edr-platform/e2e-ui/specs/portal/ua8-promo-drop-round-trip.spec.ts

import { test, expect } from "@playwright/test";
import { PrismaClient } from "@prisma/client";
import { bookTrip } from "../../fixtures/booking-flow";
import { PROMO_VALID } from "../../fixtures/data";

const prisma = new PrismaClient();
test.afterAll(async () => {
  await prisma.$disconnect();
});

/**
 * Round-trip variant of UA-8 (H-13): a VALID promo must discount the COMBINED two-leg total, not
 * just one leg. createGuestRoundTripBooking is a separate implementation from one-way's
 * createGuestBooking — it already had one confirmed divergence from the one-way H-13 fix (missing
 * until a later patch), so this exists to catch any other one-way/round-trip discount divergence.
 * UA-6 established the no-discount round-trip baseline: totalMinor === cardBaseFareMinor * 2 for a
 * symmetric-distance route. PROMO_VALID is a flat 10% off (see fixtures/data.ts / seed-ui.ts).
 */
test("round-trip: a valid promo discounts the combined two-leg total (H-13 parity)", async ({ page }) => {
  const r = await bookTrip(page, {
    tripType: "ROUND_TRIP",
    nationality: "Ethiopian",
    paymentMethod: "WALLET",
    promoCode: PROMO_VALID,
  });
  expect(r.confirmed).toBe(true);

  const booking = await prisma.booking.findUniqueOrThrow({ where: { id: r.bookingId } });
  expect(booking.bookingType).toBe("ROUND_TRIP");

  const combinedBaseFareMinor = r.cardBaseFareMinor * 2; // UA-6 baseline: symmetric legs
  const expectedDiscountMinor = Math.round(combinedBaseFareMinor * 0.1);
  const expectedTotalMinor = combinedBaseFareMinor - expectedDiscountMinor;

  expect(booking.totalMinor).toBeLessThan(combinedBaseFareMinor); // discount honored, not dropped
  expect(booking.totalMinor).toBe(expectedTotalMinor);
});