view models

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

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+import { describe, it, expect } from 'vitest';
+import { LeagueStandingsViewModel } from './LeagueStandingsViewModel';
+import type { LeagueStandingDTO } from '../types/generated/LeagueStandingDTO';
+
+describe('LeagueStandingsViewModel', () => {
+  it('should create instance with standings', () => {
+    const standings: LeagueStandingDTO[] = [
+      {
+        driverId: 'driver-1',
+        position: 1,
+        points: 100,
+        wins: 3,
+        podiums: 5,
+        races: 8,
+      },
+      {
+        driverId: 'driver-2',
+        position: 2,
+        points: 85,
+        wins: 2,
+        podiums: 4,
+        races: 8,
+      },
+    ];
+
+    const viewModel = new LeagueStandingsViewModel(
+      { standings },
+      'driver-1'
+    );
+
+    expect(viewModel.standings).toHaveLength(2);
+    expect(viewModel.standings[0].driverId).toBe('driver-1');
+    expect(viewModel.standings[1].driverId).toBe('driver-2');
+  });
+
+  it('should pass leader points to first entry', () => {
+    const standings: LeagueStandingDTO[] = [
+      {
+        driverId: 'driver-1',
+        position: 1,
+        points: 100,
+        wins: 3,
+        podiums: 5,
+        races: 8,
+      },
+    ];
+
+    const viewModel = new LeagueStandingsViewModel(
+      { standings },
+      'driver-1'
+    );
+
+    expect(viewModel.standings[0].pointsGapToLeader).toBe(0);
+  });
+
+  it('should calculate points gaps correctly', () => {
+    const standings: LeagueStandingDTO[] = [
+      {
+        driverId: 'driver-1',
+        position: 1,
+        points: 100,
+        wins: 3,
+        podiums: 5,
+        races: 8,
+      },
+      {
+        driverId: 'driver-2',
+        position: 2,
+        points: 85,
+        wins: 2,
+        podiums: 4,
+        races: 8,
+      },
+      {
+        driverId: 'driver-3',
+        position: 3,
+        points: 70,
+        wins: 1,
+        podiums: 3,
+        races: 8,
+      },
+    ];
+
+    const viewModel = new LeagueStandingsViewModel(
+      { standings },
+      'driver-2'
+    );
+
+    expect(viewModel.standings[1].pointsGapToLeader).toBe(-15);
+    expect(viewModel.standings[1].pointsGapToNext).toBe(15);
+  });
+
+  it('should identify current user', () => {
+    const standings: LeagueStandingDTO[] = [
+      {
+        driverId: 'driver-1',
+        position: 1,
+        points: 100,
+        wins: 3,
+        podiums: 5,
+        races: 8,
+      },
+      {
+        driverId: 'driver-2',
+        position: 2,
+        points: 85,
+        wins: 2,
+        podiums: 4,
+        races: 8,
+      },
+    ];
+
+    const viewModel = new LeagueStandingsViewModel(
+      { standings },
+      'driver-2'
+    );
+
+    expect(viewModel.standings[0].isCurrentUser).toBe(false);
+    expect(viewModel.standings[1].isCurrentUser).toBe(true);
+  });
+
+  it('should handle empty standings', () => {
+    const viewModel = new LeagueStandingsViewModel(
+      { standings: [] },
+      'driver-1'
+    );
+
+    expect(viewModel.standings).toHaveLength(0);
+  });
+
+  it('should track position changes when previousStandings provided', () => {
+    const standings: LeagueStandingDTO[] = [
+      {
+        driverId: 'driver-1',
+        position: 1,
+        points: 100,
+        wins: 3,
+        podiums: 5,
+        races: 8,
+      },
+      {
+        driverId: 'driver-2',
+        position: 2,
+        points: 85,
+        wins: 2,
+        podiums: 4,
+        races: 8,
+      },
+    ];
+
+    const previousStandings: LeagueStandingDTO[] = [
+      {
+        driverId: 'driver-1',
+        position: 2,
+        points: 80,
+        wins: 2,
+        podiums: 4,
+        races: 7,
+      },
+      {
+        driverId: 'driver-2',
+        position: 1,
+        points: 90,
+        wins: 3,
+        podiums: 5,
+        races: 7,
+      },
+    ];
+
+    const viewModel = new LeagueStandingsViewModel(
+      { standings },
+      'driver-1',
+      previousStandings
+    );
+
+    expect(viewModel.standings[0].trend).toBe('up');
+    expect(viewModel.standings[1].trend).toBe('down');
+  });
+});