import { describe, it, expect } from "vitest";
import { cn } from "../../lib/utils.js";

describe("cn", () => {
  it("joins class names", () => {
    expect(cn("a", "b")).toBe("a b");
  });

  it("drops falsy values", () => {
    expect(cn("a", false, null, undefined, "b")).toBe("a b");
  });

  it("merges conflicting tailwind classes, keeping the last", () => {
    expect(cn("p-2", "p-4")).toBe("p-4");
    expect(cn("text-red-500", "text-blue-500")).toBe("text-blue-500");
  });

  it("supports conditional object syntax", () => {
    expect(cn("base", { active: true, hidden: false })).toBe("base active");
  });
});