view models

apps/website/lib/view-models/LeagueStatsViewModel.test.ts

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+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');
+  });
+});