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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import * as path from "../../path/mod.ts";import { assert } from "../../testing/asserts.ts";import { assertCallbackErrorUncaught } from "../_test_utils.ts";import { copyFile, copyFileSync } from "./_fs_copy.ts";import { existsSync } from "./_fs_exists.ts";
const destFile = "./destination.txt";
Deno.test({  name: "[std/node/fs] copy file",  fn: async () => {    const sourceFile = Deno.makeTempFileSync();    const err = await new Promise((resolve) => {      copyFile(sourceFile, destFile, (err?: Error | null) => resolve(err));    });    assert(!err);    assert(existsSync(destFile));    Deno.removeSync(sourceFile);    Deno.removeSync(destFile);  },});
Deno.test({  name: "[std/node/fs] copy file sync",  fn: () => {    const sourceFile = Deno.makeTempFileSync();    copyFileSync(sourceFile, destFile);    assert(existsSync(destFile));    Deno.removeSync(sourceFile);    Deno.removeSync(destFile);  },});
Deno.test("[std/node/fs] copyFile callback isn't called twice if error is thrown", async () => {  // The correct behaviour is not to catch any errors thrown,  // but that means there'll be an uncaught error and the test will fail.  // So the only way to test this is to spawn a subprocess, and succeed if it has a non-zero exit code.  // (assertRejects won't work because there's no way to catch the error.)  const tempDir = await Deno.makeTempDir();  const tempFile1 = path.join(tempDir, "file1.txt");  const tempFile2 = path.join(tempDir, "file2.txt");  await Deno.writeTextFile(tempFile1, "hello world");  const importUrl = new URL("./_fs_copy.ts", import.meta.url);  await assertCallbackErrorUncaught({    prelude: `import { copyFile } from ${JSON.stringify(importUrl)}`,    invocation: `copyFile(${JSON.stringify(tempFile1)},                          ${JSON.stringify(tempFile2)}, `,    async cleanup() {      await Deno.remove(tempDir, { recursive: true });    },  });});