Vito Sansevero
d8bf461f2f
The server counted code points while the Library's JavaScript counts UTF-16 units, so a first line of emoji kept 80 emoji on cards but showed 40 in the Library. Both now cut at 80 UTF-16 units and drop a character that would straddle the limit instead of leaving half a surrogate pair.
16 lines
840 B
JavaScript
16 lines
840 B
JavaScript
import test from 'node:test';
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import assert from 'node:assert/strict';
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const { libraryTitle } = await import('../../web/js/workspace/library.mjs').catch(() => ({}));
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test('library title counts UTF-16 units and never splits a surrogate pair', () => {
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assert.equal(typeof libraryTitle, 'function', 'libraryTitle is exported');
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assert.equal(libraryTitle(' short line \nsecond'), 'short line');
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assert.equal(libraryTitle('a'.repeat(80)), 'a'.repeat(80));
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assert.equal(libraryTitle('a'.repeat(81)), `${'a'.repeat(80)}…`);
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// 80 emoji are 160 UTF-16 units: 40 fit.
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assert.equal(libraryTitle('😀'.repeat(80)), `${'😀'.repeat(40)}…`);
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// 79 units then an emoji: the emoji would straddle the limit, so it is dropped whole.
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assert.equal(libraryTitle(`${'a'.repeat(79)}😀b`), `${'a'.repeat(79)}…`);
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});
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