Add aria-sort to Grid (#10007)

This adds basic support for aria-sort for Grid (https://www.w3.org/TR/wai-aria-1.1/#aria-sort).

- aria-sort is not added, if the column is not sortable
- aria-sort="none" is added, if the column is sortable but currently not sorted
- aria-sort="ascending" is added, if the column is sorted by asc
- aria-sort="descending" is added, if the column is sorted by desc
- aria-sort="other" is added, if more than 1 column is sorted, currently there is no aria-sort-order

1 files changed, 8 insertions, 0 deletions

diff --git a/uitest/src/test/java/com/vaadin/tests/components/grid/GridSortIndicatorTest.java b/uitest/src/test/java/com/vaadin/tests/components/grid/GridSortIndicatorTest.java
index 429e5a671e..2f623e1c51 100644
--- a/uitest/src/test/java/com/vaadin/tests/components/grid/GridSortIndicatorTest.java
+++ b/uitest/src/test/java/com/vaadin/tests/components/grid/GridSortIndicatorTest.java
@@ -35,18 +35,26 @@ public class GridSortIndicatorTest extends SingleBrowserTest {
         Assert.assertTrue("First column should be sorted ascending",
                 grid.getHeaderCell(0, 0).getAttribute("class")
                         .contains("sort-asc"));
+        Assert.assertEquals("First column should have aria-sort other", "other",
+                grid.getHeaderCell(0, 0).getAttribute("aria-sort"));
         Assert.assertEquals("First column should be first in sort order", "1",
                 grid.getHeaderCell(0, 0).getAttribute("sort-order"));
         Assert.assertTrue("Second column should be sorted ascending",
                 grid.getHeaderCell(0, 1).getAttribute("class")
                         .contains("sort-asc"));
+        Assert.assertEquals("Second column should have aria-sort other", "other",
+                grid.getHeaderCell(0, 1).getAttribute("aria-sort"));
         Assert.assertEquals("Second column should be also sorted", "2",
                 grid.getHeaderCell(0, 1).getAttribute("sort-order"));
 
         $(ButtonElement.class).caption("Sort first").first().click();
+        Assert.assertEquals("First column should have aria-sort ascending", "ascending",
+                grid.getHeaderCell(0, 0).getAttribute("aria-sort"));
         Assert.assertTrue("First column should be sorted ascending",
                 grid.getHeaderCell(0, 0).getAttribute("class")
                         .contains("sort-asc"));
+        Assert.assertEquals("Second column should have aria-sort none", "none",
+                grid.getHeaderCell(0, 1).getAttribute("aria-sort"));
         Assert.assertFalse("Second column should not be sorted",
                 grid.getHeaderCell(0, 1).getAttribute("class")
                         .contains("sort-asc"));