Function describeExpectedDom

packages/core/src/hydration/error_handling.ts:344–366

* Builds the string containing the expected DOM present given the LView and TNode * values for a readable error message * * @param lView the lView containing the DOM * @param tNode the tNode * @param isViewContainerAnchor boolean * @returns string

(lView: LView, tNode: TNode, isViewContainerAnchor: boolean)

 * @returns string
 */
function describeExpectedDom(lView: LView, tNode: TNode, isViewContainerAnchor: boolean): string {
  const spacer = '  ';
  let content = '';
  if (tNode.prev) {
    content += spacer + '…\n';
    content += spacer + describeTNode(tNode.prev) + '\n';
  } else if (tNode.type && tNode.type & TNodeType.AnyContainer) {
    content += spacer + '…\n';
  }
  if (isViewContainerAnchor) {
    content += spacer + describeTNode(tNode) + '\n';
    content += spacer + `<!-- container -->  ${AT_THIS_LOCATION}\n`;
  } else {
    content += spacer + describeTNode(tNode) + `  ${AT_THIS_LOCATION}\n`;
  }
  content += spacer + '…\n';

  const parentRNode = tNode.type ? getParentRElement(lView[TVIEW], tNode, lView) : null;
  if (parentRNode) {
    content = describeRNode(parentRNode as unknown as Node, '\n' + content);
  }
  return content;
}

/**
 * Builds the string containing the DOM present around a given RNode for a