1'use strict';
2
3require('../common');
4const assert = require('assert');
5
6const rangeBuffer = Buffer.from('abc');
7
8// If start >= buffer's length, empty string will be returned
9assert.strictEqual(rangeBuffer.toString('ascii', 3), '');
10assert.strictEqual(rangeBuffer.toString('ascii', +Infinity), '');
11assert.strictEqual(rangeBuffer.toString('ascii', 3.14, 3), '');
12assert.strictEqual(rangeBuffer.toString('ascii', 'Infinity', 3), '');
13
14// If end <= 0, empty string will be returned
15assert.strictEqual(rangeBuffer.toString('ascii', 1, 0), '');
16assert.strictEqual(rangeBuffer.toString('ascii', 1, -1.2), '');
17assert.strictEqual(rangeBuffer.toString('ascii', 1, -100), '');
18assert.strictEqual(rangeBuffer.toString('ascii', 1, -Infinity), '');
19
20// If start < 0, start will be taken as zero
21assert.strictEqual(rangeBuffer.toString('ascii', -1, 3), 'abc');
22assert.strictEqual(rangeBuffer.toString('ascii', -1.99, 3), 'abc');
23assert.strictEqual(rangeBuffer.toString('ascii', -Infinity, 3), 'abc');
24assert.strictEqual(rangeBuffer.toString('ascii', '-1', 3), 'abc');
25assert.strictEqual(rangeBuffer.toString('ascii', '-1.99', 3), 'abc');
26assert.strictEqual(rangeBuffer.toString('ascii', '-Infinity', 3), 'abc');
27
28// If start is an invalid integer, start will be taken as zero
29assert.strictEqual(rangeBuffer.toString('ascii', 'node.js', 3), 'abc');
30assert.strictEqual(rangeBuffer.toString('ascii', {}, 3), 'abc');
31assert.strictEqual(rangeBuffer.toString('ascii', [], 3), 'abc');
32assert.strictEqual(rangeBuffer.toString('ascii', NaN, 3), 'abc');
33assert.strictEqual(rangeBuffer.toString('ascii', null, 3), 'abc');
34assert.strictEqual(rangeBuffer.toString('ascii', undefined, 3), 'abc');
35assert.strictEqual(rangeBuffer.toString('ascii', false, 3), 'abc');
36assert.strictEqual(rangeBuffer.toString('ascii', '', 3), 'abc');
37
38// But, if start is an integer when coerced, then it will be coerced and used.
39assert.strictEqual(rangeBuffer.toString('ascii', '-1', 3), 'abc');
40assert.strictEqual(rangeBuffer.toString('ascii', '1', 3), 'bc');
41assert.strictEqual(rangeBuffer.toString('ascii', '-Infinity', 3), 'abc');
42assert.strictEqual(rangeBuffer.toString('ascii', '3', 3), '');
43assert.strictEqual(rangeBuffer.toString('ascii', Number(3), 3), '');
44assert.strictEqual(rangeBuffer.toString('ascii', '3.14', 3), '');
45assert.strictEqual(rangeBuffer.toString('ascii', '1.99', 3), 'bc');
46assert.strictEqual(rangeBuffer.toString('ascii', '-1.99', 3), 'abc');
47assert.strictEqual(rangeBuffer.toString('ascii', 1.99, 3), 'bc');
48assert.strictEqual(rangeBuffer.toString('ascii', true, 3), 'bc');
49
50// If end > buffer's length, end will be taken as buffer's length
51assert.strictEqual(rangeBuffer.toString('ascii', 0, 5), 'abc');
52assert.strictEqual(rangeBuffer.toString('ascii', 0, 6.99), 'abc');
53assert.strictEqual(rangeBuffer.toString('ascii', 0, Infinity), 'abc');
54assert.strictEqual(rangeBuffer.toString('ascii', 0, '5'), 'abc');
55assert.strictEqual(rangeBuffer.toString('ascii', 0, '6.99'), 'abc');
56assert.strictEqual(rangeBuffer.toString('ascii', 0, 'Infinity'), 'abc');
57
58// If end is an invalid integer, end will be taken as buffer's length
59assert.strictEqual(rangeBuffer.toString('ascii', 0, 'node.js'), '');
60assert.strictEqual(rangeBuffer.toString('ascii', 0, {}), '');
61assert.strictEqual(rangeBuffer.toString('ascii', 0, NaN), '');
62assert.strictEqual(rangeBuffer.toString('ascii', 0, undefined), 'abc');
63assert.strictEqual(rangeBuffer.toString('ascii', 0), 'abc');
64assert.strictEqual(rangeBuffer.toString('ascii', 0, null), '');
65assert.strictEqual(rangeBuffer.toString('ascii', 0, []), '');
66assert.strictEqual(rangeBuffer.toString('ascii', 0, false), '');
67assert.strictEqual(rangeBuffer.toString('ascii', 0, ''), '');
68
69// But, if end is an integer when coerced, then it will be coerced and used.
70assert.strictEqual(rangeBuffer.toString('ascii', 0, '-1'), '');
71assert.strictEqual(rangeBuffer.toString('ascii', 0, '1'), 'a');
72assert.strictEqual(rangeBuffer.toString('ascii', 0, '-Infinity'), '');
73assert.strictEqual(rangeBuffer.toString('ascii', 0, '3'), 'abc');
74assert.strictEqual(rangeBuffer.toString('ascii', 0, Number(3)), 'abc');
75assert.strictEqual(rangeBuffer.toString('ascii', 0, '3.14'), 'abc');
76assert.strictEqual(rangeBuffer.toString('ascii', 0, '1.99'), 'a');
77assert.strictEqual(rangeBuffer.toString('ascii', 0, '-1.99'), '');
78assert.strictEqual(rangeBuffer.toString('ascii', 0, 1.99), 'a');
79assert.strictEqual(rangeBuffer.toString('ascii', 0, true), 'a');
80
81// Try toString() with an object as an encoding
82assert.strictEqual(rangeBuffer.toString({ toString: function() {
83  return 'ascii';
84} }), 'abc');
85
86// Try toString() with 0 and null as the encoding
87assert.throws(() => {
88  rangeBuffer.toString(0, 1, 2);
89}, {
90  code: 'ERR_UNKNOWN_ENCODING',
91  name: 'TypeError',
92  message: 'Unknown encoding: 0'
93});
94assert.throws(() => {
95  rangeBuffer.toString(null, 1, 2);
96}, {
97  code: 'ERR_UNKNOWN_ENCODING',
98  name: 'TypeError',
99  message: 'Unknown encoding: null'
100});
101