app/src/__tests__/schema-nan.test.ts

import { describe, it, expect } from "vitest";
import { CreateOrderSchema } from "../schemas/orders.schema";
import { CreateQuotationSchema } from "../schemas/offers.schema";

describe("Zod NaN rejection", () => {
  describe("CreateOrderSchema", () => {
    it("rejects NaN string in quantity", () => {
      const result = CreateOrderSchema.safeParse({
        customer_id: 1,
        items: [{ quantity: "not-a-number" }],
      });
      expect(result.success).toBe(false);
    });

    it("rejects NaN string in unit_price", () => {
      const result = CreateOrderSchema.safeParse({
        customer_id: 1,
        items: [{ unit_price: "abc" }],
      });
      expect(result.success).toBe(false);
    });

    it("accepts valid numbers", () => {
      const result = CreateOrderSchema.safeParse({
        customer_id: 1,
        items: [{ quantity: 2, unit_price: 100 }],
      });
      expect(result.success).toBe(true);
    });
  });

  describe("CreateQuotationSchema", () => {
    it("rejects NaN string in top-level vat_rate", () => {
      const result = CreateQuotationSchema.safeParse({
        customer_id: 1,
        vat_rate: "bad",
      });
      expect(result.success).toBe(false);
    });

    it("accepts valid vat_rate", () => {
      const result = CreateQuotationSchema.safeParse({
        customer_id: 1,
        vat_rate: 21,
      });
      expect(result.success).toBe(true);
    });

    it("rejects NaN string in item quantity", () => {
      const result = CreateQuotationSchema.safeParse({
        customer_id: 1,
        items: [{ quantity: "bad" }],
      });
      expect(result.success).toBe(false);
    });
  });
});