/**
 * Unit tests for escapeHtml edge cases.
 */

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

describe("escapeHtml", () => {
  it("escapes ampersand", () => {
    expect(escapeHtml("a & b")).toBe("a & b");
  });

  it("escapes less-than and greater-than", () => {
    expect(escapeHtml("<script>")).toBe("&lt;script&gt;");
  });

  it("escapes double quote", () => {
    expect(escapeHtml('say "hello"')).toBe("say &quot;hello&quot;");
  });

  it("escapes single quote", () => {
    expect(escapeHtml("it's")).toBe("it&#39;s");
  });

  it("escapes all special chars together", () => {
    expect(escapeHtml('&<>"\'')).toBe("&amp;&lt;&gt;&quot;&#39;");
  });

  it("returns unchanged string when no special chars", () => {
    expect(escapeHtml("plain text")).toBe("plain text");
  });

  it("handles empty string", () => {
    expect(escapeHtml("")).toBe("");
  });

  it("coerces non-string to string", () => {
    expect(escapeHtml(123)).toBe("123");
    expect(escapeHtml(null)).toBe("null");
    expect(escapeHtml(undefined)).toBe("undefined");
  });
});