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
|
"use strict";
const assert = require ('assert')
const printableCharacters = require (process.env.PRINTABLE_CHARACTERS_TEST_FILE)
// cannot use spread operator in tests due to Node v4 compatibility requirements...
const strlen = printableCharacters.strlen
, isBlank = printableCharacters.isBlank
, blank = printableCharacters.blank
, ansiEscapeCodes = printableCharacters.ansiEscapeCodes
, zeroWidthCharacters = printableCharacters.zeroWidthCharacters
, partition = printableCharacters.partition
, first = printableCharacters.first
describe ('printable-characters', () => {
it ('determines visible length', () => {
assert.equal (strlen ('💩'), 1)
//assert.equal (strlen ('👩❤️💋👩'), 1) // FAILING, see http://blog.jonnew.com/posts/poo-dot-length-equals-two for possible solution
assert.equal (strlen ('❤️'), 1)
assert.equal (strlen ('foo bar'), 7)
assert.equal (strlen ('\u001b[106mfoo bar\u001b[49m'), 7)
})
it ('detects blank text', () => {
assert (!isBlank ('💩'))
assert (!isBlank ('foobar'))
assert ( isBlank ('\u001b[106m \t \t \n \u001b[49m'))
})
it ('matches zero-width characters and ANSI escape codes', () => {
let s = '\u001b[106m' + 'foo' + '\n\n' + 'bar' + '\u001b[49m'
assert (s = s.replace (ansiEscapeCodes, ''), 'foo\n\nbar')
assert ( s.replace (zeroWidthCharacters, ''), 'foobar')
})
it ('obtains blank string of the same width', () => {
assert.equal (blank ('💩'), ' ')
//assert.equal (blank ('👩❤️💋👩'), ' ') // FAILING, see http://blog.jonnew.com/posts/poo-dot-length-equals-two for possible solution
assert.equal (blank ('❤️'), ' ')
assert.equal (blank ('foo'), ' ')
assert.equal (blank ('\n'), '\n')
assert.equal (blank ('\t'), '\t')
assert.equal (blank ('\tfoo \nfoo'), '\t \n ')
assert.equal (blank ('\u001b[22m\u001b[1mfoo \t\u001b[39m\u001b[22m'), ' \t')
})
it ('extracts invisible parts followed by visible ones', () => {
assert.deepEqual (partition (''), [ ])
assert.deepEqual (partition ('foo'), [['', 'foo'] ])
assert.deepEqual (partition ('\u001b[1mfoo'), [['\u001b[1m', 'foo'] ])
assert.deepEqual (partition ('\u001b[1mfoo\u0000bar'), [['\u001b[1m', 'foo'], ['\u0000', 'bar'] ])
assert.deepEqual (partition ('\u001b[1mfoo\u0000bar\n'), [['\u001b[1m', 'foo'], ['\u0000', 'bar'], ['\n', '']])
})
it ('gets first N visible symbols (preserving invisible parts)', () => {
assert.equal (first ('💩23456789', 0), '')
assert.equal (first ('💩23456789', 3), '💩23')
assert.equal (first ('💩23456789', 100), '💩23456789')
const s = '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '67' + '\n' + '89' + '\u001b[39m\u001b[22m'
assert.equal (first (s, 0), '\u001b[22m\u001b[1m' + '' + '\u0000' + '' + '\u001b[39m' + '' + '\n' + '' + '\u001b[39m\u001b[22m')
assert.equal (first (s, 3), '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '' + '\u001b[39m' + '' + '\n' + '' + '\u001b[39m\u001b[22m')
assert.equal (first (s, 4), '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '4' + '\u001b[39m' + '' + '\n' + '' + '\u001b[39m\u001b[22m')
assert.equal (first (s, 6), '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '6' + '\n' + '' + '\u001b[39m\u001b[22m')
assert.equal (first (s, 9), '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '67' + '\n' + '89' + '\u001b[39m\u001b[22m')
assert.equal (first (s, 100), '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '67' + '\n' + '89' + '\u001b[39m\u001b[22m')
})
})
|
