinks: { "/root/link": "/outside" },
  });

  it("lists directories, files and symlinks", async () => {
    expect(await fs.readdir("/root")).toEqual([
      { name: "a", isDirectory: true, isFile: false },
      { name: "b.txt", isDirectory: false, isFile: true },
      { name: "link", isDirectory: false, isFile: false },
    ]);
  });

  it("stats files and dirs, throws ENOENT otherwise", async () => {
    expect((await fs.stat("/root/a")).isDirectory).toBe(true);
    expect((await fs.stat("/root/a/SKILL.md")).size).toBe(3);
    await expect(fs.stat("/root/nope")).rejects.toMatchObject({ code: "ENOENT" });
  });

  it("resolves symlinks by prefix in realpath", async () => {
    expect(await fs.realpath("/root/link/secret")).toBe("/outside/secret");
    expect(await fs.realpath("/root/a/ref/x.md")).toBe("/root/a/ref/x.md");
  });

  it("realpath throws ENOENT when the path through a symlink does not exist", async () => {
    await expect(fs.realpath("/root/link/nope")).rejects.toMatchObject({ code: "ENOENT" });
    await expect(fs.realpath("/root/nope")).rejects.toMatchObject({ code: "ENOENT" });
  });

  it("follows a symlinked directory in stat, readdir and readFile", async () => {
    const linked = fakeFs({
      files: { "/outside/SKILL.md": "# o", "/outside/sub/y.md": "y" },
      symlinks: { "/root/link": "/outside" },
    });
    expect((await linked.stat("/root/link")).isDirectory).toBe(true);
    expect((await linked.stat("/root/link/SKILL.md")).size).toBe(3);
    expect(await linked.readdir("/root/link")).toEqual([
      { name: "SKILL.md", isDirectory: false, isFile: true },
      { name: "sub", isDirectory: true, isFile: false },
    ]);
    expect((await linked.readFile("/root/link/SKILL.md")).toString()).toBe("# o");
  });

  it("write bumps mtime", async () => {
    const before = (await fs.stat("/root/a/SKILL.md")).mtimeMs;
    fs.write("/root/a/SKILL.md", "# a2");
    expect((await fs.stat("/root/a/SKILL.md")).mtimeMs).toBeGreaterThan(before);
  });
});

import { describe, expect, it } from "vitest";
import { fakeFs } from "./fakeFs";

describe("fakeFs", () => {
  const fs = fakeFs({
    files: { "/root/a/SKILL.md": "# a", "/root/a/ref/x.md": "x", "/root/b.txt": "b", "/outside/secret": "s" },
    symlinks: { "/root/link": "/outside" },
  });

  it("lists directories, files and symlinks", async () => {
    expect(await fs.readdir("/root")).toEqual([
      { name: "a", isDirectory: true, isFile: false },
      { name: "b.txt", isDirectory: false, isFile: true },
      { name: "link", isDirectory: false, isFile: false },
    ]);
  });

  it("stats files and dirs, throws ENOENT otherwise", async () => {
    expect((await fs.stat("/root/a")).isDirectory).toBe(true);
    expect((await fs.stat("/root/a/SKILL.md")).size).toBe(3);
    await expect(fs.stat("/root/nope")).rejects.toMatchObject({ code: "ENOENT" });
  });

  it("resolves symlinks by prefix in realpath", async () => {
    expect(await fs.realpath("/root/link/secret")).toBe("/outside/secret");
    expect(await fs.realpath("/root/a/ref/x.md")).toBe("/root/a/ref/x.md");
  });

  it("realpath throws ENOENT when the path through a symlink does not exist", async () => {
    await expect(fs.realpath("/root/link/nope")).rejects.toMatchObject({ code: "ENOENT" });
    await expect(fs.realpath("/root/nope")).rejects.toMatchObject({ code: "ENOENT" });
  });

  it("follows a symlinked directory in stat, readdir and readFile", async () => {
    const linked = fakeFs({
      files: { "/outside/SKILL.md": "# o", "/outside/sub/y.md": "y" },
      symlinks: { "/root/link": "/outside" },
    });
    expect((await linked.stat("/root/link")).isDirectory).toBe(true);
    expect((await linked.stat("/root/link/SKILL.md")).size).toBe(3);
    expect(await linked.readdir("/root/link")).toEqual([
      { name: "SKILL.md", isDirectory: false, isFile: true },
      { name: "sub", isDirectory: true, isFile: false },
    ]);
    expect((await linked.readFile("/root/link/SKILL.md")).toString()).toBe("# o");
  });

  it("write bumps mtime", async () => {
    const before = (await fs.stat("/root/a/SKILL.md")).mtimeMs;
    fs.write("/root/a/SKILL.md", "# a2");
    expect((await fs.stat("/root/a/SKILL.md")).mtimeMs).toBeGreaterThan(before);
  });
});