Fix indexing issue in Compatibility Grid resize when scrolled to bottom. (#12003)

Issue #11893, cherry-pick from #11984

1 files changed, 34 insertions, 0 deletions

diff --git a/uitest/src/main/java/com/vaadin/tests/components/grid/CompatibilityGridScrollDownResize.java b/uitest/src/main/java/com/vaadin/tests/components/grid/CompatibilityGridScrollDownResize.java
new file mode 100644
index 0000000000..973598f18f
--- /dev/null
+++ b/uitest/src/main/java/com/vaadin/tests/components/grid/CompatibilityGridScrollDownResize.java
@@ -0,0 +1,34 @@
+package com.vaadin.tests.components.grid;
+
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.tests.minitutorials.v7_4.GridExampleHelper;
+import com.vaadin.ui.VerticalLayout;
+import com.vaadin.v7.ui.Grid;
+
+public class CompatibilityGridScrollDownResize extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        // container with at least 100 rows
+        final Grid grid = new Grid(GridExampleHelper.createContainer());
+        grid.setSizeFull();
+        addComponent(grid);
+        getLayout().setSizeFull();
+        getLayout().setExpandRatio(grid, 2);
+        ((VerticalLayout) getLayout().getParent()).setSizeFull();
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return 11893;
+    };
+
+    @Override
+    protected String getTestDescription() {
+        return "Scrolling all the way down, resizing the browser window smaller "
+                + "so that one row gets completely hidden, and scrolling down "
+                + "again should keep the row contents consistent and in expected "
+                + "sequence.";
+    }
+}