import { describe, expect, it } from 'vitest'; import {  estimateContentTokens,  estimateTokens,  formatTokens,  formatTokensCompact,  formatTokensDetailed,} from '../../../src/shared/utils/tokenFormatting'; describe('tokenFormatting', () => {  describe('formatTokensCompact', () => {    it('should format small numbers as-is', () => {      expect(formatTokensCompact(500)).toBe('500');    });     it('should format thousands with k suffix', () => {      expect(formatTokensCompact(1500)).toBe('1.5k');    });     it('should format exact thousands', () => {      expect(formatTokensCompact(1000)).toBe('1.0k');    });     it('should format millions with M suffix', () => {      expect(formatTokensCompact(1500000)).toBe('1.5M');    });     it('should format exact millions', () => {      expect(formatTokensCompact(1000000)).toBe('1.0M');    });     it('should handle zero', () => {      expect(formatTokensCompact(0)).toBe('0');    });  });   describe('formatTokens', () => {    it('should format small numbers as-is', () => {      expect(formatTokens(500)).toBe('500');    });     it('should format 1k-10k with one decimal', () => {      expect(formatTokens(1500)).toBe('1.5k');      expect(formatTokens(9999)).toBe('10.0k');    });     it('should format 10k+ as whole numbers', () => {      expect(formatTokens(15000)).toBe('15k');      expect(formatTokens(50000)).toBe('50k');    });     it('should handle exact thousands', () => {      expect(formatTokens(1000)).toBe('1.0k');      expect(formatTokens(10000)).toBe('10k');    });  });   describe('formatTokensDetailed', () => {    it('should format with locale separators', () => {      // Note: This test may vary by locale      const result = formatTokensDetailed(1000);      expect(result).toContain('1');      expect(result.length).toBeGreaterThan(3);    });     it('should format large numbers', () => {      const result = formatTokensDetailed(1000000);      expect(result).toContain('1');      expect(result.length).toBeGreaterThan(6);    });  });   describe('estimateTokens', () => {    it('should return 0 for empty string', () => {      expect(estimateTokens('')).toBe(0);    });     it('should return 0 for null', () => {      expect(estimateTokens(null)).toBe(0);    });     it('should return 0 for undefined', () => {      expect(estimateTokens(undefined)).toBe(0);    });     it('should estimate tokens by dividing length by 4', () => {      // 12 chars / 4 = 3 tokens      expect(estimateTokens('Hello World!')).toBe(3);    });     it('should ceil the result', () => {      // 5 chars / 4 = 1.25, ceil to 2      expect(estimateTokens('Hello')).toBe(2);    });  });   describe('estimateContentTokens', () => {    it('should handle string content', () => {      expect(estimateContentTokens('Hello World!')).toBe(3);    });     it('should handle array content by stringifying', () => {      const content = [{ type: 'text', text: 'Hello' }];      const stringified = JSON.stringify(content);      expect(estimateContentTokens(content)).toBe(Math.ceil(stringified.length / 4));    });     it('should handle object content by stringifying', () => {      const content = { type: 'text', text: 'Hello' };      const stringified = JSON.stringify(content);      expect(estimateContentTokens(content)).toBe(Math.ceil(stringified.length / 4));    });     it('should return 0 for null', () => {      expect(estimateContentTokens(null)).toBe(0);    });     it('should return 0 for undefined', () => {      expect(estimateContentTokens(undefined)).toBe(0);    });  });});