import { describe, it, expect } from "vitest";
import { toUnit, toMilliunits } from "../currency.js";
describe("currency utilities", () => {
describe("toUnit", () => {
it("converts milliunits to currency amount", () => {
expect(toUnit(1000)).toBe(1);
expect(toUnit(50250)).toBe(50.25);
expect(toUnit(-25000)).toBe(-25);
});
it("handles zero", () => {
expect(toUnit(0)).toBe(0);
});
it("handles large numbers", () => {
expect(toUnit(1000000000)).toBe(1000000);
});
it("handles fractional milliunits", () => {
expect(toUnit(1500)).toBe(1.5);
// Note: YNAB utility rounds to 2 decimal places for currency display
expect(toUnit(1)).toBe(0);
expect(toUnit(10)).toBe(0.01);
});
});
describe("toMilliunits", () => {
it("converts currency amount to milliunits", () => {
expect(toMilliunits(1)).toBe(1000);
expect(toMilliunits(50.25)).toBe(50250);
expect(toMilliunits(-25)).toBe(-25000);
});
it("handles zero", () => {
expect(toMilliunits(0)).toBe(0);
});
it("handles large numbers", () => {
expect(toMilliunits(1000000)).toBe(1000000000);
});
it("rounds to nearest milliunit", () => {
// 10.2556 * 1000 = 10255.6 -> rounds to 10256
expect(toMilliunits(10.2556)).toBe(10256);
// 10.2554 * 1000 = 10255.4 -> rounds to 10255
expect(toMilliunits(10.2554)).toBe(10255);
});
});
});
