renjue
f1502ed08c
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Co-authored-by: Cursor <cursoragent@cursor.com>
31 lines
973 B
JavaScript
31 lines
973 B
JavaScript
import { describe, it, expect } from 'vitest'
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import { getByteLength, truncateToMaxBytes } from '../../src/utils/byteUtils.js'
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describe('byteUtils', () => {
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it('counts ASCII bytes', () => {
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expect(getByteLength('hello')).toBe(5)
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expect(getByteLength('')).toBe(0)
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})
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it('counts UTF-8 multibyte characters', () => {
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expect(getByteLength('中')).toBe(3)
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expect(getByteLength('hello世界')).toBe(11)
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})
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it('returns original string when within limit', () => {
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expect(truncateToMaxBytes('hello', 10)).toBe('hello')
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})
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it('truncates by bytes without breaking multibyte chars', () => {
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const text = 'a'.repeat(10) + '中'
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const truncated = truncateToMaxBytes(text, 11)
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expect(getByteLength(truncated)).toBeLessThanOrEqual(11)
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expect(truncated).not.toContain('中')
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})
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it('handles exact byte boundary', () => {
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expect(truncateToMaxBytes('ab', 2)).toBe('ab')
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expect(truncateToMaxBytes('abc', 2)).toBe('ab')
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})
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})
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