1 | 'use strict';
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2 |
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3 | var test = require('tape');
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4 | var inspect = require('object-inspect');
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5 | var SaferBuffer = require('safer-buffer').Buffer;
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6 | var forEach = require('for-each');
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7 | var utils = require('../lib/utils');
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8 |
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9 | test('merge()', function (t) {
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10 | t.deepEqual(utils.merge(null, true), [null, true], 'merges true into null');
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11 |
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12 | t.deepEqual(utils.merge(null, [42]), [null, 42], 'merges null into an array');
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13 |
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14 | t.deepEqual(utils.merge({ a: 'b' }, { a: 'c' }), { a: ['b', 'c'] }, 'merges two objects with the same key');
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15 |
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16 | var oneMerged = utils.merge({ foo: 'bar' }, { foo: { first: '123' } });
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17 | t.deepEqual(oneMerged, { foo: ['bar', { first: '123' }] }, 'merges a standalone and an object into an array');
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18 |
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19 | var twoMerged = utils.merge({ foo: ['bar', { first: '123' }] }, { foo: { second: '456' } });
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20 | t.deepEqual(twoMerged, { foo: { 0: 'bar', 1: { first: '123' }, second: '456' } }, 'merges a standalone and two objects into an array');
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21 |
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22 | var sandwiched = utils.merge({ foo: ['bar', { first: '123', second: '456' }] }, { foo: 'baz' });
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23 | t.deepEqual(sandwiched, { foo: ['bar', { first: '123', second: '456' }, 'baz'] }, 'merges an object sandwiched by two standalones into an array');
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24 |
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25 | var nestedArrays = utils.merge({ foo: ['baz'] }, { foo: ['bar', 'xyzzy'] });
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26 | t.deepEqual(nestedArrays, { foo: ['baz', 'bar', 'xyzzy'] });
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27 |
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28 | var noOptionsNonObjectSource = utils.merge({ foo: 'baz' }, 'bar');
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29 | t.deepEqual(noOptionsNonObjectSource, { foo: 'baz', bar: true });
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30 |
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31 | t.test(
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32 | 'avoids invoking array setters unnecessarily',
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33 | { skip: typeof Object.defineProperty !== 'function' },
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34 | function (st) {
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35 | var setCount = 0;
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36 | var getCount = 0;
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37 | var observed = [];
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38 | Object.defineProperty(observed, 0, {
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39 | get: function () {
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40 | getCount += 1;
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41 | return { bar: 'baz' };
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42 | },
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43 | set: function () { setCount += 1; }
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44 | });
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45 | utils.merge(observed, [null]);
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46 | st.equal(setCount, 0);
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47 | st.equal(getCount, 1);
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48 | observed[0] = observed[0];
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49 | st.equal(setCount, 1);
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50 | st.equal(getCount, 2);
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51 | st.end();
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52 | }
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53 | );
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54 |
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55 | t.end();
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56 | });
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57 |
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58 | test('assign()', function (t) {
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59 | var target = { a: 1, b: 2 };
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60 | var source = { b: 3, c: 4 };
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61 | var result = utils.assign(target, source);
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62 |
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63 | t.equal(result, target, 'returns the target');
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64 | t.deepEqual(target, { a: 1, b: 3, c: 4 }, 'target and source are merged');
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65 | t.deepEqual(source, { b: 3, c: 4 }, 'source is untouched');
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66 |
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67 | t.end();
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68 | });
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69 |
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70 | test('combine()', function (t) {
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71 | t.test('both arrays', function (st) {
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72 | var a = [1];
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73 | var b = [2];
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74 | var combined = utils.combine(a, b);
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75 |
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76 | st.deepEqual(a, [1], 'a is not mutated');
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77 | st.deepEqual(b, [2], 'b is not mutated');
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78 | st.notEqual(a, combined, 'a !== combined');
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79 | st.notEqual(b, combined, 'b !== combined');
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80 | st.deepEqual(combined, [1, 2], 'combined is a + b');
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81 |
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82 | st.end();
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83 | });
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84 |
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85 | t.test('one array, one non-array', function (st) {
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86 | var aN = 1;
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87 | var a = [aN];
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88 | var bN = 2;
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89 | var b = [bN];
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90 |
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91 | var combinedAnB = utils.combine(aN, b);
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92 | st.deepEqual(b, [bN], 'b is not mutated');
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93 | st.notEqual(aN, combinedAnB, 'aN + b !== aN');
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94 | st.notEqual(a, combinedAnB, 'aN + b !== a');
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95 | st.notEqual(bN, combinedAnB, 'aN + b !== bN');
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96 | st.notEqual(b, combinedAnB, 'aN + b !== b');
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97 | st.deepEqual([1, 2], combinedAnB, 'first argument is array-wrapped when not an array');
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98 |
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99 | var combinedABn = utils.combine(a, bN);
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100 | st.deepEqual(a, [aN], 'a is not mutated');
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101 | st.notEqual(aN, combinedABn, 'a + bN !== aN');
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102 | st.notEqual(a, combinedABn, 'a + bN !== a');
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103 | st.notEqual(bN, combinedABn, 'a + bN !== bN');
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104 | st.notEqual(b, combinedABn, 'a + bN !== b');
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105 | st.deepEqual([1, 2], combinedABn, 'second argument is array-wrapped when not an array');
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106 |
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107 | st.end();
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108 | });
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109 |
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110 | t.test('neither is an array', function (st) {
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111 | var combined = utils.combine(1, 2);
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112 | st.notEqual(1, combined, '1 + 2 !== 1');
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113 | st.notEqual(2, combined, '1 + 2 !== 2');
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114 | st.deepEqual([1, 2], combined, 'both arguments are array-wrapped when not an array');
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115 |
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116 | st.end();
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117 | });
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118 |
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119 | t.end();
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120 | });
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121 |
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122 | test('isBuffer()', function (t) {
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123 | forEach([null, undefined, true, false, '', 'abc', 42, 0, NaN, {}, [], function () {}, /a/g], function (x) {
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124 | t.equal(utils.isBuffer(x), false, inspect(x) + ' is not a buffer');
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125 | });
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126 |
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127 | var fakeBuffer = { constructor: Buffer };
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128 | t.equal(utils.isBuffer(fakeBuffer), false, 'fake buffer is not a buffer');
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129 |
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130 | var saferBuffer = SaferBuffer.from('abc');
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131 | t.equal(utils.isBuffer(saferBuffer), true, 'SaferBuffer instance is a buffer');
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132 |
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133 | var buffer = Buffer.from && Buffer.alloc ? Buffer.from('abc') : new Buffer('abc');
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134 | t.equal(utils.isBuffer(buffer), true, 'real Buffer instance is a buffer');
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135 | t.end();
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136 | });
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