Correctly set style names for NativeSelect (#9006)

Fixes #9005

client/src/main/java/com/vaadin/client/ui/VNativeSelect.java

@@ -20,6 +20,7 @@ import java.util.Objects;
 import com.google.gwt.event.dom.client.HasAllFocusHandlers;
 import com.google.gwt.user.client.ui.ListBox;
 import com.vaadin.client.widgets.FocusableFlowPanelComposite;
+import com.vaadin.shared.ui.nativeselect.NativeSelectState;
 
 /**
  * The client-side widget for the {@code NativeSelect} component.
@@ -35,9 +36,17 @@ public class VNativeSelect extends FocusableFlowPanelComposite
      * Creates a new {@code VNativeSelect} instance.
      */
     public VNativeSelect() {
+        setStyleName(NativeSelectState.STYLE_NAME);
+        getListBox().setStyleName(NativeSelectState.STYLE_NAME + "-select");
         getWidget().add(listBox);
     }
 
+    @Override
+    public void setStylePrimaryName(String style) {
+        super.setStylePrimaryName(style);
+        setStylePrimaryName(listBox.getElement(), style);
+    }
+
     /**
      * Sets the selected item by its value. If given {@code null}, removes
      * selection.

client/src/main/java/com/vaadin/client/ui/nativeselect/NativeSelectConnector.java

@@ -53,8 +53,6 @@ public class NativeSelectConnector
     @Override
     protected void init() {
         super.init();
-        getWidget().getListBox()
-                .setStyleName(NativeSelectState.STYLE_NAME + "-select");
         selectionChangeRegistration = getWidget().getListBox()
                 .addChangeHandler(e -> selectionRpc
                         .select(getWidget().getListBox().getSelectedValue()));

uitest/src/test/java/com/vaadin/tests/components/nativeselect/NativeSelectStyleNamesTest.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2000-2016 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.nativeselect;
+
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.vaadin.testbench.elements.NativeSelectElement;
+import com.vaadin.tests.tb3.SingleBrowserTest;
+
+public class NativeSelectStyleNamesTest extends SingleBrowserTest {
+
+    @Override
+    protected Class<?> getUIClass() {
+        return NativeSelectInit.class;
+    }
+
+    @Test
+    public void correctStyleNames() {
+        openTestURL();
+
+        Set<String> expected = Stream.of("v-select", "v-widget")
+                .collect(Collectors.toSet());
+        Assert.assertEquals(expected,
+                $(NativeSelectElement.class).first().getClassNames());
+    }
+}