pick tests from https://github.com/vaadin/framework/pull/11092

uitest/src/main/java/com/vaadin/tests/components/grid/GridEditorScrollSync.java

@@ -0,0 +1,35 @@
+package com.vaadin.tests.components.grid;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.v7.ui.Grid;
+public class GridEditorScrollSync extends AbstractTestUI {
+    @Override
+    protected void setup(VaadinRequest request) {
+        // Create a grid
+        Grid grid = new Grid();
+        grid.setEditorEnabled(true);
+        grid.setEditorBuffered(false);
+        // Define some columns
+        grid.addColumn("name", String.class);
+        grid.addColumn("born", Integer.class);
+        grid.addColumn("name1", String.class);
+        grid.addColumn("born1", Integer.class);
+        grid.addColumn("name2", String.class);
+        grid.addColumn("born2", Integer.class);
+        grid.addColumn("name3", String.class);
+        grid.addColumn("born3", Integer.class);
+        grid.addColumn("name4", String.class);
+        grid.addColumn("born4", Integer.class);
+        grid.setWidth("450px");
+        // Add some data rows
+        grid.addRow("Nicolaus Copernicus", 1543, "Nicolaus Copernicus", 1543,
+            "Nicolaus Copernicus", 1543, "Nicolaus Copernicus", 1543,
+            "Nicolaus Copernicus", 1543);
+        grid.addRow("Galileo Galilei", 1564, "Galileo Galilei", 1564,
+            "Galileo Galilei", 1564, "s", 55, "Nicolaus Copernicus", 1543);
+        grid.addRow("Johannes Kepler", 1571, "Johannes Kepler", 1571,
+            "Johannes Kepler", 1571, "Nicolaus Copernicus", 1543,
+            "Nicolaus Copernicus", 1543);
+        getLayout().addComponent(grid);
+    }
+}

uitest/src/test/java/com/vaadin/tests/components/grid/GridEditorScrollSyncTest.java

@@ -0,0 +1,35 @@
+package com.vaadin.tests.components.grid;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.number.IsCloseTo.closeTo;
+import org.junit.Assert;
+import org.junit.Test;
+import org.openqa.selenium.By;
+import com.vaadin.testbench.TestBenchElement;
+import com.vaadin.testbench.elements.GridElement;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+public class GridEditorScrollSyncTest extends MultiBrowserTest {
+    private GridElement grid;
+    @Test
+    public void testScrollAndEdit() {
+        openTestURL();
+        grid = $(GridElement.class).first();
+        ((TestBenchElement) grid
+            .findElement(By.className("v-grid-scroller-horizontal")))
+            .scrollLeft(300);
+        openEditor();
+        GridElement.GridCellElement rowCell = grid.getCell(1, 6);
+        TestBenchElement editorField = grid.getEditor().getField(6);
+        assertPosition(rowCell.getLocation().getX(),
+            editorField.getWrappedElement().getLocation().getX());
+    }
+    private GridElement openEditor() {
+        grid.getCell(0, 6).doubleClick();
+        Assert.assertTrue("Grid editor should be displayed.",
+            grid.getEditor().isDisplayed());
+        return grid;
+    }
+    private void assertPosition(double expected, double actual) {
+        // 1px leeway for calculations
+        assertThat("Unexpected position.", expected, closeTo(actual, 1d));
+    }
+}