source: imaps-frontend/node_modules/is-core-module/test/index.js

'use strict';

var test = require('tape');
var keys = require('object-keys');
var semver = require('semver');
var mockProperty = require('mock-property');

var isCore = require('../');
var data = require('../core.json');

var supportsNodePrefix = semver.satisfies(process.versions.node, '^14.18 || >= 16', { includePrerelease: true });

test('core modules', function (t) {
        t.test('isCore()', function (st) {
                st.ok(isCore('fs'));
                st.ok(isCore('net'));
                st.ok(isCore('http'));

                st.ok(!isCore('seq'));
                st.ok(!isCore('../'));

                st.ok(!isCore('toString'));

                st.end();
        });

        t.test('core list', function (st) {
                var cores = keys(data);
                st.plan(cores.length);

                for (var i = 0; i < cores.length; ++i) {
                        var mod = cores[i];
                        var requireFunc = function () { require(mod); }; // eslint-disable-line no-loop-func
                        if (isCore(mod)) {
                                st.doesNotThrow(requireFunc, mod + ' supported; requiring does not throw');
                        } else {
                                st['throws'](requireFunc, mod + ' not supported; requiring throws');
                        }
                }

                st.end();
        });

        t.test('core via repl module', { skip: !data.repl }, function (st) {
                var libs = require('repl')._builtinLibs; // eslint-disable-line no-underscore-dangle
                if (!libs) {
                        st.skip('repl._builtinLibs does not exist');
                } else {
                        for (var i = 0; i < libs.length; ++i) {
                                var mod = libs[i];
                                st.ok(data[mod], mod + ' is a core module');
                                st.doesNotThrow(
                                        function () { require(mod); }, // eslint-disable-line no-loop-func
                                        'requiring ' + mod + ' does not throw'
                                );
                                if (mod.slice(0, 5) !== 'node:') {
                                        if (supportsNodePrefix) {
                                                st.doesNotThrow(
                                                        function () { require('node:' + mod); }, // eslint-disable-line no-loop-func
                                                        'requiring node:' + mod + ' does not throw'
                                                );
                                        } else {
                                                st['throws'](
                                                        function () { require('node:' + mod); }, // eslint-disable-line no-loop-func
                                                        'requiring node:' + mod + ' throws'
                                                );
                                        }
                                }
                        }
                }
                st.end();
        });

        t.test('core via builtinModules list', { skip: !data.module }, function (st) {
                var libs = require('module').builtinModules;
                if (!libs) {
                        st.skip('module.builtinModules does not exist');
                } else {
                        var excludeList = [
                                '_debug_agent',
                                'v8/tools/tickprocessor-driver',
                                'v8/tools/SourceMap',
                                'v8/tools/tickprocessor',
                                'v8/tools/profile'
                        ];

                        // see https://github.com/nodejs/node/issues/42785
                        if (semver.satisfies(process.version, '>= 18')) {
                                libs = libs.concat('node:test');
                        }
                        if (semver.satisfies(process.version, '^20.12 || >= 21.7')) {
                                libs = libs.concat('node:sea');
                        }

                        for (var i = 0; i < libs.length; ++i) {
                                var mod = libs[i];
                                if (excludeList.indexOf(mod) === -1) {
                                        st.ok(data[mod], mod + ' is a core module');
                                        st.doesNotThrow(
                                                function () { require(mod); }, // eslint-disable-line no-loop-func
                                                'requiring ' + mod + ' does not throw'
                                        );
                                        if (mod.slice(0, 5) !== 'node:') {
                                                if (supportsNodePrefix) {
                                                        st.doesNotThrow(
                                                                function () { require('node:' + mod); }, // eslint-disable-line no-loop-func
                                                                'requiring node:' + mod + ' does not throw'
                                                        );
                                                } else {
                                                        st['throws'](
                                                                function () { require('node:' + mod); }, // eslint-disable-line no-loop-func
                                                                'requiring node:' + mod + ' throws'
                                                        );
                                                }
                                        }
                                }
                        }
                }
                st.end();
        });

        t.test('Object.prototype pollution', function (st) {
                var nonKey = 'not a core module';
                st.teardown(mockProperty(Object.prototype, 'fs', { value: false }));
                st.teardown(mockProperty(Object.prototype, 'path', { value: '>= 999999999' }));
                st.teardown(mockProperty(Object.prototype, 'http', { value: data.http }));
                st.teardown(mockProperty(Object.prototype, nonKey, { value: true }));

                st.equal(isCore('fs'), true, 'fs is a core module even if Object.prototype lies');
                st.equal(isCore('path'), true, 'path is a core module even if Object.prototype lies');
                st.equal(isCore('http'), true, 'path is a core module even if Object.prototype matches data');
                st.equal(isCore(nonKey), false, '"' + nonKey + '" is not a core module even if Object.prototype lies');

                st.end();
        });

        t.end();
});