How to use Object.getOwnPropertyNames method in chai

Best JavaScript code snippet using chai

test-bi-proxy-ownkeys.js

Source:test-bi-proxy-ownkeys.js

...21        print('Object.keys:', JSON.stringify(Object.keys(obj)));22    } catch (e) {23        print('Object.keys:', e.name);24    }25    // Object.getOwnPropertyNames() on proxy object also triggers 'ownKeys'26    // trap.  If no such trap exists, property names (enumerable or not)27    // of the *proxy* object are listed (not the proxy target).28    try {29        print('Object.getOwnPropertyNames:', JSON.stringify(Object.getOwnPropertyNames(obj)));30    } catch (e) {31        print('Object.getOwnPropertyNames:', e.name);32    }33}34/*===35basic test36enum keys: string:foo string:bar string:quux37Object.keys: ["foo","bar","quux"]38Object.getOwnPropertyNames: ["foo","bar","quux"]39enum keys: string:0 string:1 string:2 string:prop40Object.keys: ["0","1","2","prop"]41Object.getOwnPropertyNames: ["0","1","2","length","prop"]42proxy.foo: 143enum keys: string:foo string:bar string:quux44Object.keys: ["foo","bar","quux"]45Object.getOwnPropertyNames: ["foo","bar","quux"]46enum keys: string:foo string:bar string:quux47Object.keys: ["foo","bar","quux"]48Object.getOwnPropertyNames: ["foo","bar","quux","nonEnum"]49enum keys: string:foo string:bar string:quux50Object.keys: ["foo","bar","quux"]51Object.getOwnPropertyNames: ["foo","bar","quux"]52ownKeys: true true53enum keys: string:foo string:enumProp54ownKeys: true true55Object.keys: ["foo","enumProp"]56ownKeys: true true57Object.getOwnPropertyNames: ["foo","enumProp","nonEnumProp"]58===*/59function basicEnumerationTest() {60    var target;61    var proxy;62    var handler;63    // Simple target object, no proxies.64    target = { foo: 1, bar: 2, quux: [ 1, 2, 3 ] };65    objDump(target);66    target = [ 'foo', 'bar', 'quux' ];67    target.prop = 'propval';68    objDump(target);69    // Simple target object, proxy without 'enumerate' or 'ownKeys'.70    // Enumeration goes through to the proxy target, same applies to71    // Object.keys() and Object.getOwnPropertyNames().72    target = { foo: 1, bar: 2, quux: [ 1, 2, 3 ] };73    proxy = new Proxy(target, {74    });75    print('proxy.foo:', proxy.foo);76    objDump(proxy);77    // Proxy which returns Object.getOwnPropertyNames() from 'getKeys' trap.78    // This causes enumeration to enumerate 'through' to the target object,79    // except that also non-enumerable properties get enumerated.80    target = { foo: 1, bar: 2, quux: [ 1, 2, 3 ] };81    Object.defineProperty(target, 'nonEnum', {82        value: 'nonenumerable', writable: true, enumerable: false, configurable: true83    });84    handler = {85        getKeys: function (targ) {86            print('getKeys:', this === handler, targ === target);87            return Object.getOwnPropertyNames(targ);88        }89    };90    proxy = new Proxy(target, handler);91    objDump(proxy);92    // Proxy which fabricates non-existent keys in 'getKeys'.93    target = { foo: 1, bar: 2, quux: [ 1, 2, 3 ] };94    handler = {95        getKeys: function (targ) {96            print('getKeys:', this === handler, targ === target);97            return [ 'nosuch1', 'nosuch2' ];98        }99    };100    proxy = new Proxy(target, handler);101    objDump(proxy);102    // Proxy which provides a subset of keys in 'ownKeys'.103    // Enumeration has no trap so it operates on the target directly104    // (and only sees enumerable properties).  Object.keys() and105    // Object.getOwnPropertyNames() use the 'ownKeys' trap.106    //107    // NOTE: ES2015 algorithm for Object.keys() is that the trap result list is108    // processed to check whether or not each key is enumerable (the check109    // uses [[GetOwnProperty]]).  Duktape omits this step now, so110    // Object.keys() and Object.getOwnPropertyNames() return the same result111    // for now.  However, the trap result will still be cleaned up so that112    // non-string keys, gaps, etc will be eliminated.113    target = { foo: 1, bar: 2, quux: [ 1, 2, 3 ] };114    Object.defineProperties(target, {115        enumProp: {116            value: 'enumerable', writable: true, enumerable: true, configurable: true,117        },118        nonEnumProp: {119            value: 'non-enumerable', writable: true, enumerable: false, configurable: true,120        }121    });122    handler = {123        ownKeys: function (targ) {124            print('ownKeys:', this === handler, targ === target);125            return [ 'foo', 'enumProp', 'nonEnumProp' ];126        }127    };128    proxy = new Proxy(target, handler);129    objDump(proxy);130}131try {132    print('basic test');133    basicEnumerationTest();134} catch (e) {135    print(e);136}137/*===138trap result test139fake trap result: 0140enum keys: TypeError141Object.keys: TypeError142Object.getOwnPropertyNames: TypeError143fake trap result: 1144enum keys: TypeError145Object.keys: TypeError146Object.getOwnPropertyNames: TypeError147fake trap result: 2148enum keys: TypeError149Object.keys: TypeError150Object.getOwnPropertyNames: TypeError151fake trap result: 3152enum keys: TypeError153Object.keys: TypeError154Object.getOwnPropertyNames: TypeError155fake trap result: 4156enum keys: TypeError157Object.keys: TypeError158Object.getOwnPropertyNames: TypeError159fake trap result: 5160enum keys: TypeError161Object.keys: TypeError162Object.getOwnPropertyNames: TypeError163fake trap result: 6164enum keys: 165Object.keys: []166Object.getOwnPropertyNames: ["foo","bar","quux"]167fake trap result: 7168enum keys: 169Object.keys: []170Object.getOwnPropertyNames: ["foo","bar","quux"]171fake trap result: 8172enum keys: TypeError173Object.keys: TypeError174Object.getOwnPropertyNames: TypeError175fake trap result: 9176enum keys: TypeError177Object.keys: TypeError178Object.getOwnPropertyNames: TypeError179fake trap result: 10180enum keys: TypeError181Object.keys: TypeError182Object.getOwnPropertyNames: TypeError183fake trap result: 11184enum keys: 185Object.keys: []186Object.getOwnPropertyNames: []187===*/188/* Check handling of various trap result checks: return value must be an object189 * but not necessarily an array.  In ES2016 gaps, non-string/symbol values, etc.190 * cause a TypeError.191 */192function trapResultTest() {193    var gappyArray = [];194    gappyArray[0] = 'foo-gappy';195    gappyArray[10] = 'bar-gappy';196    gappyArray[20] = 'quux-gappy';197    gappyArray.length = 30;198    var results = [199        undefined, null, true, false, 123, 'foo',                            // non-object -> TypeError200        [ 'foo', 'bar', 'quux' ],                                            // array201        { '0': 'foo', '1': 'bar', '2': 'quux', '3': 'baz', 'length': 3 },    // array-like object, 'baz' is skipped (over 'length')202        [ 'foo', undefined, null, true, false, 123, 'quux' ],                // non-string values203        { '0': 'foo', '1': 123, '3': 'quux', 'length': 5 },                  // non-string values and gaps, array-like object204        gappyArray,                                                          // array with gaps205        { '0': 'foo', '1': 'bar', '2': 'quux' },                             // object without 'length'206    ];207    results.forEach(function (trapResult, idx) {208        var target = {209        };210        var proxy;211        print('fake trap result:', idx);212        // print(Duktape.enc('jx', trapResult));213        proxy = new Proxy(target, {214            enumerate: function (targ) { print('"enumerate" trap called, not intended in ES2016'); return trapResult; },215            ownKeys: function (targ) { return trapResult; }216        });217        objDump(proxy);218    });219}220try {221    print('trap result test');222    trapResultTest();223} catch (e) {224    print(e.stack || e);225}226/*===227proxy in Object.keys() etc228foo229foo,bar230Symbol(quux),Symbol(baz)231foo,bar,Symbol(quux),Symbol(baz)232===*/233/* Proxy in Object.keys(), Object.getOwnPropertyNames(), etc. */234function proxyInKeysTest() {235    var proxy;236    var target = {};237    Object.defineProperties(target, {238        foo: { value: 'foo-value', enumerable: true },239        bar: { value: 'bar-value', enumerable: false },240        [ Symbol.for('quux') ]: { value: 'quux-value', enumerable: true },241        [ Symbol.for('baz') ]: { value: 'quux-value', enumerable: false }242    });243    var proxy = new Proxy(target, {244    });245    print(Object.keys(proxy).map(String));246    print(Object.getOwnPropertyNames(proxy).map(String));247    print(Object.getOwnPropertySymbols(proxy).map(String));248    print(Reflect.ownKeys(proxy).map(String));249}250try {251    print('proxy in Object.keys() etc');252    proxyInKeysTest();253} catch (e) {254    print(e.stack || e);...

test-bi-typedarray-instance-enum.js

Source:test-bi-typedarray-instance-enum.js

...42    }43    Object.keys(view).forEach(function (k) {44        print('Object.keys:', k);45    });46    Object.getOwnPropertyNames(view).forEach(function (k) {47        print('Object.getOwnPropertyNames:', k);48    });49}50try {51    typedArrayEnumTest();52} catch (e) {53    print(e.stack || e);...

Using AI Code Generation

1var chai = require('chai');2var expect = chai.expect;3describe('Array', function() {4  describe('#indexOf()', function() {5    it('should return -1 when the value is not present', function() {6      expect([1,2,3].indexOf(5)).to.equal(-1);7      expect([1,2,3].indexOf(0)).to.equal(-1);8    });9  });10});11var chai = require('chai');12var expect = chai.expect;13describe('Array', function() {14  describe('#indexOf()', function() {15    it('should return -1 when the value is not present', function() {16      expect([1,2,3].indexOf(5)).to.equal(-1);17      expect([1,2,3].indexOf(0)).to.equal(-1);18    });19  });20});21var chai = require('chai');22var expect = chai.expect;23describe('Array', function() {24  describe('#indexOf()', function() {25    it('should return -1 when the value is not present', function() {26      expect([1,2,3].indexOf(5)).to.equal(-1);27      expect([1,2,3].indexOf(0)).to.equal(-1);28    });29  });30});31var chai = require('chai');32var expect = chai.expect;33describe('Array', function() {34  describe('#indexOf()', function() {35    it('should return -1 when the value is not present', function() {36      expect([1,2,3].indexOf(5)).to.equal(-1);37      expect([1,2,3].indexOf(0)).to.equal(-1);38    });39  });40});41var chai = require('chai');42var expect = chai.expect;43describe('Array', function() {44  describe('#indexOf()', function() {45    it('should return -1 when the value is not present', function() {46      expect([1,2,3].indexOf(5)).to.equal(-1);47      expect([1,2,3].indexOf(0)).to.equal(-1);48    });49  });50});51var chai = require('chai');52var expect = chai.expect;

Using AI Code Generation

1const assert = require('chai').assert;2const _ = require('../index');3describe("#head", () => {4  it("returns 1 for [1, 2, 3]", () => {5    assert.strictEqual(_.head([1, 2, 3]), 1);6  });7});

Using AI Code Generation

1var obj = {2};3var obj = {4};5var obj = {6};7var obj = {8};9var obj = {10};11var obj = {12};13var obj = {14};15var obj = {16};17console.log(Object.getOwnPropertyNames(obj).length === 3 && Object.getOwnPropertyNames

Using AI Code Generation

1var obj = {2};3var prop = Object.getOwnPropertyNames(obj);4console.log(prop);5var obj = {};6var a = Symbol('a');7var b = Symbol.for('b');8obj[a] = 'localSymbol';9obj[b] = 'globalSymbol';10var objectSymbols = Object.getOwnPropertySymbols(obj);11console.log(objectSymbols);12var prototype = {};13var obj = Object.create(prototype);14console.log(Object.getPrototypeOf(obj) === prototype);15console.log(Object.is('foo', 'foo'));16console.log(Object.is({}, {}));17var empty = {};18console.log(Object.isExtensible(empty));19var object1 = {20};21Object.freeze(object1);22console.log(Object.isFrozen(object1));23var object2 = {24};25Object.seal(object2);26console.log(Object.isSealed(object2));27var obj = {28};29console.log(Object.keys(obj));30var object3 = {};31Object.preventExtensions(object3);32console.log(Object.isExtensible(object3));33var object4 = {34};35Object.seal(object4);36object4.property2 = 33;37console.log(object4.property2);38var prototype = {};39var obj = Object.create(prototype);40console.log(Object.getPrototypeOf(obj) === prototype);41var obj = {

Using AI Code Generation

1var obj = {a: 1, b: 2, c: 3};2var obj2 = Object.create(obj);3obj2.d = 4;4var obj = {a: 1, b: 2, c: 3};5var obj2 = Object.create(obj);6obj2.d = 4;7var sym1 = Symbol('a');8var sym2 = Symbol('b');9obj2[sym1] = 'foo';10obj2[sym2] = 'bar';11var obj = {a: 1, b: 2, c: 3};12var obj2 = Object.create(obj);13obj2.d = 4;14var sym1 = Symbol('a');15var sym2 = Symbol('b');16obj2[sym1] = 'foo';17obj2[sym2] = 'bar';18var obj = {a: 1, b: 2, c: 3};19var obj2 = Object.create(obj);20obj2.d = 4;21var sym1 = Symbol('a');22var sym2 = Symbol('b');23obj2[sym1] = 'foo';24obj2[sym2] = 'bar';25var obj = {a: 1, b: 2, c: 3};26var obj2 = Object.create(obj);27obj2.d = 4;28var sym1 = Symbol('a');29var sym2 = Symbol('b');30obj2[sym1] = 'foo';31obj2[sym2] = 'bar';32var obj = {a: 1, b: 2, c: 3};33var obj2 = Object.create(obj

Using AI Code Generation

1var obj = {2};3console.log(Object.getOwnPropertyNames(obj).map(function (k) {4  return obj[k];5}));6var obj = {7};8console.log(Object.getOwnPropertyNames(obj).map(function (k) {9  return obj[k] * 2;10}));11var obj = {12};13console.log(Object.getOwnPropertyNames(obj).map(function (k) {14  return obj[k] * 2;15}).filter(function (v) {16  return v > 3;17}));18var obj = {19};20console.log(Object.getOwnPropertyNames(obj).map(function (k) {21  return obj[k] * 2;22}).filter(function (v) {23  return v > 3;24}).reduce(function (a, b) {25  return a + b;26}));27var obj = {28};29console.log(Object.getOwnPropertyNames(obj).map(function (k) {30  return obj[k] * 2;31}).filter(function (v) {32  return v > 3;33}).reduce(function (a, b) {34  return a + b;35}, 100));36var obj = {37};38console.log(Object.getOwnPropertyNames(obj).map(function (k) {39  return obj[k] * 2;40}).filter(function (v) {41  return v > 3;42}).reduce(function (a, b) {43  return a + b;44}, 100).toString());

Using AI Code Generation

1const assert = require("chai").assert;2const obj = {3};4describe("Test for property", () => {5  it("should return true if property exists", () => {6    assert.isTrue(Object.getOwnPropertyNames(obj).includes("name"));7  });8  it("should return false if property does not exist", () => {9    assert.isFalse(Object.getOwnPropertyNames(obj).includes("address"));10  });11});12const assert = require("chai").assert;13const obj = {14};15describe("Test for property", () => {16  it("should return true if property exists", () => {17    assert.isTrue(Object.keys(obj).includes("name"));18  });19  it("should return false if property does not exist", () => {20    assert.isFalse(Object.keys(obj).includes("address"));21  });22});23const assert = require("chai").assert;24const obj = {25};26describe("Test for property", () => {27  it("should return true if property exists", () => {28    assert.isTrue(Object.getOwnPropertyNames(obj).includes("name"));29  });30  it("should return false if property does not exist", () => {31    assert.isFalse(Object.getOwnPropertyNames(obj).includes("address"));32  });33});34const assert = require("chai").assert;35const obj = {36};37describe("Test for property", () => {38  it("should return true if property exists", () => {39    assert.isTrue(Object.keys(obj).includes("name"));40  });41  it("should return false if property does not exist", () => {42    assert.isFalse(Object.keys(obj).includes("address"));43  });44});

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