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std/node/module_test.ts

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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"), undefined, "Importing ESM module", );});
Deno.test("requireErrorInEval", async function () { const cwd = path.dirname(path.fromFileUrl(import.meta.url));
const p = Deno.run({ cmd: [ Deno.execPath(), "run", "--unstable", "--allow-read", "./_module/cjs/test_cjs_import.js", ], cwd, stdout: "piped", stderr: "piped", });
const decoder = new TextDecoder(); const output = await p.output(); const outputError = decoder.decode(await p.stderrOutput());
assert(!output.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", ), ); p.close();});
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");});