83 lines
2.7 KiB
JavaScript
83 lines
2.7 KiB
JavaScript
'use strict';
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var keys = require('object-keys');
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var map = require('array.prototype.map');
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var define = require('define-properties');
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var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
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module.exports = function (entries, t) {
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var a = {};
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var b = {};
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var c = {};
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var obj = { a: a, b: b, c: c };
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t.deepEqual(entries(obj), [['a', a], ['b', b], ['c', c]], 'basic support');
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t.deepEqual(entries({ a: a, b: a, c: c }), [['a', a], ['b', a], ['c', c]], 'duplicate entries are included');
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t.test('entries are in the same order as keys', function (st) {
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var object = { a: a, b: b };
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object[0] = 3;
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object.c = c;
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object[1] = 4;
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delete object[0];
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var objKeys = keys(object);
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var objEntries = map(objKeys, function (key) {
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return [key, object[key]];
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});
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st.deepEqual(entries(object), objEntries, 'entries match key order');
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st.end();
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});
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t.test('non-enumerable properties are omitted', { skip: !Object.defineProperty }, function (st) {
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var object = { a: a, b: b };
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Object.defineProperty(object, 'c', { enumerable: false, value: c });
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st.deepEqual(entries(object), [['a', a], ['b', b]], 'non-enumerable property‘s value is omitted');
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st.end();
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});
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t.test('inherited properties are omitted', function (st) {
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var F = function G() {};
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F.prototype.a = a;
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var f = new F();
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f.b = b;
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st.deepEqual(entries(f), [['b', b]], 'only own properties are included');
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st.end();
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});
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t.test('Symbol properties are omitted', { skip: !hasSymbols }, function (st) {
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var object = { a: a, b: b, c: c };
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var enumSym = Symbol('enum');
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var nonEnumSym = Symbol('non enum');
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object[enumSym] = enumSym;
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object.d = enumSym;
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Object.defineProperty(object, nonEnumSym, { enumerable: false, value: nonEnumSym });
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st.deepEqual(entries(object), [['a', a], ['b', b], ['c', c], ['d', enumSym]], 'symbol properties are omitted');
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st.end();
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});
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t.test('not-yet-visited keys deleted on [[Get]] must not show up in output', { skip: !define.supportsDescriptors }, function (st) {
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var o = { a: 1, b: 2, c: 3 };
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Object.defineProperty(o, 'a', {
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get: function () {
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delete this.b;
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return 1;
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}
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});
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st.deepEqual(entries(o), [['a', 1], ['c', 3]], 'when "b" is deleted prior to being visited, it should not show up');
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st.end();
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});
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t.test('not-yet-visited keys made non-enumerable on [[Get]] must not show up in output', { skip: !define.supportsDescriptors }, function (st) {
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var o = { a: 'A', b: 'B' };
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Object.defineProperty(o, 'a', {
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get: function () {
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Object.defineProperty(o, 'b', { enumerable: false });
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return 'A';
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}
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});
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st.deepEqual(entries(o), [['a', 'A']], 'when "b" is made non-enumerable prior to being visited, it should not show up');
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st.end();
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});
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};
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