41 lines
1.4 KiB
JavaScript
41 lines
1.4 KiB
JavaScript
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'use strict';
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var test = require('tape');
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var isNumber = require('../');
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var hasToStringTag = require('has-tostringtag/shams')();
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test('not Numbers', function (t) {
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// @ts-expect-error
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t.notOk(isNumber(), 'undefined is not Number');
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t.notOk(isNumber(null), 'null is not Number');
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t.notOk(isNumber(false), 'false is not Number');
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t.notOk(isNumber(true), 'true is not Number');
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t.notOk(isNumber('foo'), 'string is not Number');
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t.notOk(isNumber([]), 'array is not Number');
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t.notOk(isNumber({}), 'object is not Number');
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t.notOk(isNumber(function () {}), 'function is not Number');
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t.notOk(isNumber(/a/g), 'regex literal is not Number');
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t.notOk(isNumber(new RegExp('a', 'g')), 'regex object is not Number');
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t.notOk(isNumber(new Date()), 'new Date() is not Number');
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t.end();
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});
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test('@@toStringTag', { skip: !hasToStringTag }, function (t) {
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/** @type {{ toString(): string; valueOf(): number; [Symbol.toStringTag]?: string; }} */
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var fakeNumber = {
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toString: function () { return '7'; },
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valueOf: function () { return 42; }
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};
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fakeNumber[Symbol.toStringTag] = 'Number';
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t.notOk(isNumber(fakeNumber), 'fake Number with @@toStringTag "Number" is not Number');
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t.end();
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});
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test('Numbers', function (t) {
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t.ok(isNumber(42), 'number is Number');
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t.ok(isNumber(Object(42)), 'number object is Number');
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t.ok(isNumber(NaN), 'NaN is Number');
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t.ok(isNumber(Infinity), 'Infinity is Number');
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t.end();
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});
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