Function insert

packages/runtime-test/src/nodeOps.ts:140–171

(
  child: TestNode,
  parent: TestElement,
  ref?: TestNode | null,
)

}

function insert(
  child: TestNode,
  parent: TestElement,
  ref?: TestNode | null,
): void {
  let refIndex
  if (ref) {
    refIndex = parent.children.indexOf(ref)
    if (refIndex === -1) {
      console.error('ref: ', ref)
      console.error('parent: ', parent)
      throw new Error('ref is not a child of parent')
    }
  }
  logNodeOp({
    type: NodeOpTypes.INSERT,
    targetNode: child,
    parentNode: parent,
    refNode: ref,
  })
  // remove the node first, but don't log it as a REMOVE op
  remove(child, false)
  // re-calculate the ref index because the child's removal may have affected it
  refIndex = ref ? parent.children.indexOf(ref) : -1
  if (refIndex === -1) {
    parent.children.push(child)
    child.parentNode = parent
  } else {
    parent.children.splice(refIndex, 0, child)
    child.parentNode = parent
  }
}

function remove(child: TestNode, logOp = true): void {
  const parent = child.parentNode