mirror of
https://github.com/Permissionless-Software-Foundation/psf-memo-client.git
synced 2026-09-21 16:52:02 -07:00
Chris Troutner
230618d2a0
Replace Node-only Buffer.byteLength with a TextEncoder-based UTF-8 byte length helper so the Set Name page and byte counter work in the browser. By specifier.
39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
/*
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Unit tests for the UTF-8 byte-length helper (src/services/utf8.js).
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The helper must report the same UTF-8 byte length as Node's Buffer without
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depending on the Node-only `Buffer` global, so the browser build (which has
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no Buffer) can count bytes for the Memo set-name counter and length check.
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*/
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'use strict'
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const test = require('node:test')
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const assert = require('node:assert/strict')
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const { byteLength } = require('../../src/services/utf8')
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test('byteLength matches Buffer.byteLength for ASCII text', () => {
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for (const s of ['', 'trout', 'a longer name with spaces', 'x'.repeat(77)]) {
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assert.equal(byteLength(s), Buffer.byteLength(s, 'utf8'))
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}
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})
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test('byteLength matches Buffer.byteLength for multi-byte characters', () => {
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for (const s of ['é', 'é'.repeat(38), '😀', '😀'.repeat(20), '日本語']) {
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assert.equal(byteLength(s), Buffer.byteLength(s, 'utf8'))
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}
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})
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test('byteLength counts UTF-8 bytes, not characters', () => {
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// 'é' is 1 character but 2 UTF-8 bytes; an emoji is 1 character but 4 bytes.
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assert.equal(byteLength('é'), 2)
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assert.equal(byteLength('😀'), 4)
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assert.equal(byteLength('a'), 1)
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})
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test('byteLength coerces non-string input to a string', () => {
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assert.equal(byteLength(42), 2)
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assert.equal(byteLength(null), 4) // String(null) === 'null'
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})
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