try to fix dataset history test

Author: dvortsovs

tests/suites/dataset/history.test.ts

@@ -120,24 +120,26 @@ datalensTest.describe('Dataset history', () => {
         const firstFieldVisibleIcon = page
             .locator(slct(DatasetFieldsTabQa.FieldVisibleColumnIcon))
             .first();
-        const visibleClassBefore = await firstFieldVisibleIcon.getAttribute('title');
+        const visibleAttributeBefore = await firstFieldVisibleIcon.getAttribute('title');
 
         // Hide first field
         await firstFieldVisibleIcon.click();
 
-        const visibleClassAfterHide = await firstFieldVisibleIcon.getAttribute('title');
-        expect(visibleClassAfterHide).not.toBe(visibleClassBefore);
+        const visibleAttributeAfterHide = await firstFieldVisibleIcon.getAttribute('title');
+        expect(visibleAttributeAfterHide).not.toBe(visibleAttributeBefore);
 
         // Undo the hide
         const undoBtn = page.locator(slct(EditHistoryQA.UndoBtn));
+        await expect(undoBtn).toBeEnabled();
         await undoBtn.click();
 
         // Redo the hide
         const redoBtn = page.locator(slct(EditHistoryQA.RedoBtn));
+        await expect(undoBtn).toBeEnabled();
         await redoBtn.click();
 
-        const visibleClassAfterRedo = await firstFieldVisibleIcon.getAttribute('title');
-        expect(visibleClassAfterRedo).toBe(visibleClassAfterHide);
+        const visibleAttributeAfterRedo = await firstFieldVisibleIcon.getAttribute('title');
+        expect(visibleAttributeAfterRedo).toBe(visibleAttributeAfterHide);
     });
 
     datalensTest('Undo and Redo restores field duplication', async ({page}) => {