Kuma/tests/courses/seat-cancellation.test.ts

import { describe, it, expect } from "vitest";
import {
  resolveSeatCancellation,
  seatShareCents,
} from "@/src/modules/courses/lib/seat-cancellation";

describe("seatShareCents", () => {
  // 2 Plätze, fester Rabatt von 5,01 €: 52,99 € Kurs + 1,00 € Servicegebühr
  const booking = {
    amountPaid: 5399,
    platformFee: 100,
    platformFeeOnTop: true,
    seats: 2,
    seatsPurchased: 2,
  };

  it("teilt den Kursanteil auf die Plätze und gibt den Rundungsrest dem letzten", () => {
    const first = seatShareCents(booking, 1);
    const last = seatShareCents({ ...booking, seats: 1 }, 1);

    expect(first).toEqual({ courseCents: 2649, feeCents: 50 });
    expect(last).toEqual({ courseCents: 2650, feeCents: 50 });
    // In Summe genau, was gezahlt wurde
    expect(first.courseCents + last.courseCents).toBe(5299);
  });

  it("rechnet Altbuchungen ohne aufgeschlagene Gebühr ohne Gebührenanteil", () => {
    const legacy = { ...booking, platformFeeOnTop: false, seats: 1, seatsPurchased: 1 };
    expect(seatShareCents(legacy, 1)).toEqual({ courseCents: 5399, feeCents: 0 });
  });
});

describe("resolveSeatCancellation", () => {
  const withSpots = {
    seats: 3,
    seatsPurchased: 3,
    spotIds: ["r1", "r2", "r3"],
    spotLabels: ["Reformer 1", "Reformer 2", "Reformer 3"],
  };

  it("storniert ohne Auswahl alle Plätze", () => {
    const result = resolveSeatCancellation(withSpots);
    expect(result).toMatchObject({ ok: true, value: { count: 3, cancelsAll: true } });
  });

  it("gibt bei einer reinen Anzahl die zuletzt gebuchten Geräte frei", () => {
    const result = resolveSeatCancellation(withSpots, { seats: 1 });
    expect(result).toMatchObject({
      ok: true,
      value: { count: 1, cancelsAll: false, keptSpotIds: ["r1", "r2"] },
    });
  });

  it("akzeptiert nur Geräte aus dieser Buchung", () => {
    expect(resolveSeatCancellation(withSpots, { spotIds: ["r9"] }).ok).toBe(false);
    expect(resolveSeatCancellation(withSpots, { spotIds: ["r1", "r9"] }).ok).toBe(false);
  });

  it("lehnt mehr Plätze ab, als gebucht sind", () => {
    const noSpots = { seats: 2, seatsPurchased: 3, spotIds: [], spotLabels: [] };
    expect(resolveSeatCancellation(noSpots, { seats: 3 }).ok).toBe(false);
    expect(resolveSeatCancellation(noSpots, { seats: 0 }).ok).toBe(false);
  });
});