Fix Grid column reorder with partially hidden joined header cells. (#12429)

1 files changed, 43 insertions, 0 deletions

diff --git a/uitest/src/main/java/com/vaadin/tests/components/grid/GridReorderMerged.java b/uitest/src/main/java/com/vaadin/tests/components/grid/GridReorderMerged.java
new file mode 100644
index 0000000000..62ddef2c97
--- /dev/null
+++ b/uitest/src/main/java/com/vaadin/tests/components/grid/GridReorderMerged.java
@@ -0,0 +1,43 @@
+package com.vaadin.tests.components.grid;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.Grid;
+import com.vaadin.ui.Grid.Column;
+import com.vaadin.ui.components.grid.HeaderRow;
+
+public class GridReorderMerged extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        Grid<String> grid = new Grid<>();
+        List<String> items = new ArrayList<>();
+        HeaderRow headerRow = grid.prependHeaderRow();
+        for (int i = 1; i < 10; ++i) {
+            String propertyId = "" + i;
+            Column<String, ?> column = grid
+                    .addColumn(item -> propertyId.equals(item) ? item : "")
+                    .setId(propertyId).setCaption(propertyId);
+            column.setHidable(true);
+            if (i == 5) {
+                column.setHidden(true);
+            }
+            items.add(propertyId);
+        }
+        grid.setItems(items);
+        headerRow.join("1", "2", "3").setText("1");
+        headerRow.join("4", "5", "6").setText("2"); // middle column hidden
+        headerRow.join("7", "8", "9").setText("3");
+        grid.setColumnReorderingAllowed(true);
+        addComponent(grid);
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Reordering columns should respect joined cells "
+                + "even when some columns are hidden.";
+    }
+}