denoland-deno/cli/tests/unit/dir_test.ts

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { unitTest, assert, assertEquals } from "./test_util.ts";

unitTest({ perms: { read: true } }, function dirCwdNotNull(): void {
  assert(Deno.cwd() != null);
});

unitTest(
  { perms: { read: true, write: true } },
  function dirCwdChdirSuccess(): void {
    const initialdir = Deno.cwd();
    const path = Deno.makeTempDirSync();
    Deno.chdir(path);
    const current = Deno.cwd();
    if (Deno.build.os === "darwin") {
      assertEquals(current, "/private" + path);
    } else {
      assertEquals(current, path);
    }
    Deno.chdir(initialdir);
  }
);

unitTest({ perms: { read: true, write: true } }, function dirCwdError(): void {
  // excluding windows since it throws resource busy, while removeSync
  if (["linux", "darwin"].includes(Deno.build.os)) {
    const initialdir = Deno.cwd();
    const path = Deno.makeTempDirSync();
    Deno.chdir(path);
    Deno.removeSync(path);
    try {
      Deno.cwd();
      throw Error("current directory removed, should throw error");
    } catch (err) {
      if (err instanceof Deno.errors.NotFound) {
        assert(err.name === "NotFound");
      } else {
        throw Error("raised different exception");
      }
    }
    Deno.chdir(initialdir);
  }
});

unitTest(
  { perms: { read: true, write: true } },
  function dirChdirError(): void {
    const path = Deno.makeTempDirSync() + "test";
    try {
      Deno.chdir(path);
      throw Error("directory not available, should throw error");
    } catch (err) {
      if (err instanceof Deno.errors.NotFound) {
        assert(err.name === "NotFound");
      } else {
        throw Error("raised different exception");
      }
    }
  }
);