import { describe, expect, it } from "vitest";
import { formatMoney, formatShare } from "./display";

describe("portfolio display helpers", () => {
	it("formats decimal strings without financial arithmetic", () => {
		expect(formatMoney({ value: "-1234567.89", currency: "RUB" })).toBe(
			"-1 234 567,89 ₽",
		);
		expect(formatMoney({ value: "10", currency: "RUB" })).toBe("10 ₽");
		expect(formatMoney({ value: "0.5", currency: "USD" })).toBe("0,5 USD");
		expect(formatMoney(null)).toBe("—");
	});

	it("formats a share as a display-only percentage", () => {
		expect(
			formatShare(
				{ currency: "RUB", value: "150" },
				{ currency: "RUB", value: "1000" },
			),
		).toBe("15 %");
		expect(
			formatShare(
				{ currency: "RUB", value: "123.45" },
				{ currency: "RUB", value: "999.99" },
			),
		).toBe("12,3 %");
		expect(formatShare(null, { currency: "RUB", value: "100" })).toBeNull();
		expect(formatShare({ currency: "RUB", value: "100" }, null)).toBeNull();
		expect(
			formatShare(
				{ currency: "RUB", value: "100" },
				{ currency: "RUB", value: "0" },
			),
		).toBeNull();
	});
});