view models

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

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+import { describe, it, expect } from 'vitest';
+import { SponsorshipPricingViewModel } from './SponsorshipPricingViewModel';
+
+describe('SponsorshipPricingViewModel', () => {
+  const dto = {
+    mainSlotPrice: 10_000,
+    secondarySlotPrice: 6_000,
+    currency: 'USD',
+  } as any;
+
+  it('maps basic pricing fields from DTO', () => {
+    const vm = new SponsorshipPricingViewModel(dto);
+
+    expect(vm.mainSlotPrice).toBe(dto.mainSlotPrice);
+    expect(vm.secondarySlotPrice).toBe(dto.secondarySlotPrice);
+    expect(vm.currency).toBe(dto.currency);
+  });
+
+  it('exposes formatted prices and price difference', () => {
+    const vm = new SponsorshipPricingViewModel(dto);
+
+    expect(vm.formattedMainSlotPrice).toBe(`${dto.currency} ${dto.mainSlotPrice.toLocaleString()}`);
+    expect(vm.formattedSecondarySlotPrice).toBe(`${dto.currency} ${dto.secondarySlotPrice.toLocaleString()}`);
+
+    const expectedDiff = dto.mainSlotPrice - dto.secondarySlotPrice;
+    expect(vm.priceDifference).toBe(expectedDiff);
+    expect(vm.formattedPriceDifference).toBe(`${dto.currency} ${expectedDiff.toLocaleString()}`);
+  });
+
+  it('computes discount percentage for secondary slots', () => {
+    const vm = new SponsorshipPricingViewModel(dto);
+
+    const expectedDiscount = Math.round((1 - dto.secondarySlotPrice / dto.mainSlotPrice) * 100);
+    expect(vm.secondaryDiscountPercentage).toBe(expectedDiscount);
+
+    const zeroMain = new SponsorshipPricingViewModel({ ...dto, mainSlotPrice: 0 });
+    expect(zeroMain.secondaryDiscountPercentage).toBe(0);
+  });
+});