[docs] Warn about the valueGetter and valueFormatter signature ch…

…ange (#14613)

docs/data/data-grid/column-definition/column-definition.md

@@ -33,6 +33,12 @@ But for some columns, it can be useful to manually get and format the value to r
 
 ### Value getter
 
+:::warning
+Note that the signature of `valueGetter` has changed in v7 – see the [migration guide](https://mui.com/x/migration/migration-data-grid-v6/) for details.
+
+If you're using v6, please use the [v6 documentation](https://v6.mui.com/x/react-data-grid/column-definition/#value-getter).
+:::
+
 Sometimes a column might not have a desired value.
 You can use the `valueGetter` attribute of `GridColDef` to:
 
@@ -102,6 +108,12 @@ The value passed to the `groupingValueGetter` is the raw row value (`row[field]`
 
 ### Value formatter
 
+:::warning
+Note that the signature of `valueFormatter` has changed in v7 – see the [migration guide](https://mui.com/x/migration/migration-data-grid-v6/) for details.
+
+If you're using v6, please use the [v6 documentation](https://v6.mui.com/x/react-data-grid/column-definition/#value-formatter).
+:::
+
 The value formatter allows you to convert the value before displaying it.
 Common use cases include converting a JavaScript `Date` object to a date string or a `Number` into a formatted number (for example "1,000.50").
 

packages/x-data-grid-pro/src/tests/infiniteLoader.DataGridPro.test.tsx

@@ -198,14 +198,14 @@ describe('<DataGridPro /> - Infnite loader', () => {
     }
     const { container } = render(<TestCase rows={baseRows} pinnedRows={basePinnedRows} />);
     const virtualScroller = container.querySelector('.MuiDataGrid-virtualScroller')!;
-    await sleep(1);
     // after initial render and a scroll event that did not reach the bottom of the grid
     // the `onRowsScrollEnd` should not be called
     expect(handleRowsScrollEnd.callCount).to.equal(0);
     // arbitrary number to make sure that the bottom of the grid window is reached.
     virtualScroller.scrollTop = 12345;
     virtualScroller.dispatchEvent(new Event('scroll'));
-    await sleep(1);
-    expect(handleRowsScrollEnd.callCount).to.equal(1);
+    await waitFor(() => {
+      expect(handleRowsScrollEnd.callCount).to.equal(1);
+    });
   });
 });