index.js
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'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');
}
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();
});