code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you 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 org.openqa.selenium.support.pagefactory.internal;
  
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  import static org.mockito.Mockito.when;
  
  import java.lang.reflect.Proxy;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.By;
  import org.openqa.selenium.WebDriver;
  import org.openqa.selenium.WebElement;
  import org.openqa.selenium.support.CacheLookup;
  import org.openqa.selenium.support.FindBy;
  import org.openqa.selenium.support.How;
  import org.openqa.selenium.support.PageFactory;
  import org.openqa.selenium.support.pagefactory.ElementLocator;
  
  class LocatingElementHandlerTest {
  
    @Test
    void shouldAlwaysLocateTheElementPerCall() {
      final ElementLocator locator = mock(ElementLocator.class);
      final WebElement element = mock(WebElement.class);
  
      when(locator.findElement()).thenReturn(element);
  
      LocatingElementHandler handler = new LocatingElementHandler(locator);
      WebElement proxy =
          (WebElement)
              Proxy.newProxyInstance(
                  getClass().getClassLoader(), new Class[] {WebElement.class}, handler);
  
      proxy.sendKeys("Fishy");
      proxy.submit();
  
      verify(locator, times(2)).findElement();
      verify(element).sendKeys("Fishy");
      verify(element).submit();
      verifyNoMoreInteractions(locator, element);
    }
  
    @Test
    void shouldUseAnnotationsToLookUpByAlternativeMechanisms() {
      final WebDriver driver = mock(WebDriver.class);
      final WebElement element = mock(WebElement.class);
  
      final By by = By.xpath("//input[@name='q']");
  
      when(driver.findElement(by)).thenReturn(element);
  
      Page page = PageFactory.initElements(driver, Page.class);
      page.doQuery("cheese");
  
      verify(element).clear();
      verify(element).sendKeys("cheese");
      verifyNoMoreInteractions(element);
    }
  
    @Test
    void shouldNotRepeatedlyLookUpElementsMarkedAsNeverChanging() {
      final ElementLocator locator = mock(ElementLocator.class);
      final WebElement element = mock(WebElement.class);
  
      when(locator.findElement()).thenReturn(element);
  
      LocatingElementHandler handler = new LocatingElementHandler(locator);
      WebElement proxy =
          (WebElement)
              Proxy.newProxyInstance(
                  getClass().getClassLoader(), new Class[] {WebElement.class}, handler);
  
      proxy.isEnabled();
      proxy.sendKeys("Cheese");
  
      verify(element).isEnabled();
      verify(element).sendKeys("Cheese");
    }
  
    @Test
    void findByAnnotationShouldBeInherited() {
      ChildPage page = new ChildPage();
  
      final WebDriver driver = mock(WebDriver.class);
      final WebElement element = mock(WebElement.class);
  
      when(driver.findElement(By.xpath("//input[@name='q']"))).thenReturn(element);
  
      PageFactory.initElements(driver, page);
      page.doChildQuery();
  
      verify(element).getAttribute("value");
    }
  
    public static class Page {
  
      @SuppressWarnings("unused")
      private WebElement q;
  
      @FindBy(how = How.XPATH, using = "//input[@name='q']")
      protected WebElement query;
  
      @SuppressWarnings("unused")
      @FindBy(how = How.XPATH, using = "//input[@name='q']")
      @CacheLookup
      private WebElement staysTheSame;
  
      public void doQuery(String foo) {
        query.clear();
        query.sendKeys(foo);
      }
    }
  
    public static class ChildPage extends Page {
      public void doChildQuery() {
        query.getAttribute("value");
      }
    }
  }
  