import { describe, it, expect } from 'vitest';
import { LeagueStatsViewModel } from './LeagueStatsViewModel';

const createDto = (overrides: Partial<{ totalLeagues: number }> = {}): { totalLeagues: number } => ({
  totalLeagues: 1234,
  ...overrides,
});

describe('LeagueStatsViewModel', () => {
  it('maps totalLeagues from DTO', () => {
    const dto = createDto({ totalLeagues: 42 });

    const vm = new LeagueStatsViewModel(dto);

    expect(vm.totalLeagues).toBe(42);
  });

  it('formats totalLeagues using locale separators', () => {
    const dto = createDto({ totalLeagues: 12345 });

    const vm = new LeagueStatsViewModel(dto);

    expect(vm.formattedTotalLeagues).toBe((12345).toLocaleString());
  });

  it('handles zero leagues correctly', () => {
    const dto = createDto({ totalLeagues: 0 });

    const vm = new LeagueStatsViewModel(dto);

    expect(vm.totalLeagues).toBe(0);
    expect(vm.formattedTotalLeagues).toBe('0');
  });
});