lepu-test-platform-web/node_modules/object-is/test/index.js

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'use strict';
var test = require('tape');
var hasSymbols = require('has-symbols')();
var is = require('../');
test('works with primitives', function (t) {
t.ok(is(), 'two absent args are the same');
t.ok(is(undefined), 'undefined & one absent arg are the same');
t.ok(is(undefined, undefined), 'undefined is undefined');
t.ok(is(null, null), 'null is null');
t.ok(is(true, true), 'true is true');
t.ok(is(false, false), 'false is false');
t.notOk(is(true, false), 'true is not false');
t.end();
});
test('works with NaN', function (t) {
t.ok(is(NaN, NaN), 'NaN is NaN');
t.end();
});
test('differentiates zeroes', function (t) {
t.ok(is(0, 0), '+0 is +0');
t.ok(is(-0, -0), '-0 is -0');
t.notOk(is(0, -0), '+0 is not -0');
t.end();
});
test('nonzero numbers', function (t) {
t.ok(is(Infinity, Infinity), 'infinity is infinity');
t.ok(is(-Infinity, -Infinity), 'infinity is infinity');
t.ok(is(42, 42), '42 is 42');
t.notOk(is(42, -42), '42 is not -42');
t.end();
});
test('strings', function (t) {
t.ok(is('', ''), 'empty string is empty string');
t.ok(is('foo', 'foo'), 'string is string');
t.notOk(is('foo', 'bar'), 'string is not different string');
t.end();
});
test('objects', function (t) {
var obj = {};
t.ok(is(obj, obj), 'object is same object');
t.notOk(is(obj, {}), 'object is not different object');
t.end();
});
test('Symbols', { skip: !hasSymbols }, function (t) {
t.ok(is(Symbol.iterator, Symbol.iterator), 'Symbol.iterator is itself');
t.notOk(is(Symbol(), Symbol()), 'different Symbols are not equal');
t.notOk(is(Symbol.iterator, Object(Symbol.iterator)), 'Symbol.iterator is not boxed form of itself');
t.end();
});