view models

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

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+import { describe, it, expect } from 'vitest';
+import { DriverLeaderboardItemViewModel } from './DriverLeaderboardItemViewModel';
+import { DriverLeaderboardItemDTO } from '../types/generated/DriverLeaderboardItemDTO';
+
+describe('DriverLeaderboardItemViewModel', () => {
+  const mockDTO: DriverLeaderboardItemDTO = {
+    id: '1',
+    name: 'Test Driver',
+    rating: 1500,
+    skillLevel: 'advanced',
+    nationality: 'USA',
+    racesCompleted: 50,
+    wins: 10,
+    podiums: 25,
+    isActive: true,
+    rank: 5
+  };
+
+  it('should create instance from DTO', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1);
+    
+    expect(viewModel.id).toBe('1');
+    expect(viewModel.name).toBe('Test Driver');
+    expect(viewModel.position).toBe(1);
+  });
+
+  it('should calculate win rate correctly', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1);
+    
+    expect(viewModel.winRate).toBe(20); // 10/50 * 100
+  });
+
+  it('should format win rate as percentage', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1);
+    
+    expect(viewModel.winRateFormatted).toBe('20.0%');
+  });
+
+  it('should return correct skill level color', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1);
+    
+    expect(viewModel.skillLevelColor).toBe('orange'); // advanced = orange
+  });
+
+  it('should return correct skill level icon', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1);
+    
+    expect(viewModel.skillLevelIcon).toBe('🥇'); // advanced = 🥇
+  });
+
+  it('should detect rating trend up', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1, 1400);
+    
+    expect(viewModel.ratingTrend).toBe('up');
+  });
+
+  it('should detect rating trend down', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1, 1600);
+    
+    expect(viewModel.ratingTrend).toBe('down');
+  });
+
+  it('should show rating change indicator', () => {
+    const viewModel = new DriverLeaderboardItemViewModel(mockDTO, 1, 1400);
+    
+    expect(viewModel.ratingChangeIndicator).toBe('+100');
+  });
+
+  it('should handle zero races for win rate', () => {
+    const dto = { ...mockDTO, racesCompleted: 0, wins: 0 };
+    const viewModel = new DriverLeaderboardItemViewModel(dto, 1);
+    
+    expect(viewModel.winRate).toBe(0);
+  });
+});