38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
'use strict';
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var trimStart = require('../');
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trimStart.shim();
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var runTests = require('./tests');
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var test = require('tape');
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var defineProperties = require('define-properties');
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var callBind = require('es-abstract/helpers/callBind');
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var isEnumerable = Object.prototype.propertyIsEnumerable;
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var functionsHaveNames = require('functions-have-names')();
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test('shimmed', function (t) {
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t.equal(String.prototype.trimStart.length, 0, 'String#trimStart has a length of 0');
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t.test('Function name', { skip: !functionsHaveNames }, function (st) {
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st.equal((/^(?:trimLeft|trimStart)$/).test(String.prototype.trimStart.name), true, 'String#trimStart has name "trimLeft" or "trimStart"');
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st.end();
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});
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t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
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et.equal(false, isEnumerable.call(String.prototype, 'trimStart'), 'String#trimStart is not enumerable');
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et.end();
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});
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var supportsStrictMode = (function () { return typeof this === 'undefined'; }());
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t.test('bad string/this value', { skip: !supportsStrictMode }, function (st) {
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st['throws'](function () { return trimStart(undefined, 'a'); }, TypeError, 'undefined is not an object');
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st['throws'](function () { return trimStart(null, 'a'); }, TypeError, 'null is not an object');
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st.end();
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});
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runTests(callBind(String.prototype.trimStart), t);
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t.end();
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});
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