1 | 'use strict';
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2 |
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3 | var hasToStringTag = require('has-tostringtag/shams')();
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4 | var forEach = require('foreach');
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5 | var test = require('tape');
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6 | var isRegex = require('..');
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7 |
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8 | test('not regexes', function (t) {
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9 | t.notOk(isRegex(), 'undefined is not regex');
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10 | t.notOk(isRegex(null), 'null is not regex');
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11 | t.notOk(isRegex(false), 'false is not regex');
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12 | t.notOk(isRegex(true), 'true is not regex');
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13 | t.notOk(isRegex(42), 'number is not regex');
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14 | t.notOk(isRegex('foo'), 'string is not regex');
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15 | t.notOk(isRegex([]), 'array is not regex');
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16 | t.notOk(isRegex({}), 'object is not regex');
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17 | t.notOk(isRegex(function () {}), 'function is not regex');
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18 | t.end();
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19 | });
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20 |
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21 | test('@@toStringTag', { skip: !hasToStringTag }, function (t) {
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22 | var regex = /a/g;
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23 | var fakeRegex = {
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24 | toString: function () { return String(regex); },
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25 | valueOf: function () { return regex; }
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26 | };
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27 | fakeRegex[Symbol.toStringTag] = 'RegExp';
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28 | t.notOk(isRegex(fakeRegex), 'fake RegExp with @@toStringTag "RegExp" is not regex');
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29 | t.end();
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30 | });
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31 |
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32 | test('regexes', function (t) {
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33 | t.ok(isRegex(/a/g), 'regex literal is regex');
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34 | t.ok(isRegex(new RegExp('a', 'g')), 'regex object is regex');
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35 | t.end();
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36 | });
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37 |
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38 | test('does not mutate regexes', function (t) {
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39 | t.test('lastIndex is a marker object', function (st) {
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40 | var regex = /a/;
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41 | var marker = {};
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42 | regex.lastIndex = marker;
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43 | st.equal(regex.lastIndex, marker, 'lastIndex is the marker object');
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44 | st.ok(isRegex(regex), 'is regex');
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45 | st.equal(regex.lastIndex, marker, 'lastIndex is the marker object after isRegex');
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46 | st.end();
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47 | });
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48 |
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49 | t.test('lastIndex is nonzero', function (st) {
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50 | var regex = /a/;
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51 | regex.lastIndex = 3;
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52 | st.equal(regex.lastIndex, 3, 'lastIndex is 3');
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53 | st.ok(isRegex(regex), 'is regex');
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54 | st.equal(regex.lastIndex, 3, 'lastIndex is 3 after isRegex');
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55 | st.end();
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56 | });
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57 |
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58 | t.end();
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59 | });
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60 |
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61 | test('does not perform operations observable to Proxies', { skip: typeof Proxy !== 'function' }, function (t) {
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62 | var Handler = function () {
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63 | this.trapCalls = [];
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64 | };
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65 |
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66 | forEach([
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67 | 'defineProperty',
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68 | 'deleteProperty',
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69 | 'get',
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70 | 'getOwnPropertyDescriptor',
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71 | 'getPrototypeOf',
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72 | 'has',
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73 | 'isExtensible',
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74 | 'ownKeys',
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75 | 'preventExtensions',
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76 | 'set',
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77 | 'setPrototypeOf'
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78 | ], function (trapName) {
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79 | Handler.prototype[trapName] = function () {
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80 | this.trapCalls.push(trapName);
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81 | return Reflect[trapName].apply(Reflect, arguments);
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82 | };
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83 | });
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84 |
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85 | t.test('proxy of object', function (st) {
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86 | var handler = new Handler();
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87 | var proxy = new Proxy({ lastIndex: 0 }, handler);
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88 |
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89 | st.equal(isRegex(proxy), false, 'proxy of plain object is not regex');
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90 | st.deepEqual(handler.trapCalls, ['getOwnPropertyDescriptor'], 'no unexpected proxy traps were triggered');
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91 | st.end();
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92 | });
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93 |
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94 | t.test('proxy of RegExp instance', function (st) {
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95 | var handler = new Handler();
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96 | var proxy = new Proxy(/a/, handler);
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97 |
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98 | st.equal(isRegex(proxy), false, 'proxy of RegExp instance is not regex');
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99 | st.deepEqual(handler.trapCalls, ['getOwnPropertyDescriptor'], 'no unexpected proxy traps were triggered');
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100 | st.end();
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101 | });
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102 |
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103 | t.end();
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104 | });
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