import { describe, expect, it } from "vitest";
import { parseCbzPageLocator, parsePdfPageLocator, pdfPagePercent } from "./locators";

describe("reader locators", () => {
  it("parses valid PDF page locators", () => {
    expect(parsePdfPageLocator("pdf:page:12")).toBe(12);
  });

  it("ignores invalid PDF locators", () => {
    expect(parsePdfPageLocator("epub:start")).toBeNull();
    expect(parsePdfPageLocator("pdf:page:0")).toBeNull();
  });

  it("parses CBZ page locators", () => {
    expect(parseCbzPageLocator("cbz:page:7")).toBe(7);
    expect(parseCbzPageLocator("pdf:page:7")).toBeNull();
  });

  it("bounds PDF page percentages", () => {
    expect(pdfPagePercent(2, 4)).toBe(50);
    expect(pdfPagePercent(8, 4)).toBe(100);
    expect(pdfPagePercent(1, 0)).toBe(0);
  });
});