test: test for setup()

packages/runtime-test/src/index.ts

@@ -1,14 +1,22 @@
 import { createRenderer, VNode } from '@vue/runtime-core'
 import { nodeOps, TestElement } from './nodeOps'
 import { patchProp } from './patchProp'
+import { serializeInner } from './serialize'
 
 export const render = createRenderer({
   patchProp,
   ...nodeOps
 }) as (node: VNode | null, container: TestElement) => VNode
 
-export { serialize } from './serialize'
-export { triggerEvent } from './triggerEvent'
+// convenience for one-off render validations
+export function renderToString(vnode: VNode) {
+  const root = nodeOps.createElement('div')
+  render(vnode, root)
+  return serializeInner(root)
+}
+
+export * from './triggerEvent'
+export * from './serialize'
 export * from './nodeOps'
 export * from './jestUtils'
 export * from '@vue/runtime-core'