import { describe, it, expect, vi } from 'vitest';import {  getPricing,  calculateTieredCost,  calculateMessageCost,  getDisplayPricing,} from '@shared/utils/pricing'; describe('Shared Pricing Module', () => {  describe('getPricing', () => {    it('should find pricing by exact model name', () => {      const pricing = getPricing('claude-3-5-sonnet-20241022');      expect(pricing).not.toBeNull();      expect(pricing!.input_cost_per_token).toBeGreaterThan(0);      expect(pricing!.output_cost_per_token).toBeGreaterThan(0);    });     it('should find pricing case-insensitively', () => {      const pricing = getPricing('Claude-3-5-Sonnet-20241022');      expect(pricing).not.toBeNull();    });     it('should return null for unknown models', () => {      const pricing = getPricing('totally-fake-model-xyz');      expect(pricing).toBeNull();    });  });   describe('calculateTieredCost', () => {    it('should use base rate for tokens below 200k', () => {      const cost = calculateTieredCost(100_000, 0.000003);      expect(cost).toBeCloseTo(0.3, 6);    });     it('should apply tiered rate above 200k', () => {      const cost = calculateTieredCost(250_000, 0.000003, 0.000006);      expect(cost).toBeCloseTo(0.9, 6);    });     it('should use base rate when no tiered rate provided', () => {      const cost = calculateTieredCost(250_000, 0.000015);      expect(cost).toBeCloseTo(3.75, 6);    });     it('should return 0 for zero or negative tokens', () => {      expect(calculateTieredCost(0, 0.000003)).toBe(0);      expect(calculateTieredCost(-100, 0.000003)).toBe(0);    });  });   describe('calculateMessageCost', () => {    it('should compute cost for a known model', () => {      const cost = calculateMessageCost('claude-3-5-sonnet-20241022', 1000, 500, 0, 0);      expect(cost).toBeCloseTo(0.0105, 6);    });     it('should return 0 for unknown models', () => {      const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => undefined);      const cost = calculateMessageCost('unknown-model', 1000, 500, 0, 0);      expect(cost).toBe(0);      expect(warnSpy).toHaveBeenCalledWith(        '[pricing] No pricing data for model "unknown-model", cost will be $0'      );      warnSpy.mockRestore();    });     it('should include cache token costs', () => {      const cost = calculateMessageCost('claude-3-5-sonnet-20241022', 1000, 500, 300, 200);      expect(cost).toBeGreaterThan(0.0105);    });  });   describe('getDisplayPricing', () => {    it('should return per-million rates for a known model', () => {      const dp = getDisplayPricing('claude-3-5-sonnet-20241022');      expect(dp).not.toBeNull();      expect(dp!.input).toBeCloseTo(3.0, 1);      expect(dp!.output).toBeCloseTo(15.0, 1);    });     it('should return null for unknown models', () => {      expect(getDisplayPricing('unknown-model')).toBeNull();    });  });});