testAssertHtmlMismatchExtraActualAfterElement() {
    root.innerHTML = '<br>def';

    // Should fail due to extra actual nodes
    const e = assertThrowsJsUnitException(/**
                                             @suppress {checkTypes} suppression
                                             added to enable type checking
                                           */
                                          () => {
                                            testingDom.assertHtmlContentsMatch(
                                                '<br>', root);
                                          });
    assertContains('Finished expected HTML before', e.message);
  }
@suppress {checkTypes} suppression
                                             added to enable type checking