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noora

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A component library for Phoenix LiveView applications

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noora js formatters.test.js
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js/formatters.test.js 

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

import { formatHours } from "./formatters.js";



describe("formatHours", () => {

  describe("basic formatting", () => {

    it("formats fractional hours as rounded hours", () => {

      expect(formatHours(0.5)).toBe("1h");

      expect(formatHours(0.25)).toBe("0h");

      expect(formatHours(0.75)).toBe("1h");

    });



    it("rounds to nearest hour", () => {

      expect(formatHours(0.4)).toBe("0h");

      expect(formatHours(0.6)).toBe("1h");

    });



    it("handles zero hours", () => {

      expect(formatHours(0)).toBe("0h");

    });



    it("handles very small values", () => {

      expect(formatHours(0.001)).toBe("0h");

      expect(formatHours(0.4)).toBe("0h");

    });



    it("formats whole hours", () => {

      expect(formatHours(1)).toBe("1h");

      expect(formatHours(5)).toBe("5h");

      expect(formatHours(12)).toBe("12h");

      expect(formatHours(23)).toBe("23h");

    });



    it("rounds fractional hours to nearest whole hour", () => {

      expect(formatHours(1.3)).toBe("1h");

      expect(formatHours(1.5)).toBe("2h");

      expect(formatHours(2.7)).toBe("3h");

      expect(formatHours(12.1)).toBe("12h");

    });

  });



  describe("large values", () => {

    it("formats hours >= 24 as hours only", () => {

      expect(formatHours(24)).toBe("24h");

      expect(formatHours(25)).toBe("25h");

      expect(formatHours(25.5)).toBe("26h");

      expect(formatHours(48)).toBe("48h");

      expect(formatHours(72)).toBe("72h");

    });



    it("rounds fractional hours to nearest whole hour", () => {

      expect(formatHours(24.3)).toBe("24h");

      expect(formatHours(24.6)).toBe("25h");

      expect(formatHours(25.7)).toBe("26h");

    });



    it("handles very large values", () => {

      expect(formatHours(168)).toBe("168h"); // 1 week

      expect(formatHours(720)).toBe("720h"); // 30 days

      expect(formatHours(8760)).toBe("8760h"); // 1 year

    });

  });



  describe("edge cases", () => {

    it("handles negative values gracefully", () => {

      expect(formatHours(-1)).toBe("-1h");

      expect(formatHours(-24)).toBe("-24h");

      expect(formatHours(-25.5)).toBe("-25h");

    });



    it("handles decimal precision edge cases", () => {

      expect(formatHours(1.9999)).toBe("2h");

      expect(formatHours(0.99999)).toBe("1h");

      expect(formatHours(23.9999)).toBe("24h");

    });

  });

});