Function setupTesting

tests/utils/utils.js:73–89

(cleanUpAfterTests = true)

 * containers children
 */
export function setupTesting(cleanUpAfterTests = true) {
  let testingContainer = document.getElementById('testingContainer');

  if (!testingContainer) {
    testingContainer = document.createElement('div');
    testingContainer.id = "testingContainer";
    document.body.appendChild(testingContainer);
  }

  if (cleanUpAfterTests) {
    testingContainer.innerHTML = "";

    afterEach(function() {
      testingContainer.innerHTML = "";
    });
  }
}