Function rediscover

test/unit/core/context/test-node-values.js:125–131

(...nodesOrContextNodes)

  }

  function rediscover(...nodesOrContextNodes) {
    const contextNodes = nodesOrContextNodes.map((arg) =>
      arg.nodeType ? ContextNode.get(arg) : arg
    );
    contextNodes.forEach((cn) => cn.discover());
    return waitForDiscover.apply(null, contextNodes);
  }

  describe('connected, non-recursive', () => {
    let sibling1, sibling1Stub;