68 lines
1.8 KiB
JavaScript
68 lines
1.8 KiB
JavaScript
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'use strict';
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var test = require('tape');
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var inspect = require('object-inspect');
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var v = require('es-value-fixtures');
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var forEach = require('for-each');
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var hasOwn = require('hasown');
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var shimUnscopables = require('../');
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var sortSymbols = function (a, b) {
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return inspect(a).localeCompare(inspect(b));
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};
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test('shimUnscopables', function (t) {
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t.equal(typeof shimUnscopables, 'function', 'is a function');
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forEach(v.nonStrings, function (notNonEmptyString) {
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t['throws'](
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function () { shimUnscopables(notNonEmptyString); },
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TypeError,
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inspect(notNonEmptyString) + ' is not a non-empty String'
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);
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});
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t['throws'](
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function () { shimUnscopables('x'); },
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TypeError,
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inspect('x') + ' is not on Array.prototype'
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);
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t.test('no symbols', { skip: typeof Symbol === 'function' }, function (st) {
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st.doesNotThrow(function () { shimUnscopables('forEach'); });
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st.end();
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});
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t.test('symbols, no unscopables', { skip: typeof Symbol !== 'function' || Symbol.unscopables }, function (st) {
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st.deepEqual(Object.getOwnPropertySymbols(Array.prototype), [Symbol.iterator]);
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shimUnscopables('forEach');
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st.deepEqual(Object.getOwnPropertySymbols(Array.prototype), [Symbol.iterator]);
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st.end();
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});
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t.test('Symbol.unscopables', { skip: typeof Symbol !== 'function' || !Symbol.unscopables }, function (st) {
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st.deepEqual(
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Object.getOwnPropertySymbols(Array.prototype).sort(sortSymbols),
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[Symbol.iterator, Symbol.unscopables]
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);
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st.notOk(hasOwn(Array.prototype[Symbol.unscopables], 'forEach'), 'unscopables map lacks forEach');
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shimUnscopables('forEach');
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st.deepEqual(
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Object.getOwnPropertySymbols(Array.prototype).sort(sortSymbols),
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[Symbol.iterator, Symbol.unscopables]
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);
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st.equal(Array.prototype[Symbol.unscopables].forEach, true, 'unscopables map has forEach');
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st.end();
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});
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t.end();
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});
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