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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import {  assert,  assertEquals,  assertStringIncludes,  assertThrows,} from "../testing/asserts.ts";
import * as path from "../path/mod.ts";import Module, { createRequire } from "./module.ts";import nodeMods from "./module_all.ts";
const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));const testdataDir = path.resolve(moduleDir, path.join("_fs", "testdata"));
const require = createRequire(import.meta.url);
Deno.test("requireSuccess", function () {  // Relative to import.meta.url  const result = require("./_module/cjs/cjs_a.js");  assert("helloA" in result);  assert("helloB" in result);  assert("C" in result);  assert("leftPad" in result);  assertEquals(result.helloA(), "A");  assertEquals(result.helloB(), "B");  assertEquals(result.C, "C");  assertEquals(result.leftPad("pad", 4), " pad");});
Deno.test("requireCycle", function () {  const resultA = require("./_module/cjs/cjs_cycle_a");  const resultB = require("./_module/cjs/cjs_cycle_b");  assert(resultA);  assert(resultB);});
Deno.test("requireBuiltin", function () {  const fs = require("fs");  assert("readFileSync" in fs);  const { readFileSync, isNull, extname } = require(    "./_module/cjs/cjs_builtin",  );
  const testData = path.relative(    Deno.cwd(),    path.join(testdataDir, "hello.txt"),  );  assertEquals(    readFileSync(testData, { encoding: "utf8" }),    "hello world",  );  assert(isNull(null));  assertEquals(extname("index.html"), ".html");});
Deno.test("requireIndexJS", function () {  const { isIndex } = require("./_module/cjs");  assert(isIndex);});
Deno.test("requireWithNodePrefix", function () {  const osWithPrefix = require("node:os");  const os = require("os");  assert(osWithPrefix === os);  assert(osWithPrefix.arch);  assert(typeof osWithPrefix.arch() == "string");});
Deno.test("requireNodeOs", function () {  const os = require("os");  assert(os.arch);  assert(typeof os.arch() == "string");});
Deno.test("requireStack", function () {  const { hello } = require("./_module/cjs/cjs_throw");  try {    hello();  } catch (e) {    assert(e instanceof Error);    assert(e.stack);    assertStringIncludes(e.stack, "/_module/cjs/cjs_throw.js");  }});
Deno.test("requireFileInSymlinkDir", () => {  const { C } = require("./_module/cjs/dir");  assertEquals(C, "C");});
Deno.test("requireModuleWithConditionalExports", () => {  const { red, blue } = require("./_module/cjs/cjs_conditional_exports");  assert(typeof red === "function");  assert(typeof blue === "function");});
const SUPPORTED_NODE_MODULES = Object.keys(nodeMods);
Deno.test("requireNodeJsNativeModules", () => {  // Checks these exist and don't throw.  for (const name of SUPPORTED_NODE_MODULES) {    require(name);  }});
Deno.test("native modules are extensible", () => {  const randomKey = "random-key";  const randomValue = "random-value";  for (const name of SUPPORTED_NODE_MODULES) {    const mod = require(name);    Object.defineProperty(mod, randomKey, {      value: randomValue,      configurable: true,    });    assertEquals(mod[randomKey], randomValue);    delete mod[randomKey];    assertEquals(mod[randomKey], undefined);  }});
Deno.test("Require file with shebang", () => {  require("./testdata/shebang.js");});
Deno.test("EventEmitter is exported correctly", () => {  const EventEmitter = require("events");  assertEquals(EventEmitter, EventEmitter.EventEmitter);});
Deno.test("Require .mjs", () => {  assertThrows(    () => require("./testdata/inspect.mjs"),    Error,    "Importing ESM module:",  );});
Deno.test("requireErrorInEval", async function () {  const cwd = path.dirname(path.fromFileUrl(import.meta.url));
  const command = new Deno.Command(Deno.execPath(), {    args: [      "run",      "--unstable",      "--allow-read",      "./_module/cjs/test_cjs_import.js",    ],    cwd,  });  const { stderr, stdout } = await command.output();
  const decoder = new TextDecoder();  const outputError = decoder.decode(stderr);
  assert(!stdout.length);  assert(    outputError.includes(      'To load an ES module, set "type": "module" in the package.json or use the .mjs extension.',    ),  );  assert(    outputError.includes(      "SyntaxError: Cannot use import statement outside a module",    ),  );});
Deno.test("requireCjsWithDynamicImport", function () {  require("./_module/cjs/cjs_with_dynamic_import");});
Deno.test("requireWithImportsExports", function () {  require("./_module/cjs/cjs_imports_exports");});
Deno.test("module has proper members", function () {  const module = require("module");
  assert(module._cache);  assert(module._extensions);  assert(typeof module._findPath == "function");  assert(typeof module._initPaths == "function");  assert(typeof module._load == "function");  assert(typeof module._nodeModulePaths == "function");  assert(module._pathCache);  assert(typeof module._preloadModules == "function");  assert(typeof module._resolveFilename == "function");  assert(typeof module._resolveLookupPaths == "function");  assert(module.builtinModules);  assert(typeof module.createRequire == "function");  assert(module.globalPaths);  assert(module.Module === Module);  assert(typeof module.wrap == "function");});
Deno.test("a module can have its own timers declarations", function () {  require("./_module/cjs/cjs_declare_timers");});
Deno.test("require in a web worker", async () => {  const code = `\    import { createRequire } from "${new URL("module.ts", import.meta.url)}";    const require = createRequire("${import.meta.url}");    const result = require("./_module/cjs/cjs_a.js");    if (result.helloA() != "A") {      throw new Error("assertion failed in worker");    }    postMessage(null);  `;  const worker = new Worker(    `data:application/javascript;base64,${btoa(code)}`,    { type: "module" },  );  await new Promise((resolve, reject) => {    worker.addEventListener("message", resolve);    worker.addEventListener("error", reject);  });  worker.terminate();});
Deno.test("createRequire with http(s):// URL  throws with correct error message", () => {  assertThrows(    () => createRequire("http://example.com/foo.js"),    Error,    "createRequire only supports 'file://' URLs for the 'filename' parameter. Received 'http://example.com/foo.js'",  );  assertThrows(    () => createRequire("https://example.com/foo.js"),    Error,    "createRequire only supports 'file://' URLs for the 'filename' parameter. Received 'https://example.com/foo.js'",  );});
Deno.test("require Node-API module", {  ignore: Deno.build.arch === "aarch64" && Deno.build.os === "darwin",}, () => {  const require = createRequire(import.meta.url);  if (Deno.build.os === "windows") {    // TODO(kt3k): Add lib binary for windows from 1_hello_world example of    // https://github.com/nodejs/node-addon-examples  }  if (Deno.build.os === "linux") {    // TODO(kt3k): Add lib binary for linux from 1_hello_world example of    // https://github.com/nodejs/node-addon-examples  }  if (Deno.build.os === "darwin") {    const str = require("./testdata/libhello_darwin.node").hello();    assertEquals(str, "world");  }});