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

import { finalizePercentInput, isValidPercent, normalizePercentInput } from "@/lib/guides/percent-input";

describe("percentage input", () => {
  it.each([
    ["-9999", true],
    ["9999", true],
    ["0", true],
    ["12.5", true],
    ["-12.5", true],
    [" 100 ", true],
    ["1e2", true],
    ["", false],
    [" \t\n", false],
    ["-", false],
    ["invalid", false],
    ["NaN", false],
    ["Infinity", false],
    ["-Infinity", false],
    ["9999.01", false],
    ["-9999.01", false],
  ])("validates %j as %s", (value, valid) => {
    expect(isValidPercent(value)).toBe(valid);
  });

  it("turns only a lone dash into zero when editing finishes", () => {
    expect(normalizePercentInput("-")).toBe("-");
    expect(finalizePercentInput("-")).toBe("0");
    expect(finalizePercentInput("-20")).toBe("-20");
  });

  it("keeps positive and negative decimal input and ignores other text", () => {
    expect(normalizePercentInput("12.5")).toBe("12.5");
    expect(normalizePercentInput("-12.5")).toBe("-12.5");
    expect(normalizePercentInput("invalid", "12")).toBe("12");
  });
});