fix(markdownrender): add async wait for markdown evaluation in tests

MarkdownRender component evaluates markdown content asynchronously in
componentDidMount. The tests were asserting immediately after mount
without waiting for the async evaluation to complete, causing all 4
table-related tests to fail.

Added sleep(100) and render.update() after mount to ensure the async
markdown parsing completes before assertions.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: SudoUserReal

packages/semi-ui/markdownRender/__test__/markdown.test.js

@@ -2,6 +2,7 @@ import MarkdownRender from '../index'
 import React from 'react';
 import { mount } from 'enzyme';
 import { BASE_CLASS_PREFIX } from '@douyinfe/semi-foundation/base/constants';
+import { sleep } from '../../_test_/utils';
 
 
 describe(`MarkdownRender`, () => {
@@ -17,6 +18,10 @@ describe(`MarkdownRender`, () => {
             <MarkdownRender raw={content} />
         );
 
+        // wait for async markdown evaluation to complete
+        await sleep(100);
+        render.update();
+
         // check if has table container
         expect(render.exists(`.${BASE_CLASS_PREFIX}-table-container`)).toEqual(true);
         // check if has table head & body
@@ -36,6 +41,10 @@ describe(`MarkdownRender`, () => {
             <MarkdownRender raw={content} />
         );
 
+        // wait for async markdown evaluation to complete
+        await sleep(100);
+        render.update();
+
         // check if has table container
         expect(render.exists(`.${BASE_CLASS_PREFIX}-table-container`)).toEqual(true);
         // check if has table head & body
@@ -55,6 +64,10 @@ describe(`MarkdownRender`, () => {
             <MarkdownRender raw={content} />
         );
 
+        // wait for async markdown evaluation to complete
+        await sleep(100);
+        render.update();
+
         // check if has table container
         expect(render.exists(`.${BASE_CLASS_PREFIX}-table-container`)).toEqual(true);
         // check if has table head & body
@@ -84,6 +97,10 @@ describe(`MarkdownRender`, () => {
             <MarkdownRender raw={content} format="mdx"/>
         );
 
+        // wait for async markdown evaluation to complete
+        await sleep(100);
+        render.update();
+
         // check if has table container
         expect(render.exists(`.${BASE_CLASS_PREFIX}-table-container`)).toEqual(true);
         // check if has table head & body