Add class name for not editable editor cells (#18021)

Change-Id: I6d5ef1a125ae1739b0e3de49eac2f68ba66afb05

client/src/com/vaadin/client/widgets/Grid.java

@@ -1050,6 +1050,7 @@ public class Grid<T> extends ResizeComposite implements
         public static final int KEYCODE_HIDE = KeyCodes.KEY_ESCAPE;
 
         private static final String ERROR_CLASS_NAME = "error";
+        private static final String NOT_EDITABLE_CLASS_NAME = "not-editable";
 
         protected enum State {
             INACTIVE, ACTIVATING, BINDING, ACTIVE, SAVING
@@ -1433,6 +1434,8 @@ public class Grid<T> extends ResizeComposite implements
                         columnToWidget.put(column, editor);
                         attachWidget(editor, cell);
                     }
+                } else {
+                    cell.addClassName(NOT_EDITABLE_CLASS_NAME);
                 }
             }
 

uitest/src/com/vaadin/tests/components/grid/basicfeatures/server/GridEditorTest.java

@@ -298,8 +298,16 @@ public class GridEditorTest extends GridBasicFeaturesTest {
         selectMenuPath(EDIT_ITEM_5);
         assertEditorOpen();
 
+        GridEditorElement editor = getGridElement().getEditor();
         assertFalse("Uneditable column should not have an editor widget",
-                getGridElement().getEditor().isEditable(3));
+                editor.isEditable(3));
+        assertEquals(
+                "Not editable cell did not contain correct classname",
+                "not-editable",
+                editor.findElement(By.className("v-grid-editor-cells"))
+                        .findElements(By.xpath("./div")).get(3)
+                        .getAttribute("class"));
+
     }
 
     private WebElement getSaveButton() {