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;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.openqa.selenium.support.ui.ExpectedConditions.presenceOfElementLocated;
  import static org.openqa.selenium.support.ui.ExpectedConditions.titleIs;
  import static org.openqa.selenium.testing.drivers.Browser.FIREFOX;
  import static org.openqa.selenium.testing.drivers.Browser.HTMLUNIT;
  import static org.openqa.selenium.testing.drivers.Browser.IE;
  import static org.openqa.selenium.testing.drivers.Browser.SAFARI;
  
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.testing.Ignore;
  import org.openqa.selenium.testing.JupiterTestBase;
  import org.openqa.selenium.testing.NotYetImplemented;
  import org.openqa.selenium.testing.SwitchToTopAfterTest;
  
  @Ignore(value = HTMLUNIT, reason = "Scrolling requires rendering")
  class ClickScrollingTest extends JupiterTestBase {
  
    @Test
    void testClickingOnAnchorScrollsPage() {
      String scrollScript = "";
      scrollScript += "var pageY;";
      scrollScript += "if (typeof(window.pageYOffset) == 'number') {";
      scrollScript += "  pageY = window.pageYOffset;";
      scrollScript += "} else {";
      scrollScript += "  pageY = document.documentElement.scrollTop;";
      scrollScript += "}";
      scrollScript += "return pageY;";
  
      driver.get(pages.macbethPage);
  
      driver.findElement(By.partialLinkText("last speech")).click();
  
      Object x = ((JavascriptExecutor) driver).executeScript(scrollScript);
      // Focusing on to click, but not actually following,
      // the link will scroll it in to view, which is a few pixels further than 0
      // According to documentation at
      // https://developer.mozilla.org/en-US/docs/Web/API/Window/pageYOffset
      // window.pageYOffset may not return integer value.
      // With the following changes in below we are checking the type of returned object and assigning
      // respectively
      // the value of 'yOffset'
      if (x instanceof Long) {
        long yOffset = (Long) x;
        assertThat(yOffset).describedAs("Did not scroll").isGreaterThan(300L);
      } else if (x instanceof Double) {
        double yOffset = (Double) x;
        assertThat(yOffset).describedAs("Did not scroll").isGreaterThan(300.0);
      }
    }
  
    @Test
    void testShouldScrollToClickOnAnElementHiddenByOverflow() {
      String url = appServer.whereIs("click_out_of_bounds_overflow.html");
      driver.get(url);
  
      WebElement link = driver.findElement(By.id("link"));
      link.click();
    }
  
    @Test
    void testShouldBeAbleToClickOnAnElementHiddenByOverflow() {
      driver.get(appServer.whereIs("scroll.html"));
  
      WebElement link = driver.findElement(By.id("line8"));
      // This used to throw a MoveTargetOutOfBoundsException - we don't expect it to
      link.click();
      assertThat(driver.findElement(By.id("clicked")).getText()).isEqualTo("line8");
    }
  
    @Test
    @Ignore(
        value = FIREFOX,
        reason = "horizontal scroll bar gets in the way",
        issue = "https://github.com/mozilla/geckodriver/issues/2013")
    public void testShouldBeAbleToClickOnAnElementHiddenByDoubleOverflow() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_double_overflow_auto.html"));
  
      driver.findElement(By.id("link")).click();
      wait.until(titleIs("Clicked Successfully!"));
    }
  
    @Test
    void testShouldBeAbleToClickOnAnElementHiddenByYOverflow() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_y_overflow_auto.html"));
  
      driver.findElement(By.id("link")).click();
      wait.until(titleIs("Clicked Successfully!"));
    }
  
    @Test
    @Ignore(value = IE, issue = "716")
    @Ignore(
        value = FIREFOX,
        reason = "horizontal scroll bar gets in the way",
        issue = "https://github.com/mozilla/geckodriver/issues/2013")
    public void testShouldBeAbleToClickOnAnElementPartiallyHiddenByOverflow() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_partially_hidden_element.html"));
  
      driver.findElement(By.id("btn")).click();
      wait.until(titleIs("Clicked Successfully!"));
    }
  
    @Test
    void testShouldNotScrollOverflowElementsWhichAreVisible() {
      driver.get(appServer.whereIs("scroll2.html"));
      WebElement list = driver.findElement(By.tagName("ul"));
      WebElement item = list.findElement(By.id("desired"));
      item.click();
      long yOffset =
          (Long) ((JavascriptExecutor) driver).executeScript("return arguments[0].scrollTop;", list);
      assertThat(yOffset).describedAs("Should not have scrolled").isZero();
    }
  
    @Test
    @Ignore(
        value = FIREFOX,
        reason = "horizontal scroll bar gets in the way",
        issue = "https://github.com/mozilla/geckodriver/issues/2013")
    @NotYetImplemented(IE)
    public void testShouldNotScrollIfAlreadyScrolledAndElementIsInView() {
      driver.get(appServer.whereIs("scroll3.html"));
      driver.findElement(By.id("button2")).click();
      long scrollTop = getScrollTop();
      driver.findElement(By.id("button1")).click();
      assertThat(getScrollTop()).isEqualTo(scrollTop);
    }
  
    @Test
    void testShouldBeAbleToClickRadioButtonScrolledIntoView() {
      driver.get(appServer.whereIs("scroll4.html"));
      driver.findElement(By.id("radio")).click();
      // If we don't throw, we're good
    }
  
    @Test
    @Ignore(value = IE, reason = "IE has special overflow handling")
    @NotYetImplemented(SAFARI)
    public void testShouldScrollOverflowElementsIfClickPointIsOutOfViewButElementIsInView() {
      driver.get(appServer.whereIs("scroll5.html"));
      driver.findElement(By.id("inner")).click();
      assertThat(driver.findElement(By.id("clicked")).getText()).isEqualTo("clicked");
    }
  
    @SwitchToTopAfterTest
    @Test
    @NotYetImplemented(SAFARI)
    @Ignore(
        value = FIREFOX,
        reason = "frame not scrolled into view",
        issue = "https://bugzilla.mozilla.org/show_bug.cgi?id=1314462")
    public void testShouldBeAbleToClickElementInAFrameThatIsOutOfView() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_frame_out_of_view.html"));
      driver.switchTo().frame("frame");
      WebElement element = driver.findElement(By.name("checkbox"));
      element.click();
      assertThat(element.isSelected()).isTrue();
    }
  
    @SwitchToTopAfterTest
    @Test
    void testShouldBeAbleToClickElementThatIsOutOfViewInAFrame() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_scrolling_frame.html"));
      driver.switchTo().frame("scrolling_frame");
      WebElement element = driver.findElement(By.name("scroll_checkbox"));
      element.click();
      assertThat(element.isSelected()).isTrue();
    }
  
    @SwitchToTopAfterTest
    @Test
    @NotYetImplemented(SAFARI)
    public void testShouldBeAbleToClickElementThatIsOutOfViewInAFrameThatIsOutOfView() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_scrolling_frame_out_of_view.html"));
      driver.switchTo().frame("scrolling_frame");
      WebElement element = driver.findElement(By.name("scroll_checkbox"));
      element.click();
      assertThat(element.isSelected()).isTrue();
    }
  
    @SwitchToTopAfterTest
    @Test
    @Ignore(
        value = FIREFOX,
        reason = "horizontal scroll bar gets in the way",
        issue = "https://github.com/mozilla/geckodriver/issues/2013")
    public void testShouldBeAbleToClickElementThatIsOutOfViewInANestedFrame() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_nested_scrolling_frames.html"));
      driver.switchTo().frame("scrolling_frame");
      driver.switchTo().frame("nested_scrolling_frame");
      WebElement element = driver.findElement(By.name("scroll_checkbox"));
      element.click();
      assertThat(element.isSelected()).isTrue();
    }
  
    @SwitchToTopAfterTest
    @Test
    @Ignore(
        value = FIREFOX,
        reason = "horizontal scroll bar gets in the way",
        issue = "https://github.com/mozilla/geckodriver/issues/2013")
    @NotYetImplemented(SAFARI)
    public void testShouldBeAbleToClickElementThatIsOutOfViewInANestedFrameThatIsOutOfView() {
      driver.get(
          appServer.whereIs("scrolling_tests/page_with_nested_scrolling_frames_out_of_view.html"));
      driver.switchTo().frame("scrolling_frame");
      driver.switchTo().frame("nested_scrolling_frame");
      WebElement element = driver.findElement(By.name("scroll_checkbox"));
      element.click();
  
      assertThat(element.isSelected()).isTrue();
    }
  
    @Test
    void testShouldNotScrollWhenGettingElementSize() {
      driver.get(appServer.whereIs("scroll3.html"));
      long scrollTop = getScrollTop();
      driver.findElement(By.id("button1")).getSize();
      assertThat(getScrollTop()).isEqualTo(scrollTop);
    }
  
    private long getScrollTop() {
      wait.until(presenceOfElementLocated(By.tagName("body")));
      return (Long) ((JavascriptExecutor) driver).executeScript("return document.body.scrollTop;");
    }
  
    @SwitchToTopAfterTest
    @Test
    @NotYetImplemented(SAFARI)
    @Ignore(
        value = FIREFOX,
        reason = "frame not scrolled into view",
        issue = "https://bugzilla.mozilla.org/show_bug.cgi?id=1314462")
    public void testShouldBeAbleToClickElementInATallFrame() {
      driver.get(appServer.whereIs("scrolling_tests/page_with_tall_frame.html"));
      driver.switchTo().frame("tall_frame");
      WebElement element = driver.findElement(By.name("checkbox"));
      element.click();
      assertThat(element.isSelected()).isTrue();
    }
  }
  