import { beforeEach, describe, expect, it } from "bun:test";
import { gc, gcTick } from "./gc";
import {
  closeSync,
  existsSync,
  mkdirSync,
  openSync,
  readdirSync,
  readFile,
  readFileSync,
  readSync,
  writeFileSync,
  writeSync,
  statSync,
  lstatSync,
  copyFileSync,
  rmSync,
  rmdir,
  rmdirSync,
  createReadStream,
  createWriteStream,
  promises,
  unlinkSync,
  mkdtempSync,
  constants,
  Dirent,
  Stats,
} from "node:fs";
import { join } from "node:path";

const Buffer = globalThis.Buffer || Uint8Array;

if (!import.meta.dir) {
  import.meta.dir = ".";
}

describe("copyFileSync", () => {
  it("should work for files < 128 KB", () => {
    const tempdir = `/tmp/fs.test.js/${Date.now()}/1234/hi`;
    expect(existsSync(tempdir)).toBe(false);
    expect(tempdir.includes(mkdirSync(tempdir, { recursive: true }))).toBe(true);

    // that don't exist
    copyFileSync(import.meta.path, tempdir + "/copyFileSync.js");
    expect(existsSync(tempdir + "/copyFileSync.js")).toBe(true);
    expect(readFileSync(tempdir + "/copyFileSync.js", "utf-8")).toBe(readFileSync(import.meta.path, "utf-8"));

    // that do exist
    copyFileSync(tempdir + "/copyFileSync.js", tempdir + "/copyFileSync.js1");
    writeFileSync(tempdir + "/copyFileSync.js1", "hello");
    copyFileSync(tempdir + "/copyFileSync.js1", tempdir + "/copyFileSync.js");

    expect(readFileSync(tempdir + "/copyFileSync.js", "utf-8")).toBe("hello");
  });

  it("should work for files > 128 KB ", () => {
    const tempdir = `/tmp/fs.test.js/${Date.now()}-1/1234/hi`;
    expect(existsSync(tempdir)).toBe(false);
    expect(tempdir.includes(mkdirSync(tempdir, { recursive: true }))).toBe(true);
    var buffer = new Int32Array(128 * 1024);
    for (let i = 0; i < buffer.length; i++) {
      buffer[i] = i % 256;
    }

    const hash = Bun.hash(buffer.buffer);
    writeFileSync(tempdir + "/copyFileSync.src.blob", buffer.buffer);

    expect(existsSync(tempdir + "/copyFileSync.dest.blob")).toBe(false);
    expect(existsSync(tempdir + "/copyFileSync.src.blob")).toBe(true);
    copyFileSync(tempdir + "/copyFileSync.src.blob", tempdir + "/copyFileSync.dest.blob");

    expect(Bun.hash(readFileSync(tempdir + "/copyFileSync.dest.blob"))).toBe(hash);
    buffer[0] = 255;
    writeFileSync(tempdir + "/copyFileSync.src.blob", buffer.buffer);
    copyFileSync(tempdir + "/copyFileSync.src.blob", tempdir + "/copyFileSync.dest.blob");
    expect(Bun.hash(readFileSync(tempdir + "/copyFileSync.dest.blob"))).toBe(Bun.hash(buffer.buffer));
  });
});

describe("mkdirSync", () => {
  it("should create a directory", () => {
    const tempdir = `/tmp/fs.test.js/${Date.now()}/1234/hi`;
    expect(existsSync(tempdir)).toBe(false);
    expect(tempdir.includes(mkdirSync(tempdir, { recursive: true }))).toBe(true);
    expect(existsSync(tempdir)).toBe(true);
  });
});

it("readdirSync on import.meta.dir", () => {
  const dirs = readdirSync(import.meta.dir);
  expect(dirs.length > 0).toBe(true);
  var match = false;
  gc(true);
  for (let i = 0; i < dirs.length; i++) {
    if (dirs[i] === import.meta.file) {
      match = true;
    }
  }
  gc(true);
  expect(match).toBe(true);
});

// https://github.com/oven-sh/bun/issues/1887
it("mkdtempSync, readdirSync, rmdirSync and unlinkSync with non-ascii", () => {
  const tempdir = mkdtempSync(`/tmp/emoji-fruit-🍇 🍈 🍉 🍊 🍋`);
  expect(existsSync(tempdir)).toBe(true);
  writeFileSync(tempdir + "/non-ascii-👍.txt", "hello");
  const dirs = readdirSync(tempdir);
  expect(dirs.length > 0).toBe(true);
  var match = false;
  gc(true);
  for (let i = 0; i < dirs.length; i++) {
    if (dirs[i].endsWith("non-ascii-👍.txt")) {
      match = true;
      break;
    }
  }
  gc(true);
  expect(match).toBe(true);
  unlinkSync(tempdir + "/non-ascii-👍.txt");
  expect(existsSync(tempdir + "/non-ascii-👍.txt")).toBe(false);
  rmdirSync(tempdir);
  expect(existsSync(tempdir)).toBe(false);
});

it("mkdtempSync() empty name", () => {
  const tempdir = mkdtempSync();
  expect(existsSync(tempdir)).toBe(true);
  writeFileSync(tempdir + "/non-ascii-👍.txt", "hello");
  const dirs = readdirSync(tempdir);
  expect(dirs.length > 0).toBe(true);
  var match = false;
  gc(true);
  for (let i = 0; i < dirs.length; i++) {
    if (dirs[i].endsWith("non-ascii-👍.txt")) {
      match = true;
      break;
    }
  }
  gc(true);
  expect(match).toBe(true);
  unlinkSync(tempdir + "/non-ascii-👍.txt");
  expect(existsSync(tempdir + "/non-ascii-👍.txt")).toBe(false);
  rmdirSync(tempdir);
  expect(existsSync(tempdir)).toBe(false);
});

it("readdirSync on import.meta.dir with trailing slash", () => {
  const dirs = readdirSync(import.meta.dir + "/");
  expect(dirs.length > 0).toBe(true);
  // this file should exist in it
  var match = false;
  for (let i = 0; i < dirs.length; i++) {
    if (dirs[i] === import.meta.file) {
      match = true;
    }
  }
  expect(match).toBe(true);
});

it("readdirSync works on empty directories", () => {
  const path = `/tmp/fs-test-empty-dir-${(Math.random() * 100000 + 100).toString(32)}`;
  mkdirSync(path, { recursive: true });
  expect(readdirSync(path).length).toBe(0);
});

it("readdirSync works on directories with under 32 files", () => {
  const path = `/tmp/fs-test-one-dir-${(Math.random() * 100000 + 100).toString(32)}`;
  mkdirSync(path, { recursive: true });
  writeFileSync(`${path}/a`, "a");
  const results = readdirSync(path);
  expect(results.length).toBe(1);
  expect(results[0]).toBe("a");
});

it("readdirSync throws when given a file path", () => {
  try {
    readdirSync(import.meta.path);
    throw new Error("should not get here");
  } catch (exception) {
    expect(exception.name).toBe("ENOTDIR");
  }
});

it("readdirSync throws when given a path that doesn't exist", () => {
  try {
    readdirSync(import.meta.path + "/does-not-exist/really");
    throw new Error("should not get here");
  } catch (exception) {
    expect(exception.name).toBe("ENOTDIR");
  }
});

it("readdirSync throws when given a file path with trailing slash", () => {
  try {
    readdirSync(import.meta.path + "/");
    throw new Error("should not get here");
  } catch (exception) {
    expect(exception.name).toBe("ENOTDIR");
  }
});

describe("readSync", () => {
  const firstFourBytes = new Uint32Array(new TextEncoder().encode("File").buffer)[0];
  it("works with a position set to 0", () => {
    const fd = openSync(import.meta.dir + "/readFileSync.txt", "r");
    const four = new Uint8Array(4);

    {
      const count = readSync(fd, four, 0, 4, 0);
      const u32 = new Uint32Array(four.buffer)[0];
      expect(u32).toBe(firstFourBytes);
      expect(count).toBe(4);
    }
    closeSync(fd);
  });
  it("works without position set", () => {
    const fd = openSync(import.meta.dir + "/readFileSync.txt", "r");
    const four = new Uint8Array(4);
    {
      const count = readSync(fd, four);
      const u32 = new Uint32Array(four.buffer)[0];
      expect(u32).toBe(firstFourBytes);
      expect(count).toBe(4);
    }
    closeSync(fd);
  });
});

describe("writeSync", () => {
  it("works with a position set to 0", () => {
    const fd = openSync(import.meta.dir + "/writeFileSync.txt", "w+");
    const four = new Uint8Array(4);

    {
      const count = writeSync(fd, new TextEncoder().encode("File"), 0, 4, 0);
      expect(count).toBe(4);
    }
    closeSync(fd);
  });
  it("works without position set", () => {
    const fd = openSync(import.meta.dir + "/writeFileSync.txt", "w+");
    const four = new Uint8Array(4);
    {
      const count = writeSync(fd, new TextEncoder().encode("File"));
      expect(count).toBe(4);
    }
    closeSync(fd);
  });
});

describe("readFileSync", () => {
  it("works", () => {
    gc();
    const text = readFileSync(import.meta.dir + "/readFileSync.txt", "utf8");
    gc();
    expect(text).toBe("File read successfully");
    gc();
  });

  it("works with a file url", () => {
    gc();
    const text = readFileSync(new URL("file://" + import.meta.dir + "/readFileSync.txt"), "utf8");
    gc();
    expect(text).toBe("File read successfully");
  });

  it("works with special files in the filesystem", () => {
    {
      const text = readFileSync("/dev/null", "utf8");
      gc();
      expect(text).toBe("");
    }

    if (process.platform === "linux") {
      const text = readFileSync("/proc/filesystems");
      gc();
      expect(text.length > 0).toBe(true);
    }
  });

  it("returning Buffer works", () => {
    const text = readFileSync(import.meta.dir + "/readFileSync.txt");
    const encoded = [
      70, 105, 108, 101, 32, 114, 101, 97, 100, 32, 115, 117, 99, 99, 101, 115, 115, 102, 117, 108, 108, 121,
    ];
    for (let i = 0; i < encoded.length; i++) {
      expect(text[i]).toBe(encoded[i]);
    }
  });
});

describe("readFile", () => {
  it("works", async () => {
    gc();
    await new Promise((resolve, reject) => {
      readFile(import.meta.dir + "/readFileSync.txt", "utf8", (err, text) => {
        gc();
        expect(text).toBe("File read successfully");
        resolve(true);
      });
    });
  });

  it("returning Buffer works", async () => {
    gc();
    await new Promise((resolve, reject) => {
      gc();
      readFile(import.meta.dir + "/readFileSync.txt", (err, text) => {
        const encoded = [
          70, 105, 108, 101, 32, 114, 101, 97, 100, 32, 115, 117, 99, 99, 101, 115, 115, 102, 117, 108, 108, 121,
        ];
        gc();
        for (let i = 0; i < encoded.length; i++) {
          expect(text[i]).toBe(encoded[i]);
        }
        resolve(true);
      });
    });
  });
});

describe("writeFileSync", () => {
  it("works", () => {
    const path = `/tmp/${Date.now()}.writeFileSync.txt`;
    writeFileSync(path, "File written successfully", "utf8");

    expect(readFileSync(path, "utf8")).toBe("File written successfully");
  });

  it("returning Buffer works", () => {
    const buffer = new Buffer([
      70, 105, 108, 101, 32, 119, 114, 105, 116, 116, 101, 110, 32, 115, 117, 99, 99, 101, 115, 115, 102, 117, 108, 108,
      121,
    ]);
    const path = `/tmp/${Date.now()}.blob.writeFileSync.txt`;
    writeFileSync(path, buffer);
    const out = readFileSync(path);

    for (let i = 0; i < buffer.length; i++) {
      expect(buffer[i]).toBe(out[i]);
    }
  });
  it("returning ArrayBuffer works", () => {
    const buffer = new Buffer([
      70, 105, 108, 101, 32, 119, 114, 105, 116, 116, 101, 110, 32, 115, 117, 99, 99, 101, 115, 115, 102, 117, 108, 108,
      121,
    ]);
    const path = `/tmp/${Date.now()}.blob2.writeFileSync.txt`;
    writeFileSync(path, buffer);
    const out = readFileSync(path);

    for (let i = 0; i < buffer.length; i++) {
      expect(buffer[i]).toBe(out[i]);
    }
  });
});

function triggerDOMJIT(target, fn, result) {
  for (let i = 0; i < 9999; i++) {
    if (fn.apply(target) !== result) {
      throw new Error("DOMJIT failed");
    }
  }
}

describe("lstat", () => {
  it("file metadata is correct", () => {
    const fileStats = lstatSync(new URL("./fs-stream.js", import.meta.url).toString().slice("file://".length - 1));
    expect(fileStats.isSymbolicLink()).toBe(false);
    expect(fileStats.isFile()).toBe(true);
    expect(fileStats.isDirectory()).toBe(false);

    triggerDOMJIT(fileStats, fileStats.isFile, true);
    triggerDOMJIT(fileStats, fileStats.isDirectory, false);
    triggerDOMJIT(fileStats, fileStats.isSymbolicLink, false);
  });

  it("folder metadata is correct", () => {
    const fileStats = lstatSync(new URL("../../test", import.meta.url).toString().slice("file://".length - 1));
    expect(fileStats.isSymbolicLink()).toBe(false);
    expect(fileStats.isFile()).toBe(false);
    expect(fileStats.isDirectory()).toBe(true);

    triggerDOMJIT(fileStats, fileStats.isFile, false);
    triggerDOMJIT(fileStats, fileStats.isDirectory, true);
    triggerDOMJIT(fileStats, fileStats.isSymbolicLink, false);
  });

  it("symlink metadata is correct", () => {
    const linkStats = lstatSync(new URL("./fs-stream.link.js", import.meta.url).toString().slice("file://".length - 1));
    expect(linkStats.isSymbolicLink()).toBe(true);
    expect(linkStats.isFile()).toBe(false);
    expect(linkStats.isDirectory()).toBe(false);

    triggerDOMJIT(linkStats, linkStats.isFile, false);
    triggerDOMJIT(linkStats, linkStats.isDirectory, false);
    triggerDOMJIT(linkStats, linkStats.isSymbolicLink, true);
  });
});

describe("stat", () => {
  it("file metadata is correct", () => {
    const fileStats = statSync(new URL("./fs-stream.js", import.meta.url).toString().slice("file://".length - 1));
    expect(fileStats.isSymbolicLink()).toBe(false);
    expect(fileStats.isFile()).toBe(true);
    expect(fileStats.isDirectory()).toBe(false);

    triggerDOMJIT(fileStats, fileStats.isFile, true);
    triggerDOMJIT(fileStats, fileStats.isDirectory, false);
    triggerDOMJIT(fileStats, fileStats.isSymbolicLink, false);
  });

  it("folder metadata is correct", () => {
    const fileStats = statSync(new URL("../../test", import.meta.url).toString().slice("file://".length - 1));
    expect(fileStats.isSymbolicLink()).toBe(false);
    expect(fileStats.isFile()).toBe(false);
    expect(fileStats.isDirectory()).toBe(true);
    expect(typeof fileStats.dev).toBe("number");
    expect(typeof fileStats.ino).toBe("number");
    expect(typeof fileStats.mode).toBe("number");
    expect(typeof fileStats.nlink).toBe("number");
    expect(typeof fileStats.uid).toBe("number");
    expect(typeof fileStats.gid).toBe("number");
    expect(typeof fileStats.rdev).toBe("number");
    expect(typeof fileStats.size).toBe("number");
    expect(typeof fileStats.blksize).toBe("number");
    expect(typeof fileStats.blocks).toBe("number");
    expect(typeof fileStats.atimeMs).toBe("number");
    expect(typeof fileStats.mtimeMs).toBe("number");
    expect(typeof fileStats.ctimeMs).toBe("number");
    expect(typeof fileStats.birthtimeMs).toBe("number");
    expect(typeof fileStats.atime).toBe("object");
    expect(typeof fileStats.mtime).toBe("object");
    expect(typeof fileStats.ctime).toBe("object");
    expect(typeof fileStats.birthtime).toBe("object");

    triggerDOMJIT(fileStats, fileStats.isFile, false);
    triggerDOMJIT(fileStats, fileStats.isDirectory, true);
    triggerDOMJIT(fileStats, fileStats.isSymbolicLink, false);
  });

  it("stat returns ENOENT", () => {
    try {
      statSync("/tmp/doesntexist");
      throw "statSync should throw";
    } catch (e) {
      expect(e.code).toBe("ENOENT");
    }
  });
});

describe("rm", () => {
  it("removes a file", () => {
    const path = `/tmp/${Date.now()}.rm.txt`;
    writeFileSync(path, "File written successfully", "utf8");
    expect(existsSync(path)).toBe(true);
    rmSync(path);
    expect(existsSync(path)).toBe(false);
  });

  it("removes a dir", () => {
    const path = `/tmp/${Date.now()}.rm.dir`;
    try {
      mkdirSync(path);
    } catch (e) {}
    expect(existsSync(path)).toBe(true);
    rmSync(path);
    expect(existsSync(path)).toBe(false);
  });

  it("removes a dir recursively", () => {
    const path = `/tmp/${Date.now()}.rm.dir/foo/bar`;
    try {
      mkdirSync(path, { recursive: true });
    } catch (e) {}
    expect(existsSync(path)).toBe(true);
    rmSync(join(path, "../../"), { recursive: true });
    expect(existsSync(path)).toBe(false);
  });
});

describe("rmdir", () => {
  it("removes a file", done => {
    const path = `/tmp/${Date.now()}.rm.txt`;
    writeFileSync(path, "File written successfully", "utf8");
    expect(existsSync(path)).toBe(true);
    rmdir(path, err => {
      try {
        expect(err).toBeDefined();
        expect(err.code).toBe("EPERM");
        expect(err.message).toBe("Operation not permitted");
        expect(existsSync(path)).toBe(true);
      } catch (e) {
        return done(e);
      } finally {
        done();
      }
    });
  });

  it("removes a dir", done => {
    const path = `/tmp/${Date.now()}.rm.dir`;
    try {
      mkdirSync(path);
    } catch (e) {}
    expect(existsSync(path)).toBe(true);
    rmdir(path, err => {
      if (err) return done(err);
      expect(existsSync(path)).toBe(false);
      done();
    });
  });
  // TODO support `recursive: true`
  it("removes a dir recursively", done => {
    const path = `/tmp/${Date.now()}.rm.dir/foo/bar`;
    try {
      mkdirSync(path, { recursive: true });
    } catch (e) {}
    expect(existsSync(path)).toBe(true);
    rmdir(join(path, "../../"), { recursive: true }, err => {
      try {
        expect(existsSync(path)).toBe(false);
        done(err);
      } catch (e) {
        return done(e);
      } finally {
        done();
      }
    });
  });
});

describe("rmdirSync", () => {
  it("removes a file", () => {
    const path = `/tmp/${Date.now()}.rm.txt`;
    writeFileSync(path, "File written successfully", "utf8");
    expect(existsSync(path)).toBe(true);
    expect(() => {
      rmdirSync(path);
    }).toThrow("Operation not permitted");
    expect(existsSync(path)).toBe(true);
  });
  it("removes a dir", () => {
    const path = `/tmp/${Date.now()}.rm.dir`;
    try {
      mkdirSync(path);
    } catch (e) {}
    expect(existsSync(path)).toBe(true);
    rmdirSync(path);
    expect(existsSync(path)).toBe(false);
  });
  // TODO support `recursive: true`
  it("removes a dir recursively", () => {
    const path = `/tmp/${Date.now()}.rm.dir/foo/bar`;
    try {
      mkdirSync(path, { recursive: true });
    } catch (e) {}
    expect(existsSync(path)).toBe(true);
    rmdirSync(join(path, "../../"), { recursive: true });
    expect(existsSync(path)).toBe(false);
  });
});

describe("createReadStream", () => {
  it("works (1 chunk)", async () => {
    return await new Promise((resolve, reject) => {
      var stream = createReadStream(import.meta.dir + "/readFileSync.txt", {});

      stream.on("error", e => {
        reject(e);
      });

      stream.on("data", chunk => {
        expect(chunk instanceof Buffer).toBe(true);
        expect(chunk.length).toBe("File read successfully".length);
        expect(chunk.toString()).toBe("File read successfully");
      });

      stream.on("close", () => {
        resolve(true);
      });
    });
  });

  it("works (22 chunk)", async () => {
    var stream = createReadStream(import.meta.dir + "/readFileSync.txt", {
      highWaterMark: 1,
    });

    var data = readFileSync(import.meta.dir + "/readFileSync.txt", "utf8");
    var i = 0;
    return await new Promise(resolve => {
      stream.on("data", chunk => {
        expect(chunk instanceof Buffer).toBe(true);
        expect(chunk.length).toBe(1);
        expect(chunk.toString()).toBe(data[i++]);
      });

      stream.on("end", () => {
        resolve(true);
      });
    });
  });
});

describe("createWriteStream", () => {
  it("simple write stream finishes", async () => {
    const path = `/tmp/fs.test.js/${Date.now()}.createWriteStream.txt`;
    const stream = createWriteStream(path);
    stream.write("Test file written successfully");
    stream.end();

    return await new Promise((resolve, reject) => {
      stream.on("error", e => {
        reject(e);
      });

      stream.on("finish", () => {
        expect(readFileSync(path, "utf8")).toBe("Test file written successfully");
        resolve(true);
      });
    });
  });

  it("writing null throws ERR_STREAM_NULL_VALUES", async () => {
    const path = `/tmp/fs.test.js/${Date.now()}.createWriteStreamNulls.txt`;
    const stream = createWriteStream(path);
    try {
      stream.write(null);
      expect(() => {}).toThrow(Error);
    } catch (exception) {
      expect(exception.code).toBe("ERR_STREAM_NULL_VALUES");
    }
  });

  it("writing null throws ERR_STREAM_NULL_VALUES (objectMode: true)", async () => {
    const path = `/tmp/fs.test.js/${Date.now()}.createWriteStreamNulls.txt`;
    const stream = createWriteStream(path, {
      objectMode: true,
    });
    try {
      stream.write(null);
      expect(() => {}).toThrow(Error);
    } catch (exception) {
      expect(exception.code).toBe("ERR_STREAM_NULL_VALUES");
    }
  });

  it("writing false throws ERR_INVALID_ARG_TYPE", async () => {
    const path = `/tmp/fs.test.js/${Date.now()}.createWriteStreamFalse.txt`;
    const stream = createWriteStream(path);
    try {
      stream.write(false);
      expect(() => {}).toThrow(Error);
    } catch (exception) {
      expect(exception.code).toBe("ERR_INVALID_ARG_TYPE");
    }
  });

  it("writing false throws ERR_INVALID_ARG_TYPE (objectMode: true)", async () => {
    const path = `/tmp/fs.test.js/${Date.now()}.createWriteStreamFalse.txt`;
    const stream = createWriteStream(path, {
      objectMode: true,
    });
    try {
      stream.write(false);
      expect(() => {}).toThrow(Error);
    } catch (exception) {
      expect(exception.code).toBe("ERR_INVALID_ARG_TYPE");
    }
  });
});

describe("fs/promises", () => {
  const { exists, mkdir, readFile, rmdir, stat, writeFile } = promises;

  it("should not segfault on exception", async () => {
    try {
      await stat("foo/bar");
    } catch (e) {}
  });

  it("readFile", async () => {
    const data = await readFile(import.meta.dir + "/readFileSync.txt", "utf8");
    expect(data).toBe("File read successfully");
  });

  it("writeFile", async () => {
    const path = `/tmp/fs.test.js/${Date.now()}.writeFile.txt`;
    await writeFile(path, "File written successfully");
    expect(readFileSync(path, "utf8")).toBe("File written successfully");
  });

  it("readdir()", async () => {
    const files = await promises.readdir(import.meta.dir);
    expect(files.length).toBeGreaterThan(0);
  });

  it("readdir() no args doesnt segfault", async () => {
    const fizz = [
      [],
      [Symbol("ok")],
      [Symbol("ok"), Symbol("ok")],
      [Symbol("ok"), Symbol("ok"), Symbol("ok")],
      [Infinity, -NaN, -Infinity],
      "\0\0\0\0",
      "\r\n",
    ];
    for (const args of fizz) {
      try {
        // check it doens't segfault when called with invalid arguments
        await promises.readdir(...args);
      } catch (e) {
        // check that producing the error doesn't cause any crashes
        Bun.inspect(e);
      }
    }
  });

  describe("rmdir", () => {
    it("removes a file", async () => {
      const path = `/tmp/${Date.now()}.rm.txt`;
      await writeFile(path, "File written successfully", "utf8");
      expect(await exists(path)).toBe(true);
      try {
        await rmdir(path);
        expect(() => {}).toThrow();
      } catch (err) {
        expect(err.code).toBe("ENOTDIR");
        // expect(err.message).toBe("Operation not permitted");
        expect(await exists(path)).toBe(true);
      }
    });

    it("removes a dir", async () => {
      const path = `/tmp/${Date.now()}.rm.dir`;
      try {
        await mkdir(path);
      } catch (e) {}
      expect(await exists(path)).toBe(true);
      await rmdir(path);
      expect(await exists(path)).toBe(false);
    });
    // TODO support `recursive: true`
    // it("removes a dir recursively", async () => {
    //   const path = `/tmp/${Date.now()}.rm.dir/foo/bar`;
    //   try {
    //     await mkdir(path, { recursive: true });
    //   } catch (e) {}
    //   expect(await exists(path)).toBe(true);
    //   await rmdir(join(path, "../../"), { recursive: true });
    //   expect(await exists(path)).toBe(false);
    // });
  });
});

it("fs.constants", () => {
  expect(constants).toBeDefined();
  expect(constants.F_OK).toBeDefined();
  expect(constants.R_OK).toBeDefined();
  expect(constants.W_OK).toBeDefined();
  expect(constants.X_OK).toBeDefined();
  expect(constants.O_RDONLY).toBeDefined();
  expect(constants.O_WRONLY).toBeDefined();
  expect(constants.O_RDWR).toBeDefined();
  expect(constants.O_CREAT).toBeDefined();
  expect(constants.O_EXCL).toBeDefined();
  expect(constants.O_NOCTTY).toBeDefined();
  expect(constants.O_TRUNC).toBeDefined();
  expect(constants.O_APPEND).toBeDefined();
  expect(constants.O_DIRECTORY).toBeDefined();
  expect(constants.O_NOATIME).toBeDefined();
  expect(constants.O_NOFOLLOW).toBeDefined();
  expect(constants.O_SYNC).toBeDefined();
  expect(constants.O_DSYNC).toBeDefined();
  expect(constants.O_SYMLINK).toBeDefined();
  expect(constants.O_DIRECT).toBeDefined();
  expect(constants.O_NONBLOCK).toBeDefined();
  expect(constants.S_IFMT).toBeDefined();
  expect(constants.S_IFREG).toBeDefined();
  expect(constants.S_IFDIR).toBeDefined();
  expect(constants.S_IFCHR).toBeDefined();
  expect(constants.S_IFBLK).toBeDefined();
  expect(constants.S_IFIFO).toBeDefined();
  expect(constants.S_IFLNK).toBeDefined();
  expect(constants.S_IFSOCK).toBeDefined();
  expect(constants.S_IRWXU).toBeDefined();
  expect(constants.S_IRUSR).toBeDefined();
  expect(constants.S_IWUSR).toBeDefined();
  expect(constants.S_IXUSR).toBeDefined();
  expect(constants.S_IRWXG).toBeDefined();
  expect(constants.S_IRGRP).toBeDefined();
  expect(constants.S_IWGRP).toBeDefined();
  expect(constants.S_IXGRP).toBeDefined();
  expect(constants.S_IRWXO).toBeDefined();
  expect(constants.S_IROTH).toBeDefined();
  expect(constants.S_IWOTH).toBeDefined();
});

it("fs.Dirent", () => {
  expect(Dirent).toBeDefined();
});

it("fs.Stats", () => {
  expect(Stats).toBeDefined();
});