import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'; import {  getNonEmptyCategories,  groupSessionsByDate,} from '../../../src/renderer/utils/dateGrouping';import type { Session } from '../../../src/renderer/types/data'; // Helper to create a session with a specific datefunction createSession(id: string, createdAt: Date): Session {  return {    id,    createdAt: createdAt.toISOString(),    updatedAt: createdAt.toISOString(),    displayName: `Session ${id}`,    triggerCount: 1,    ongoing: false,    lastTriggerPreview: 'Test',    cwd: '/test',    todos: [],    totalTokens: 0,  };} describe('dateGrouping', () => {  beforeEach(() => {    // Mock current date to 2024-01-15 12:00:00    vi.useFakeTimers();    vi.setSystemTime(new Date('2024-01-15T12:00:00Z'));  });   afterEach(() => {    vi.useRealTimers();  });   describe('groupSessionsByDate', () => {    it('should group session from today', () => {      const today = new Date('2024-01-15T10:00:00Z');      const sessions = [createSession('1', today)];       const result = groupSessionsByDate(sessions);       expect(result.Today).toHaveLength(1);      expect(result.Yesterday).toHaveLength(0);      expect(result['Previous 7 Days']).toHaveLength(0);      expect(result.Older).toHaveLength(0);    });     it('should group session from yesterday', () => {      const yesterday = new Date('2024-01-14T10:00:00Z');      const sessions = [createSession('1', yesterday)];       const result = groupSessionsByDate(sessions);       expect(result.Today).toHaveLength(0);      expect(result.Yesterday).toHaveLength(1);      expect(result['Previous 7 Days']).toHaveLength(0);      expect(result.Older).toHaveLength(0);    });     it('should group session from 3 days ago to Previous 7 Days', () => {      const threeDaysAgo = new Date('2024-01-12T10:00:00Z');      const sessions = [createSession('1', threeDaysAgo)];       const result = groupSessionsByDate(sessions);       expect(result.Today).toHaveLength(0);      expect(result.Yesterday).toHaveLength(0);      expect(result['Previous 7 Days']).toHaveLength(1);      expect(result.Older).toHaveLength(0);    });     it('should group session from 10 days ago to Older', () => {      const tenDaysAgo = new Date('2024-01-05T10:00:00Z');      const sessions = [createSession('1', tenDaysAgo)];       const result = groupSessionsByDate(sessions);       expect(result.Today).toHaveLength(0);      expect(result.Yesterday).toHaveLength(0);      expect(result['Previous 7 Days']).toHaveLength(0);      expect(result.Older).toHaveLength(1);    });     it('should distribute multiple sessions to correct groups', () => {      const sessions = [        createSession('1', new Date('2024-01-15T10:00:00Z')), // Today        createSession('2', new Date('2024-01-15T08:00:00Z')), // Today        createSession('3', new Date('2024-01-14T10:00:00Z')), // Yesterday        createSession('4', new Date('2024-01-12T10:00:00Z')), // Previous 7 Days        createSession('5', new Date('2024-01-01T10:00:00Z')), // Older      ];       const result = groupSessionsByDate(sessions);       expect(result.Today).toHaveLength(2);      expect(result.Yesterday).toHaveLength(1);      expect(result['Previous 7 Days']).toHaveLength(1);      expect(result.Older).toHaveLength(1);    });     it('should handle empty sessions array', () => {      const result = groupSessionsByDate([]);       expect(result.Today).toHaveLength(0);      expect(result.Yesterday).toHaveLength(0);      expect(result['Previous 7 Days']).toHaveLength(0);      expect(result.Older).toHaveLength(0);    });     it('should maintain order within groups', () => {      const sessions = [        createSession('first', new Date('2024-01-15T08:00:00Z')),        createSession('second', new Date('2024-01-15T10:00:00Z')),        createSession('third', new Date('2024-01-15T12:00:00Z')),      ];       const result = groupSessionsByDate(sessions);       expect(result.Today.map((s) => s.id)).toEqual(['first', 'second', 'third']);    });  });   describe('getNonEmptyCategories', () => {    it('should return only non-empty categories', () => {      const grouped = {        Today: [createSession('1', new Date())],        Yesterday: [],        'Previous 7 Days': [createSession('2', new Date())],        Older: [],      };       const result = getNonEmptyCategories(grouped);       expect(result).toEqual(['Today', 'Previous 7 Days']);    });     it('should return categories in display order', () => {      const grouped = {        Today: [createSession('1', new Date())],        Yesterday: [createSession('2', new Date())],        'Previous 7 Days': [createSession('3', new Date())],        Older: [createSession('4', new Date())],      };       const result = getNonEmptyCategories(grouped);       expect(result).toEqual(['Today', 'Yesterday', 'Previous 7 Days', 'Older']);    });     it('should return empty array when all categories are empty', () => {      const grouped = {        Today: [],        Yesterday: [],        'Previous 7 Days': [],        Older: [],      };       const result = getNonEmptyCategories(grouped);       expect(result).toEqual([]);    });  });});