denoland-deno/std/node/_fs/_fs_chown_test.ts

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
const { test } = Deno;
import { fail, assertEquals } from "../../testing/asserts.ts";
import { chown, chownSync } from "./_fs_chown.ts";

if (Deno.build.os !== "win") {
  //chown is difficult to test.  Best we can do is set the existing user id/group id again
  test({
    name: "ASYNC: setting existing uid/gid works as expected (non-Windows)",
    async fn() {
      const tempFile: string = await Deno.makeTempFile();
      const originalUserId: number | null = (await Deno.lstat(tempFile)).uid;
      const originalGroupId: number | null = (await Deno.lstat(tempFile)).gid;
      await new Promise((resolve, reject) => {
        chown(tempFile, originalUserId!, originalGroupId!, err => {
          if (err) reject(err);
          else resolve();
        });
      })
        .then(() => {
          const newUserId: number | null = Deno.lstatSync(tempFile).uid;
          const newGroupId: number | null = Deno.lstatSync(tempFile).gid;
          assertEquals(newUserId, originalUserId);
          assertEquals(newGroupId, originalGroupId);
        })
        .catch(() => {
          fail();
        })
        .finally(() => {
          Deno.removeSync(tempFile);
        });
    }
  });

  test({
    name: "SYNC: setting existing uid/gid works as expected (non-Windows)",
    fn() {
      const tempFile: string = Deno.makeTempFileSync();
      const originalUserId: number | null = Deno.lstatSync(tempFile).uid;
      const originalGroupId: number | null = Deno.lstatSync(tempFile).gid;
      chownSync(tempFile, originalUserId!, originalGroupId!);

      const newUserId: number | null = Deno.lstatSync(tempFile).uid;
      const newGroupId: number | null = Deno.lstatSync(tempFile).gid;
      assertEquals(newUserId, originalUserId);
      assertEquals(newGroupId, originalGroupId);
      Deno.removeSync(tempFile);
    }
  });
}