chore: fix isValidElement

Author: tangjinzhou

components/_util/props-util.js

@@ -252,7 +252,11 @@ export function mergeProps () {
 }
 
 function isValidElement (element) {
-  return element && typeof element === 'object' && ('componentOptions' in element && 'context' in element)
+  return element &&
+    typeof element === 'object' &&
+    'componentOptions' in element &&
+    'context' in element &&
+    element.tag !== undefined // remove text node
 }
 
 export {

components/tooltip/__tests__/__snapshots__/demo.test.js.snap

@@ -4,7 +4,11 @@ exports[`renders ./components/tooltip/demo/arrow-point-at-center.md correctly 1`
 
 exports[`renders ./components/tooltip/demo/auto-adjust-overflow.md correctly 1`] = `<div style="overflow: hidden; position: relative; padding: 24px; border: 1px solid #e9e9e9;"><button type="button" class="ant-btn ant-btn-default"><span>Adjust automatically / 自动调整</span></button> <br> <button type="button" class="ant-btn ant-btn-default" style="margin-top: 10px;"><span>Ingore / 不处理</span></button></div>`;
 
-exports[`renders ./components/tooltip/demo/basic.md correctly 1`] = `undefined`;
+exports[`renders ./components/tooltip/demo/basic.md correctly 1`] = `
+<span class="">
+  Tooltip will show when mouse enter.
+</span>
+`;
 
 exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
 <div id="components-a-tooltip-demo-placement">