Function elementText

packages/private/testing/matchers/index.ts:194–227

(n: any)

});

function elementText(n: any): string {
  const hasNodes = (n: any) => {
    const children = n.childNodes;
    return children && children.length > 0;
  };

  if (n instanceof Array) {
    return n.map(elementText).join('');
  }

  if (isCommentNode(n)) {
    return '';
  }

  if (getDOM().isElementNode(n)) {
    const tagName = (n as Element).tagName;

    if (tagName === 'CONTENT') {
      return elementText(Array.prototype.slice.apply((<any>n).getDistributedNodes()));
    } else if (tagName === 'SLOT') {
      return elementText(Array.prototype.slice.apply((<any>n).assignedNodes()));
    }
  }

  if (hasShadowRoot(n)) {
    return elementText(childNodesAsList((<any>n).shadowRoot));
  }

  if (hasNodes(n)) {
    return elementText(childNodesAsList(n));
  }

  return (n as any).textContent;
}

function hasShadowRoot(node: any): boolean {
  return node.shadowRoot != null && node instanceof HTMLElement;