Kuma/tests/products/product-schema.test.ts

import { describe, it, expect } from "vitest";
import { productSchema, type ProductInput } from "@/src/modules/products/schemas/product-schema";
import { cardServiceFeeCents, pricePerUnitCents } from "@/src/modules/products/lib/card-pricing";

const valid: ProductInput = {
  name: "10er-Karte",
  description: "",
  credits: 10,
  priceCents: 12000,
  validityMonths: 6,
  sports: ["pilates", "pilates", "yoga"],
  design: { style: "solid", color: "#112233", secondaryColor: "#445566", imageUrl: null },
  isActive: true,
};

describe("productSchema", () => {
  it("normalisiert leere Beschreibung zu null und entfernt doppelte Kursarten", () => {
    const result = productSchema.safeParse(valid);
    expect(result.success).toBe(true);
    if (result.success) {
      expect(result.data.description).toBeNull();
      expect(result.data.sports).toEqual(["pilates", "yoga"]);
    }
  });

  it.each([
    ["0 Einheiten", { credits: 0 }],
    ["101 Einheiten", { credits: 101 }],
    ["halbe Einheiten", { credits: 2.5 }],
    ["Preis unter 1 €", { priceCents: 99 }],
    ["leerer Name", { name: "   " }],
    ["0 Monate gültig", { validityMonths: 0 }],
  ])("lehnt %s ab", (_label, patch) => {
    expect(productSchema.safeParse({ ...valid, ...patch }).success).toBe(false);
  });

  it("meldet leere Zahlenfelder auf Deutsch statt als NaN", () => {
    const result = productSchema.safeParse({ ...valid, priceCents: Number.NaN });
    expect(result.success).toBe(false);
    if (!result.success) {
      expect(result.error.issues[0].message).toBe("Bitte gib einen Preis an");
    }
  });

  it("erlaubt unbegrenzte Gültigkeit", () => {
    expect(productSchema.safeParse({ ...valid, validityMonths: null }).success).toBe(true);
  });
});

describe("card-pricing", () => {
  it("berechnet die Servicegebühr pro Einheit", () => {
    expect(cardServiceFeeCents(10, 50)).toBe(500);
  });

  it("rundet den Preis pro Einheit auf ganze Cents", () => {
    expect(pricePerUnitCents(10000, 3)).toBe(3333);
  });
});