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.decorators;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  import static org.mockito.ArgumentMatchers.any;
  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 static org.mockito.Mockito.withSettings;
  
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.function.Consumer;
  import java.util.function.Function;
  import org.junit.jupiter.api.Tag;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.By;
  import org.openqa.selenium.JavascriptExecutor;
  import org.openqa.selenium.NoSuchElementException;
  import org.openqa.selenium.OutputType;
  import org.openqa.selenium.TakesScreenshot;
  import org.openqa.selenium.WebDriver;
  import org.openqa.selenium.WebElement;
  import org.openqa.selenium.interactions.Interactive;
  import org.openqa.selenium.virtualauthenticator.HasVirtualAuthenticator;
  import org.openqa.selenium.virtualauthenticator.VirtualAuthenticator;
  import org.openqa.selenium.virtualauthenticator.VirtualAuthenticatorOptions;
  
  @Tag("UnitTests")
  class DecoratedWebDriverTest {
  
    private static class Fixture {
  
      WebDriver original;
      VirtualAuthenticator originalAuth;
      WebDriver decorated;
  
      public Fixture() {
        original =
            mock(
                WebDriver.class,
                withSettings()
                    .extraInterfaces(
                        JavascriptExecutor.class, TakesScreenshot.class,
                        Interactive.class, HasVirtualAuthenticator.class));
        originalAuth = mock(VirtualAuthenticator.class);
        decorated = new WebDriverDecorator().decorate(original);
        when(((HasVirtualAuthenticator) original).addVirtualAuthenticator(any()))
            .thenReturn(originalAuth);
      }
    }
  
    @Test
    void shouldDecorate() {
      Fixture fixture = new Fixture();
      assertThat(fixture.decorated).isNotSameAs(fixture.original);
    }
  
    @Test
    void canConvertDecoratedToString() {
      Fixture fixture = new Fixture();
      when(fixture.original.toString()).thenReturn("driver");
      assertThat(fixture.decorated.toString()).isEqualTo("Decorated {driver}");
    }
  
    @Test
    void canCompareDecorated() {
      WebDriver original1 = mock(WebDriver.class);
      WebDriver original2 = mock(WebDriver.class);
  
      WebDriver decorated1 = new WebDriverDecorator<>().decorate(original1);
      WebDriver decorated2 = new WebDriverDecorator<>().decorate(original1);
      WebDriver decorated3 = new WebDriverDecorator<>().decorate(original2);
      assertThat(decorated1).isEqualTo(decorated2);
      assertThat(decorated1).isNotEqualTo(decorated3);
  
      assertThat(decorated1).isEqualTo(original1);
      assertThat(decorated1).isNotEqualTo(original2);
  
      assertThat(decorated1).isNotEqualTo("test");
    }
  
    @Test
    void testHashCode() {
      WebDriver original = mock(WebDriver.class);
      WebDriver decorated = new WebDriverDecorator<>().decorate(original);
      assertThat(decorated.hashCode()).isEqualTo(original.hashCode());
    }
  
    private void verifyFunction(Consumer<WebDriver> f) {
      Fixture fixture = new Fixture();
      f.accept(fixture.decorated);
      f.accept(verify(fixture.original, times(1)));
      verifyNoMoreInteractions(fixture.original);
    }
  
    private <R> void verifyFunction(Function<WebDriver, R> f, R result) {
      Fixture fixture = new Fixture();
      when(f.apply(fixture.original)).thenReturn(result);
      assertThat(f.apply(fixture.decorated)).isEqualTo(result);
      R ignore = f.apply(verify(fixture.original, times(1)));
      verifyNoMoreInteractions(fixture.original);
    }
  
    private <R> void verifyDecoratingFunction(Function<WebDriver, R> f, R result, Consumer<R> p) {
      Fixture fixture = new Fixture();
      when(f.apply(fixture.original)).thenReturn(result);
  
      R proxy = f.apply(fixture.decorated);
      assertThat(result).isNotSameAs(proxy);
      R ignore = f.apply(verify(fixture.original, times(1)));
      verifyNoMoreInteractions(fixture.original);
  
      p.accept(proxy);
      p.accept(verify(result, times(1)));
      verifyNoMoreInteractions(result);
    }
  
    @Test
    void get() {
      verifyFunction(d -> d.get("http://selenium.dev/"));
    }
  
    @Test
    void getCurrentUrl() {
      verifyFunction(WebDriver::getCurrentUrl, "http://selenium2.ru/");
    }
  
    @Test
    void getTitle() {
      verifyFunction(WebDriver::getTitle, "test");
    }
  
    @Test
    void getPageSource() {
      verifyFunction(WebDriver::getPageSource, "test");
    }
  
    @Test
    void findElement() {
      final WebElement found = mock(WebElement.class);
      verifyDecoratingFunction($ -> $.findElement(By.id("test")), found, WebElement::click);
    }
  
    @Test
    void findElementNotFound() {
      Fixture fixture = new Fixture();
      when(fixture.original.findElement(any())).thenThrow(NoSuchElementException.class);
  
      assertThatExceptionOfType(NoSuchElementException.class)
          .isThrownBy(() -> fixture.decorated.findElement(By.id("test")));
    }
  
    @Test
    void findElements() {
      Fixture fixture = new Fixture();
      WebElement originalElement1 = mock(WebElement.class);
      WebElement originalElement2 = mock(WebElement.class);
      List<WebElement> list = new ArrayList<>();
      list.add(originalElement1);
      list.add(originalElement2);
      when(fixture.original.findElements(By.id("test"))).thenReturn(list);
  
      List<WebElement> decoratedElementList = fixture.decorated.findElements(By.id("test"));
      assertThat(originalElement1).isNotSameAs(decoratedElementList.get(0));
      assertThat(originalElement2).isNotSameAs(decoratedElementList.get(1));
      verify(fixture.original, times(1)).findElements(By.id("test"));
  
      decoratedElementList.get(0).isDisplayed();
      decoratedElementList.get(1).click();
      verify(originalElement1, times(1)).isDisplayed();
      verify(originalElement2, times(1)).click();
      verifyNoMoreInteractions(fixture.original);
      verifyNoMoreInteractions(originalElement1);
      verifyNoMoreInteractions(originalElement2);
    }
  
    @Test
    void close() {
      verifyFunction(WebDriver::close);
    }
  
    @Test
    void quit() {
      verifyFunction(WebDriver::quit);
    }
  
    @Test
    void getWindowHandle() {
      verifyFunction(WebDriver::getWindowHandle, "test");
    }
  
    @Test
    void getWindowHandles() {
      Set<String> handles = new HashSet<>();
      handles.add("test");
      verifyFunction(WebDriver::getWindowHandles, handles);
    }
  
    @Test
    void switchTo() {
      final WebDriver.TargetLocator target = mock(WebDriver.TargetLocator.class);
      verifyDecoratingFunction(WebDriver::switchTo, target, WebDriver.TargetLocator::defaultContent);
    }
  
    @Test
    void navigate() {
      final WebDriver.Navigation navigation = mock(WebDriver.Navigation.class);
      verifyDecoratingFunction(WebDriver::navigate, navigation, WebDriver.Navigation::refresh);
    }
  
    @Test
    void manage() {
      final WebDriver.Options options = mock(WebDriver.Options.class);
      verifyDecoratingFunction(WebDriver::manage, options, WebDriver.Options::deleteAllCookies);
    }
  
    @Test
    void executeScriptThatReturnsAPrimitive() {
      verifyFunction($ -> ((JavascriptExecutor) $).executeScript("..."), 1);
    }
  
    @Test
    void executeScriptThatReturnsAnElement() {
      WebElement element = mock(WebElement.class);
      verifyDecoratingFunction(
          $ -> (WebElement) ((JavascriptExecutor) $).executeScript("..."),
          element,
          WebElement::click);
    }
  
    @Test
    void executeAsyncScriptThatReturnsAPrimitive() {
      verifyFunction($ -> ((JavascriptExecutor) $).executeAsyncScript("..."), 1);
    }
  
    @Test
    void executeAsyncScriptThatReturnsAnElement() {
      WebElement element = mock(WebElement.class);
      verifyDecoratingFunction(
          $ -> (WebElement) ((JavascriptExecutor) $).executeAsyncScript("..."),
          element,
          WebElement::click);
    }
  
    @Test
    void getScreenshotAs() {
      verifyFunction($ -> ((TakesScreenshot) $).getScreenshotAs(OutputType.BASE64), "");
    }
  
    @Test
    void perform() {
      verifyFunction($ -> ((Interactive) $).perform(new ArrayList<>()));
    }
  
    @Test
    void resetInputState() {
      verifyFunction($ -> ((Interactive) $).resetInputState());
    }
  
    @Test
    void addVirtualAuthenticator() {
      VirtualAuthenticatorOptions options = new VirtualAuthenticatorOptions();
      verifyFunction($ -> ((HasVirtualAuthenticator) $).addVirtualAuthenticator(options));
    }
  
    @Test
    void removeVirtualAuthenticator() {
      VirtualAuthenticator auth = mock(VirtualAuthenticator.class);
      verifyFunction($ -> ((HasVirtualAuthenticator) $).removeVirtualAuthenticator(auth));
    }
  }
  