T1321834 - DataGrid – Incorrect tooltip on the column header if it too narrow and has sort index

[dmirgaev]

No description provided.

[Copilot]

Pull request overview

Fixes DataGrid header-cell hint text so that, when sort indexes are shown and the header is narrow, the tooltip displays the column caption (instead of the sort index text from the hovered indicator element).

Changes:

• Update cell-hint tooltip text selection for header rows to prefer column.caption over the hovered element’s text.
• Add Jest coverage for cellHintEnabled tooltip behavior (header sort index indicator vs. non-header cells).
• Extend the header cell test model to expose the sort-index icon element.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
packages/devextreme/js/__internal/grids/grid_core/views/m_columns_view.ts	Adjusts tooltip text logic to use the column caption for header rows.
packages/devextreme/js/__internal/grids/grid_core/column_headers/__tests__/m_column_headers.test.ts	Adds tests ensuring tooltip shows caption for sort index indicator and cell text for data cells.
packages/devextreme/js/__internal/grids/grid_core/__tests__/__mock__/model/cell/header_cell.ts	Adds a helper to locate the sort-index icon within a header cell for tests.