3 var wcwidth = require('../')
4 var test = require('tape')
6 test('handles regular strings', function(t) {
7 t.strictEqual(wcwidth('abc'), 3)
11 test('handles multibyte strings', function(t) {
12 t.strictEqual(wcwidth('字的模块'), 8)
16 test('handles multibyte characters mixed with regular characters', function(t) {
17 t.strictEqual(wcwidth('abc 字的模块'), 12)
21 test('ignores control characters e.g. \\n', function(t) {
22 t.strictEqual(wcwidth('abc\n字的模块\ndef'), 14)
26 test('ignores bad input', function(t) {
27 t.strictEqual(wcwidth(''), 0)
28 t.strictEqual(wcwidth(3), 0)
29 t.strictEqual(wcwidth({}), 0)
30 t.strictEqual(wcwidth([]), 0)
31 t.strictEqual(wcwidth(), 0)
35 test('ignores nul (charcode 0)', function(t) {
36 t.strictEqual(wcwidth(String.fromCharCode(0)), 0)
40 test('ignores nul mixed with chars', function(t) {
41 t.strictEqual(wcwidth('a' + String.fromCharCode(0) + '\n字的'), 5)
45 test('can have custom value for nul', function(t) {
46 t.strictEqual(wcwidth.config({
48 })(String.fromCharCode(0) + 'a字的'), 15)
52 test('can have custom control char value', function(t) {
53 t.strictEqual(wcwidth.config({
55 })('abc\n字的模块\ndef'), 16)
59 test('negative custom control chars == -1', function(t) {
60 t.strictEqual(wcwidth.config({
62 })('abc\n字的模块\ndef'), -1)