import containsElement from "../containsElement";

describe("containsElement", () => {
  it("should return false if either the element or target are null", () => {
    const div = document.createElement("div");
    expect(containsElement(null, null)).toBe(false);
    expect(containsElement(div, null)).toBe(false);
    expect(containsElement(null, div)).toBe(false);
  });

  it("should return true if the element contains the target", () => {
    const parent = document.createElement("div");
    parent.setAttribute("id", "parent");

    const child = document.createElement("span");
    child.setAttribute("id", "child");
    parent.appendChild(child);

    const outside = document.createElement("div");
    outside.setAttribute("id", "outside");

    expect(containsElement(parent, child)).toBe(true);
    expect(containsElement(parent, parent)).toBe(true);
    expect(containsElement(child, parent)).toBe(false);
    expect(containsElement(parent, outside)).toBe(false);
  });
});