Avoid client side exception using keyboard navigation (#15343).

Change-Id: Ibed97b23de72007a6ffe5450bd8c3f271447f8d1

client/src/com/vaadin/client/ui/VTree.java

@@ -1737,8 +1737,8 @@ public class VTree extends FocusElementPanel implements VHasDropHandler,
                         selectNode(node, true);
                     }
                 }
+                showTooltipForKeyboardNavigation(node);
             }
-            showTooltipForKeyboardNavigation(node);
             return true;
         }
 
@@ -1763,8 +1763,8 @@ public class VTree extends FocusElementPanel implements VHasDropHandler,
                         selectNode(node, true);
                     }
                 }
+                showTooltipForKeyboardNavigation(node);
             }
-            showTooltipForKeyboardNavigation(node);
             return true;
         }
 

uitest/src/com/vaadin/tests/components/tree/TreeKeyboardNavigationToNone.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2000-2014 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.tests.components.tree;
+
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.Button.ClickEvent;
+import com.vaadin.ui.Tree;
+
+/**
+ * Test UI for keyboard navigation for first and last tree item.
+ * 
+ * @author Vaadin Ltd
+ */
+public class TreeKeyboardNavigationToNone extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        final Tree tree = new Tree();
+        tree.addItem("a");
+        tree.addItem("b");
+
+        tree.select("a");
+        addComponents(tree);
+        tree.focus();
+
+        Button button = new Button("Select last item",
+                new Button.ClickListener() {
+
+                    @Override
+                    public void buttonClick(ClickEvent event) {
+                        tree.select("b");
+                        tree.focus();
+                    }
+                });
+        addComponent(button);
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return 15343;
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Keyboard navigation should not throw client side exception "
+                + "when there are no items to navigate.";
+    }
+
+}

uitest/src/com/vaadin/tests/components/tree/TreeKeyboardNavigationToNoneTest.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2000-2014 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.tests.components.tree;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.openqa.selenium.By;
+import org.openqa.selenium.Keys;
+import org.openqa.selenium.interactions.Actions;
+
+import com.vaadin.testbench.elements.ButtonElement;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+
+/**
+ * Test for keyboard navigation in tree in case when there are no items to
+ * navigate.
+ * 
+ * @author Vaadin Ltd
+ */
+public class TreeKeyboardNavigationToNoneTest extends MultiBrowserTest {
+
+    @Before
+    public void setUp() {
+        setDebug(true);
+        openTestURL();
+    }
+
+    @Test
+    public void navigateUpForTheFirstItem() {
+        sendKey(Keys.ARROW_UP);
+        checkNotificationErrorAbsence("first");
+    }
+
+    @Test
+    public void navigateDownForTheLastItem() {
+        $(ButtonElement.class).first().click();
+        sendKey(Keys.ARROW_DOWN);
+        checkNotificationErrorAbsence("last");
+    }
+
+    private void checkNotificationErrorAbsence(String item) {
+        Assert.assertFalse(
+                "Notification is found after using keyboard for navigation "
+                        + "from " + item + " tree item",
+                isElementPresent(By.className("v-Notification")));
+    }
+
+    private void sendKey(Keys key) {
+        Actions actions = new Actions(getDriver());
+        actions.sendKeys(key).build().perform();
+    }
+}