view data tests

apps/website/lib/builders/view-data/HomeViewDataBuilder.test.ts

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+import { describe, it, expect } from 'vitest';
+import { HomeViewDataBuilder } from './HomeViewDataBuilder';
+import type { HomeDataDTO } from '@/lib/types/dtos/HomeDataDTO';
+
+describe('HomeViewDataBuilder', () => {
+  describe('happy paths', () => {
+    it('should transform HomeDataDTO to HomeViewData correctly', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: true,
+        upcomingRaces: [
+          {
+            id: 'race-1',
+            name: 'Test Race',
+            scheduledAt: '2024-01-01T10:00:00Z',
+            track: 'Test Track',
+          },
+        ],
+        topLeagues: [
+          {
+            id: 'league-1',
+            name: 'Test League',
+            description: 'Test Description',
+          },
+        ],
+        teams: [
+          {
+            id: 'team-1',
+            name: 'Test Team',
+            tag: 'TT',
+          },
+        ],
+      };
+
+      const result = HomeViewDataBuilder.build(homeDataDto);
+
+      expect(result).toEqual({
+        isAlpha: true,
+        upcomingRaces: [
+          {
+            id: 'race-1',
+            name: 'Test Race',
+            scheduledAt: '2024-01-01T10:00:00Z',
+            track: 'Test Track',
+          },
+        ],
+        topLeagues: [
+          {
+            id: 'league-1',
+            name: 'Test League',
+            description: 'Test Description',
+          },
+        ],
+        teams: [
+          {
+            id: 'team-1',
+            name: 'Test Team',
+            tag: 'TT',
+          },
+        ],
+      });
+    });
+
+    it('should handle empty arrays correctly', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: false,
+        upcomingRaces: [],
+        topLeagues: [],
+        teams: [],
+      };
+
+      const result = HomeViewDataBuilder.build(homeDataDto);
+
+      expect(result).toEqual({
+        isAlpha: false,
+        upcomingRaces: [],
+        topLeagues: [],
+        teams: [],
+      });
+    });
+
+    it('should handle multiple items in arrays', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: true,
+        upcomingRaces: [
+          { id: 'race-1', name: 'Race 1', scheduledAt: '2024-01-01T10:00:00Z', track: 'Track 1' },
+          { id: 'race-2', name: 'Race 2', scheduledAt: '2024-01-02T10:00:00Z', track: 'Track 2' },
+        ],
+        topLeagues: [
+          { id: 'league-1', name: 'League 1', description: 'Description 1' },
+          { id: 'league-2', name: 'League 2', description: 'Description 2' },
+        ],
+        teams: [
+          { id: 'team-1', name: 'Team 1', tag: 'T1' },
+          { id: 'team-2', name: 'Team 2', tag: 'T2' },
+        ],
+      };
+
+      const result = HomeViewDataBuilder.build(homeDataDto);
+
+      expect(result.upcomingRaces).toHaveLength(2);
+      expect(result.topLeagues).toHaveLength(2);
+      expect(result.teams).toHaveLength(2);
+    });
+  });
+
+  describe('data transformation', () => {
+    it('should preserve all DTO fields in the output', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: true,
+        upcomingRaces: [{ id: 'race-1', name: 'Race', scheduledAt: '2024-01-01T10:00:00Z', track: 'Track' }],
+        topLeagues: [{ id: 'league-1', name: 'League', description: 'Description' }],
+        teams: [{ id: 'team-1', name: 'Team', tag: 'T' }],
+      };
+
+      const result = HomeViewDataBuilder.build(homeDataDto);
+
+      expect(result.isAlpha).toBe(homeDataDto.isAlpha);
+      expect(result.upcomingRaces).toEqual(homeDataDto.upcomingRaces);
+      expect(result.topLeagues).toEqual(homeDataDto.topLeagues);
+      expect(result.teams).toEqual(homeDataDto.teams);
+    });
+
+    it('should not modify the input DTO', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: true,
+        upcomingRaces: [{ id: 'race-1', name: 'Race', scheduledAt: '2024-01-01T10:00:00Z', track: 'Track' }],
+        topLeagues: [{ id: 'league-1', name: 'League', description: 'Description' }],
+        teams: [{ id: 'team-1', name: 'Team', tag: 'T' }],
+      };
+
+      const originalDto = { ...homeDataDto };
+      HomeViewDataBuilder.build(homeDataDto);
+
+      expect(homeDataDto).toEqual(originalDto);
+    });
+  });
+
+  describe('edge cases', () => {
+    it('should handle false isAlpha value', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: false,
+        upcomingRaces: [],
+        topLeagues: [],
+        teams: [],
+      };
+
+      const result = HomeViewDataBuilder.build(homeDataDto);
+
+      expect(result.isAlpha).toBe(false);
+    });
+
+    it('should handle null/undefined values in arrays', () => {
+      const homeDataDto: HomeDataDTO = {
+        isAlpha: true,
+        upcomingRaces: [{ id: 'race-1', name: 'Race', scheduledAt: '2024-01-01T10:00:00Z', track: 'Track' }],
+        topLeagues: [{ id: 'league-1', name: 'League', description: 'Description' }],
+        teams: [{ id: 'team-1', name: 'Team', tag: 'T' }],
+      };
+
+      const result = HomeViewDataBuilder.build(homeDataDto);
+
+      expect(result.upcomingRaces[0].id).toBe('race-1');
+      expect(result.topLeagues[0].id).toBe('league-1');
+      expect(result.teams[0].id).toBe('team-1');
+    });
+  });
+});