added tests

Author: jvithlani

packages/lexical-playground/__tests__/e2e/CopyAndPaste/html/TablesHTMLCopyAndPaste.spec.mjs

@@ -386,15 +386,17 @@ test.describe('HTML Tables CopyAndPaste', () => {
           </colgroup>
           <tr>
             <th
-              class="PlaygroundEditorTheme__tableCell PlaygroundEditorTheme__tableCellHeader PlaygroundEditorTheme__tableCellSelected">
+              class="PlaygroundEditorTheme__tableCell PlaygroundEditorTheme__tableCellHeader PlaygroundEditorTheme__tableCellSelected"
+              style="background-color: rgb(242, 243, 245)">
               <p
                 class="PlaygroundEditorTheme__paragraph PlaygroundEditorTheme__ltr"
                 dir="ltr">
                 <span data-lexical-text="true">a</span>
               </p>
             </th>
             <th
-              class="PlaygroundEditorTheme__tableCell PlaygroundEditorTheme__tableCellHeader PlaygroundEditorTheme__tableCellSelected">
+              class="PlaygroundEditorTheme__tableCell PlaygroundEditorTheme__tableCellHeader PlaygroundEditorTheme__tableCellSelected"
+              style="background-color: rgb(242, 243, 245)">
               <p
                 class="PlaygroundEditorTheme__paragraph PlaygroundEditorTheme__ltr"
                 dir="ltr">
@@ -412,7 +414,8 @@ test.describe('HTML Tables CopyAndPaste', () => {
           </tr>
           <tr>
             <th
-              class="PlaygroundEditorTheme__tableCell PlaygroundEditorTheme__tableCellHeader PlaygroundEditorTheme__tableCellSelected">
+              class="PlaygroundEditorTheme__tableCell PlaygroundEditorTheme__tableCellHeader PlaygroundEditorTheme__tableCellSelected"
+              style="background-color: rgb(242, 243, 245)">
               <p
                 class="PlaygroundEditorTheme__paragraph PlaygroundEditorTheme__ltr"
                 dir="ltr">