tddLWCCrank.test.js

import { createElement } from "lwc";
import tdd from "c/tdd";

describe("c-tdd", () => {
  afterEach(() => {
    // The jsdom instance is shared across test cases in a single file so reset the DOM
    while (document.body.firstChild) {
      document.body.removeChild(document.body.firstChild);
    }
  });
  it("renders", () => {
    // Create element
    const element = createElement("c-tdd", {
      is: tdd
    });
    document.body.appendChild(element);
  });
});