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102 lines
3.7 KiB
102 lines
3.7 KiB
4 years ago
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describe('global methods', function () {
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'use strict';
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var foo = function foo() {};
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var functionsHaveNames = foo.name === 'foo';
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var ifFunctionsHaveNamesIt = functionsHaveNames ? it : xit;
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var hasSymbols = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
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var ifSymbolsIt = hasSymbols ? it : xit;
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var is = function (x, y) {
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if (x === 0 && y === 0) {
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return 1 / x === 1 / y;
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}
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return x === y;
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};
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describe('parseInt', function () {
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/* eslint-disable radix */
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ifFunctionsHaveNamesIt('has the right name', function () {
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expect(parseInt.name).toBe('parseInt');
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});
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it('accepts a radix', function () {
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for (var i = 2; i <= 36; ++i) {
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expect(parseInt('10', i)).toBe(i);
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}
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});
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it('defaults the radix to 10 when the number does not start with 0x or 0X', function () {
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[
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'01',
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'08',
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'10',
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'42'
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].forEach(function (str) {
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expect(parseInt(str)).toBe(parseInt(str, 10));
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});
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});
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it('defaults the radix to 16 when the number starts with 0x or 0X', function () {
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expect(parseInt('0x16')).toBe(parseInt('0x16', 16));
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expect(parseInt('0X16')).toBe(parseInt('0X16', 16));
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});
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it('ignores leading whitespace', function () {
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expect(parseInt(' 0x16')).toBe(parseInt('0x16', 16));
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expect(parseInt(' 42')).toBe(parseInt('42', 10));
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expect(parseInt(' 08')).toBe(parseInt('08', 10));
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var ws = '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003'
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+ '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028'
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+ '\u2029\uFEFF';
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expect(parseInt(ws + '08')).toBe(parseInt('08', 10));
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expect(parseInt(ws + '0x16')).toBe(parseInt('0x16', 16));
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});
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it('defaults the radix properly when not a true number', function () {
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var fakeZero = { valueOf: function () { return 0; } };
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expect(parseInt('08', fakeZero)).toBe(parseInt('08', 10));
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expect(parseInt('0x16', fakeZero)).toBe(parseInt('0x16', 16));
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});
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it('allows sign-prefixed hex values', function () {
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expect(parseInt('-0xF')).toBe(-15);
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expect(parseInt('-0xF', 16)).toBe(-15);
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expect(parseInt('+0xF')).toBe(15);
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expect(parseInt('+0xF', 16)).toBe(15);
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});
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it('NaN parsing', function () {
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expect(parseInt()).toBeNaN();
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expect(parseInt(undefined)).toBeNaN();
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expect(parseInt(null)).toBeNaN();
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expect(parseInt(NaN)).toBeNaN();
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});
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ifSymbolsIt('throws on symbols', function () {
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expect(function () { parseInt(Symbol('')); }).toThrow();
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expect(function () { parseInt(Object(Symbol(''))); }).toThrow();
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});
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/* eslint-enable radix */
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});
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describe('parseFloat()', function () {
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it('works with zeroes', function () {
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expect(is(parseFloat('0'), 0) ? '+0' : '-0').toBe('+0');
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expect(is(parseFloat(' 0'), 0) ? '+0' : '-0').toBe('+0');
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expect(is(parseFloat('+0'), 0) ? '+0' : '-0').toBe('+0');
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expect(is(parseFloat(' +0'), 0) ? '+0' : '-0').toBe('+0');
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expect(is(parseFloat('-0'), -0) ? '-0' : '+0').toBe('-0');
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expect(is(parseFloat(' -0'), -0) ? '-0' : '+0').toBe('-0');
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});
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it('NaN parsing', function () {
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expect(parseFloat(undefined)).toBeNaN();
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expect(parseFloat(null)).toBeNaN();
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expect(parseFloat(NaN)).toBeNaN();
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});
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});
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});
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