/
pegjs-util.spec.js
199 lines (126 loc) · 4.69 KB
/
pegjs-util.spec.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
"use strict";
const chai = require( "chai" );
const util = require( "pegjs" ).util;
const expect = chai.expect;
describe( "PEG.js Utility API", function () {
describe( "util.convertPasses", function () {
const passes = {
stage1: {
pass1() { },
pass2() { },
pass3() { },
},
stage2: {
pass1() { },
pass2() { },
},
stage3: {
pass1() { },
},
};
function expectPasses( result ) {
expect( result ).to.be.an( "object" );
expect( result.stage1 )
.to.be.an( "array" )
.and.to.have.a.lengthOf( 3 );
expect( result.stage2 )
.to.be.an( "array" )
.and.to.have.a.lengthOf( 2 );
expect( result.stage3 )
.to.be.an( "array" )
.and.to.have.a.lengthOf( 1 );
}
it( "converts a map of stages containing a map of passes", function () {
expectPasses( util.convertPasses( passes ) );
} );
it( "converts a map of stages containing a list of passes", function () {
expectPasses( util.convertPasses( {
stage1: [
passes.stage1.pass1,
passes.stage1.pass2,
passes.stage1.pass3,
],
stage2: passes.stage2,
stage3: [
passes.stage3.pass1,
],
} ) );
} );
} );
describe( "util.clone", function () {
const meta = { name: "pegjs", version: 0.11, util: util };
it( "shallow clones an object", function () {
expect( util.clone( meta ) )
.to.be.an( "object" )
.that.has.own.includes( meta );
} );
it( "cloned properties refrence same value", function () {
expect( util.clone( meta ) )
.to.haveOwnProperty( "util" )
.that.is.a( "object" )
.which.equals( util );
} );
} );
describe( "util.each", function () {
it( "should iterate over an objects properties", function () {
const size = Object.keys( util ).length;
const entries = [];
util.each( util, ( value, key ) => {
entries.push( { key, value } );
} );
expect( entries.length ).to.equal( size );
entries.forEach( entry => {
expect( util )
.to.have.ownProperty( entry.key )
.which.equals( entry.value );
} );
} );
} );
describe( "util.values", function () {
const map = { a: 1, b: 2, c: 3 };
it( "can extract values like Object.values", function () {
expect( util.values( map ) )
.to.be.an( "array" )
.with.a.lengthOf( 3 )
.and.includes.members( [ 1, 2, 3 ] );
} );
it( "can take a transformer, like Array#map", function () {
expect( util.values( map, n => String( n ) ) )
.that.includes.members( [ "1", "2", "3" ] );
} );
} );
describe( "util.extend", function () {
const source = { d: 4, e: 5, f: 6, g: 7, h: 8 };
it( "extend an empty object", function () {
const target = {};
expect( util.extend( target, source ) )
.to.be.an( "object" )
.that.includes.keys( Object.keys( source ) );
expect( util.values( target ) )
.to.include.members( [ 4, 5, 6, 7, 8 ] )
.and.have.a.lengthOf( 5 );
} );
it( "extend an object", function () {
const target = util.extend( {}, source );
const utils = Object.keys( util );
expect( util.extend( target, util ) )
.to.include.keys( utils );
expect( util.values( target ) )
.to.have.a.lengthOf( 5 + utils.length );
} );
} );
describe( "util.map", function () {
const object = { a: 1, b: 2, c: 3, d: 4 };
const result = util.map( object, String );
it( "returns an object, and not an array, unlike Array#map", function () {
expect( result )
.to.be.an( "object" )
.that.includes.keys( Object.keys( object ) );
} );
it( "applies a transformation on each properties value", function () {
util.each( result, property => {
expect( property ).to.be.a( "string" );
} );
} );
} );
} );