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39 lines
1.4 KiB
39 lines
1.4 KiB
'use strict'; |
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var test = require('tape'); |
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var isString = require('../'); |
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var hasToStringTag = require('has-tostringtag/shams')(); |
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test('not Strings', function (t) { |
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t.notOk(isString(), 'undefined is not String'); |
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t.notOk(isString(null), 'null is not String'); |
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t.notOk(isString(false), 'false is not String'); |
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t.notOk(isString(true), 'true is not String'); |
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t.notOk(isString([]), 'array is not String'); |
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t.notOk(isString({}), 'object is not String'); |
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t.notOk(isString(function () {}), 'function is not String'); |
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t.notOk(isString(/a/g), 'regex literal is not String'); |
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t.notOk(isString(new RegExp('a', 'g')), 'regex object is not String'); |
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t.notOk(isString(new Date()), 'new Date() is not String'); |
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t.notOk(isString(42), 'number is not String'); |
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t.notOk(isString(Object(42)), 'number object is not String'); |
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t.notOk(isString(NaN), 'NaN is not String'); |
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t.notOk(isString(Infinity), 'Infinity is not String'); |
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t.end(); |
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}); |
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test('@@toStringTag', { skip: !hasToStringTag }, function (t) { |
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var fakeString = { |
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toString: function () { return '7'; }, |
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valueOf: function () { return '42'; } |
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}; |
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fakeString[Symbol.toStringTag] = 'String'; |
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t.notOk(isString(fakeString), 'fake String with @@toStringTag "String" is not String'); |
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t.end(); |
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}); |
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test('Strings', function (t) { |
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t.ok(isString('foo'), 'string primitive is String'); |
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t.ok(isString(Object('foo')), 'string object is String'); |
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t.end(); |
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});
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