/// <reference types="node" />

import { describe, expect, test } from "vitest";

import { BaseRates } from "../../src/utils/rates/base-rates";

/**
 * Minimal concrete adapter used only for testing BaseRates helpers.
 */
class TestRatesAdapter extends BaseRates {
  public async start(): Promise<void> {
    return;
  }

  public async stop(): Promise<void> {
    return;
  }

  public async listPairs(): Promise<Set<string>> {
    return new Set(["USD/BCH", "DOGE/BCH"]);
  }
}

describe("BaseRates.formatCurrency", () => {
  test("formats ISO currency codes with Intl currency style", () => {
    const rates = new TestRatesAdapter();
    const formatted = rates.formatCurrency(12.5, "USD");

    expect(formatted).toContain("$");
    expect(formatted).toContain("12.50");
  });

  test("formats non-ISO symbols without throwing", () => {
    const rates = new TestRatesAdapter();
    const formatted = rates.formatCurrency(12.3456789, "DOGE");

    expect(formatted).toContain("DOGE");
    expect(formatted).toContain("12.3456789");
  });
});