mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
3.1 KiB
71 lines
3.1 KiB
// Flags: --expose_internals
|
|
'use strict';
|
|
const common = require('../common');
|
|
|
|
if (!common.hasIntl)
|
|
common.skip('missing Intl');
|
|
|
|
const assert = require('assert');
|
|
const readline = require('internal/readline');
|
|
|
|
// Test column width
|
|
|
|
// Ll (Lowercase Letter): LATIN SMALL LETTER A
|
|
assert.strictEqual(readline.getStringWidth('a'), 1);
|
|
assert.strictEqual(readline.getStringWidth(0x0061), 1);
|
|
// Lo (Other Letter)
|
|
assert.strictEqual(readline.getStringWidth('丁'), 2);
|
|
assert.strictEqual(readline.getStringWidth(0x4E01), 2);
|
|
// Surrogate pairs
|
|
assert.strictEqual(readline.getStringWidth('\ud83d\udc78\ud83c\udfff'), 2);
|
|
assert.strictEqual(readline.getStringWidth('👅'), 2);
|
|
// Cs (Surrogate): High Surrogate
|
|
assert.strictEqual(readline.getStringWidth('\ud83d'), 1);
|
|
// Cs (Surrogate): Low Surrogate
|
|
assert.strictEqual(readline.getStringWidth('\udc78'), 1);
|
|
// Cc (Control): NULL
|
|
assert.strictEqual(readline.getStringWidth(0), 0);
|
|
// Cc (Control): BELL
|
|
assert.strictEqual(readline.getStringWidth(0x0007), 0);
|
|
// Cc (Control): LINE FEED
|
|
assert.strictEqual(readline.getStringWidth('\n'), 0);
|
|
// Cf (Format): SOFT HYPHEN
|
|
assert.strictEqual(readline.getStringWidth(0x00AD), 1);
|
|
// Cf (Format): LEFT-TO-RIGHT MARK
|
|
// Cf (Format): RIGHT-TO-LEFT MARK
|
|
assert.strictEqual(readline.getStringWidth('\u200Ef\u200F'), 1);
|
|
// Cn (Unassigned): Not a character
|
|
assert.strictEqual(readline.getStringWidth(0x10FFEF), 1);
|
|
// Cn (Unassigned): Not a character (but in a CJK range)
|
|
assert.strictEqual(readline.getStringWidth(0x3FFEF), 2);
|
|
// Mn (Nonspacing Mark): COMBINING ACUTE ACCENT
|
|
assert.strictEqual(readline.getStringWidth(0x0301), 0);
|
|
// Mc (Spacing Mark): BALINESE ADEG ADEG
|
|
// Chosen as its Canonical_Combining_Class is not 0, but is not a 0-width
|
|
// character.
|
|
assert.strictEqual(readline.getStringWidth(0x1B44), 1);
|
|
// Me (Enclosing Mark): COMBINING ENCLOSING CIRCLE
|
|
assert.strictEqual(readline.getStringWidth(0x20DD), 0);
|
|
|
|
// The following is an emoji sequence. In some implementations, it is
|
|
// represented as a single glyph, in other implementations as a sequence
|
|
// of individual glyphs. By default, the algorithm will assume the single
|
|
// glyph interpretation and return a value of 2. By passing the
|
|
// expandEmojiSequence: true option, each component will be counted
|
|
// individually.
|
|
assert.strictEqual(readline.getStringWidth('👩👩👧👧'), 2);
|
|
assert.strictEqual(
|
|
readline.getStringWidth('👩👩👧👧', {expandEmojiSequence: true}), 8);
|
|
|
|
// By default, unicode characters whose width is considered ambiguous will
|
|
// be considered half-width. For these characters, getStringWidth will return
|
|
// 1. In some contexts, however, it is more appropriate to consider them full
|
|
// width. By default, the algorithm will assume half width. By passing
|
|
// the ambiguousAsFullWidth: true option, ambiguous characters will be counted
|
|
// as 2 columns.
|
|
assert.strictEqual(readline.getStringWidth('\u01d4'), 1);
|
|
assert.strictEqual(
|
|
readline.getStringWidth('\u01d4', {ambiguousAsFullWidth: true}), 2);
|
|
|
|
// Control chars and combining chars are zero
|
|
assert.strictEqual(readline.getStringWidth('\u200E\n\u220A\u20D2'), 1);
|
|
|