275 lines
8.6 KiB
JavaScript
275 lines
8.6 KiB
JavaScript
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'use strict';
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var GetIntrinsic = require('../');
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var test = require('tape');
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var forEach = require('for-each');
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var debug = require('object-inspect');
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var generatorFns = require('make-generator-function')();
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var asyncFns = require('make-async-function').list();
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var asyncGenFns = require('make-async-generator-function')();
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var mockProperty = require('mock-property');
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var callBound = require('call-bind/callBound');
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var v = require('es-value-fixtures');
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var $gOPD = require('gopd');
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var DefinePropertyOrThrow = require('es-abstract/2021/DefinePropertyOrThrow');
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var $isProto = callBound('%Object.prototype.isPrototypeOf%');
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test('export', function (t) {
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t.equal(typeof GetIntrinsic, 'function', 'it is a function');
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t.equal(GetIntrinsic.length, 2, 'function has length of 2');
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t.end();
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});
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test('throws', function (t) {
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t['throws'](
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function () { GetIntrinsic('not an intrinsic'); },
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SyntaxError,
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'nonexistent intrinsic throws a syntax error'
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);
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t['throws'](
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function () { GetIntrinsic(''); },
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TypeError,
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'empty string intrinsic throws a type error'
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);
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t['throws'](
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function () { GetIntrinsic('.'); },
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SyntaxError,
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'"just a dot" intrinsic throws a syntax error'
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);
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t['throws'](
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function () { GetIntrinsic('%String'); },
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SyntaxError,
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'Leading % without trailing % throws a syntax error'
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);
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t['throws'](
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function () { GetIntrinsic('String%'); },
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SyntaxError,
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'Trailing % without leading % throws a syntax error'
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);
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t['throws'](
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function () { GetIntrinsic("String['prototype]"); },
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SyntaxError,
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'Dynamic property access is disallowed for intrinsics (unterminated string)'
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);
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t['throws'](
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function () { GetIntrinsic('%Proxy.prototype.undefined%'); },
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TypeError,
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"Throws when middle part doesn't exist (%Proxy.prototype.undefined%)"
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);
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t['throws'](
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function () { GetIntrinsic('%Array.prototype%garbage%'); },
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SyntaxError,
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'Throws with extra percent signs'
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);
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t['throws'](
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function () { GetIntrinsic('%Array.prototype%push%'); },
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SyntaxError,
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'Throws with extra percent signs, even on an existing intrinsic'
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);
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forEach(v.nonStrings, function (nonString) {
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t['throws'](
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function () { GetIntrinsic(nonString); },
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TypeError,
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debug(nonString) + ' is not a String'
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);
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});
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forEach(v.nonBooleans, function (nonBoolean) {
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t['throws'](
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function () { GetIntrinsic('%', nonBoolean); },
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TypeError,
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debug(nonBoolean) + ' is not a Boolean'
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);
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});
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forEach([
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'toString',
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'propertyIsEnumerable',
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'hasOwnProperty'
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], function (objectProtoMember) {
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t['throws'](
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function () { GetIntrinsic(objectProtoMember); },
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SyntaxError,
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debug(objectProtoMember) + ' is not an intrinsic'
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);
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});
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t.end();
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});
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test('base intrinsics', function (t) {
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t.equal(GetIntrinsic('%Object%'), Object, '%Object% yields Object');
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t.equal(GetIntrinsic('Object'), Object, 'Object yields Object');
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t.equal(GetIntrinsic('%Array%'), Array, '%Array% yields Array');
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t.equal(GetIntrinsic('Array'), Array, 'Array yields Array');
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t.end();
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});
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test('dotted paths', function (t) {
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t.equal(GetIntrinsic('%Object.prototype.toString%'), Object.prototype.toString, '%Object.prototype.toString% yields Object.prototype.toString');
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t.equal(GetIntrinsic('Object.prototype.toString'), Object.prototype.toString, 'Object.prototype.toString yields Object.prototype.toString');
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t.equal(GetIntrinsic('%Array.prototype.push%'), Array.prototype.push, '%Array.prototype.push% yields Array.prototype.push');
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t.equal(GetIntrinsic('Array.prototype.push'), Array.prototype.push, 'Array.prototype.push yields Array.prototype.push');
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test('underscore paths are aliases for dotted paths', { skip: !Object.isFrozen || Object.isFrozen(Object.prototype) }, function (st) {
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var original = GetIntrinsic('%ObjProto_toString%');
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forEach([
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'%Object.prototype.toString%',
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'Object.prototype.toString',
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'%ObjectPrototype.toString%',
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'ObjectPrototype.toString',
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'%ObjProto_toString%',
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'ObjProto_toString'
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], function (name) {
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DefinePropertyOrThrow(Object.prototype, 'toString', {
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'[[Value]]': function toString() {
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return original.apply(this, arguments);
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}
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});
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st.equal(GetIntrinsic(name), original, name + ' yields original Object.prototype.toString');
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});
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DefinePropertyOrThrow(Object.prototype, 'toString', { '[[Value]]': original });
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st.end();
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});
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test('dotted paths cache', { skip: !Object.isFrozen || Object.isFrozen(Object.prototype) }, function (st) {
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var original = GetIntrinsic('%Object.prototype.propertyIsEnumerable%');
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forEach([
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'%Object.prototype.propertyIsEnumerable%',
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'Object.prototype.propertyIsEnumerable',
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'%ObjectPrototype.propertyIsEnumerable%',
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'ObjectPrototype.propertyIsEnumerable'
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], function (name) {
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var restore = mockProperty(Object.prototype, 'propertyIsEnumerable', {
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value: function propertyIsEnumerable() {
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return original.apply(this, arguments);
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}
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});
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st.equal(GetIntrinsic(name), original, name + ' yields cached Object.prototype.propertyIsEnumerable');
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restore();
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});
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st.end();
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});
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test('dotted path reports correct error', function (st) {
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st['throws'](function () {
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GetIntrinsic('%NonExistentIntrinsic.prototype.property%');
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}, /%NonExistentIntrinsic%/, 'The base intrinsic of %NonExistentIntrinsic.prototype.property% is %NonExistentIntrinsic%');
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st['throws'](function () {
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GetIntrinsic('%NonExistentIntrinsicPrototype.property%');
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}, /%NonExistentIntrinsicPrototype%/, 'The base intrinsic of %NonExistentIntrinsicPrototype.property% is %NonExistentIntrinsicPrototype%');
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st.end();
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});
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t.end();
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});
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test('accessors', { skip: !$gOPD || typeof Map !== 'function' }, function (t) {
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var actual = $gOPD(Map.prototype, 'size');
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t.ok(actual, 'Map.prototype.size has a descriptor');
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t.equal(typeof actual.get, 'function', 'Map.prototype.size has a getter function');
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t.equal(GetIntrinsic('%Map.prototype.size%'), actual.get, '%Map.prototype.size% yields the getter for it');
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t.equal(GetIntrinsic('Map.prototype.size'), actual.get, 'Map.prototype.size yields the getter for it');
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t.end();
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});
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test('generator functions', { skip: !generatorFns.length }, function (t) {
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var $GeneratorFunction = GetIntrinsic('%GeneratorFunction%');
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var $GeneratorFunctionPrototype = GetIntrinsic('%Generator%');
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var $GeneratorPrototype = GetIntrinsic('%GeneratorPrototype%');
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forEach(generatorFns, function (genFn) {
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var fnName = genFn.name;
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fnName = fnName ? "'" + fnName + "'" : 'genFn';
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t.ok(genFn instanceof $GeneratorFunction, fnName + ' instanceof %GeneratorFunction%');
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t.ok($isProto($GeneratorFunctionPrototype, genFn), '%Generator% is prototype of ' + fnName);
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t.ok($isProto($GeneratorPrototype, genFn.prototype), '%GeneratorPrototype% is prototype of ' + fnName + '.prototype');
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});
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t.end();
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});
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test('async functions', { skip: !asyncFns.length }, function (t) {
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var $AsyncFunction = GetIntrinsic('%AsyncFunction%');
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var $AsyncFunctionPrototype = GetIntrinsic('%AsyncFunctionPrototype%');
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forEach(asyncFns, function (asyncFn) {
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var fnName = asyncFn.name;
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fnName = fnName ? "'" + fnName + "'" : 'asyncFn';
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t.ok(asyncFn instanceof $AsyncFunction, fnName + ' instanceof %AsyncFunction%');
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t.ok($isProto($AsyncFunctionPrototype, asyncFn), '%AsyncFunctionPrototype% is prototype of ' + fnName);
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});
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t.end();
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});
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test('async generator functions', { skip: asyncGenFns.length === 0 }, function (t) {
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var $AsyncGeneratorFunction = GetIntrinsic('%AsyncGeneratorFunction%');
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var $AsyncGeneratorFunctionPrototype = GetIntrinsic('%AsyncGenerator%');
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var $AsyncGeneratorPrototype = GetIntrinsic('%AsyncGeneratorPrototype%');
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forEach(asyncGenFns, function (asyncGenFn) {
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var fnName = asyncGenFn.name;
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fnName = fnName ? "'" + fnName + "'" : 'asyncGenFn';
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t.ok(asyncGenFn instanceof $AsyncGeneratorFunction, fnName + ' instanceof %AsyncGeneratorFunction%');
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t.ok($isProto($AsyncGeneratorFunctionPrototype, asyncGenFn), '%AsyncGenerator% is prototype of ' + fnName);
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t.ok($isProto($AsyncGeneratorPrototype, asyncGenFn.prototype), '%AsyncGeneratorPrototype% is prototype of ' + fnName + '.prototype');
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});
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t.end();
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});
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test('%ThrowTypeError%', function (t) {
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var $ThrowTypeError = GetIntrinsic('%ThrowTypeError%');
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t.equal(typeof $ThrowTypeError, 'function', 'is a function');
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t['throws'](
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$ThrowTypeError,
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TypeError,
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'%ThrowTypeError% throws a TypeError'
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);
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t.end();
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});
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test('allowMissing', { skip: asyncGenFns.length > 0 }, function (t) {
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t['throws'](
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function () { GetIntrinsic('%AsyncGeneratorPrototype%'); },
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TypeError,
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'throws when missing'
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);
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t.equal(
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GetIntrinsic('%AsyncGeneratorPrototype%', true),
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undefined,
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'does not throw when allowMissing'
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);
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t.end();
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});
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