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

import {
  compareRateValues,
  normalizeFractionRateDisplay,
  normalizeRateDisplay,
  parseRateLowerBound
} from "../src/shared/rate-normalizer";

describe("rate-normalizer", () => {
  test("normalizes compact ranges", () => {
    expect(normalizeRateDisplay("0.5%-1%")).toBe("0.5% - 1%");
  });

  test("normalizes ranges with missing percent on the lower bound", () => {
    expect(normalizeRateDisplay("0.02 - 0.1%")).toBe("0.02% - 0.1%");
  });

  test("parses the lower bound of a range", () => {
    expect(parseRateLowerBound("0.02% - 0.1%")).toBe(0.02);
  });

  test("treats less-than values as smaller than the boundary range", () => {
    expect(compareRateValues("<0.02%", "0.02% - 0.1%")).toBeLessThan(0);
  });

  test("orders missing values after real values", () => {
    expect(compareRateValues(null, "0.02% - 0.1%")).toBeGreaterThan(0);
  });

  test("normalizes fraction rate values into percentage display", () => {
    expect(normalizeFractionRateDisplay("0.0002")).toBe("0.02%");
    expect(normalizeFractionRateDisplay("0.0044")).toBe("0.44%");
    expect(normalizeFractionRateDisplay("0")).toBe("0%");
  });
});