Add workarounds for Firefox in context click tests (#8547)

uitest-common/src/main/java/com/vaadin/tests/tb3/AbstractTB3Test.java

         }
     }
 
+    protected void contextClickElement(WebElement element) {
+        if (BrowserUtil.isFirefox(getDesiredCapabilities())) {
+            // Workaround for Selenium/TB and Firefox 45 issue
+            getCommandExecutor().executeScript(
+                    "var ev = document.createEvent('HTMLEvents'); ev.initEvent('contextmenu', true, false); arguments[0].dispatchEvent(ev);",
+                    element);
+        } else {
+            new Actions(getDriver()).contextClick(element).perform();
+        }
+    }
+
     protected boolean isLoadingIndicatorVisible() {
         WebElement loadingIndicator = findElement(
                 By.className("v-loading-indicator"));

uitest/src/test/java/com/vaadin/tests/components/checkbox/CheckboxContextClickTest.java

 import org.junit.Assert;
 import org.junit.Test;
 import org.openqa.selenium.WebElement;
-import org.openqa.selenium.interactions.Actions;
 import org.openqa.selenium.remote.DesiredCapabilities;
 
 import com.vaadin.testbench.By;
         WebElement input = checkbox.findElement(By.xpath("input"));
         WebElement label = checkbox.findElement(By.xpath("label"));
 
-        new Actions(getDriver()).contextClick(input).perform();
+        contextClickElement(input);
         Assert.assertEquals("1. checkbox context clicked", getLogRow(0));
         Assert.assertEquals("checked", checkbox.getValue());
 
-        new Actions(getDriver()).contextClick(label).perform();
+        contextClickElement(label);
         Assert.assertEquals("2. checkbox context clicked", getLogRow(0));
         Assert.assertEquals("checked", checkbox.getValue());
     }

uitest/src/test/java/com/vaadin/tests/contextclick/AbstractContextClickTest.java

 
 import com.vaadin.testbench.elements.AbstractComponentElement;
 import com.vaadin.testbench.elements.ButtonElement;
+import com.vaadin.testbench.parallel.BrowserUtil;
 import com.vaadin.testbench.parallel.TestCategory;
 import com.vaadin.tests.tb3.MultiBrowserTest;
 
      * @param e
      *            web element
      * @param xCoord
-     *            x coordinate
+     *            x coordinate relative to the top-left corner of the element
      * @param yCoord
-     *            y coordinate
+     *            y coordinate relative to the top-left corner of the element
      */
     protected void contextClick(WebElement e, int xCoord, int yCoord) {
-        new Actions(getDriver()).moveToElement(e, xCoord, yCoord).contextClick()
-                .moveByOffset(-5, -5).click().perform();
+        if (BrowserUtil.isFirefox(getDesiredCapabilities())) {
+            // Workaround for Selenium/TB and Firefox 45 issue
+            int x = e.getLocation().getX() + xCoord;
+            int y = e.getLocation().getY() + yCoord;
+            getCommandExecutor().executeScript(
+                    "var ev = document.createEvent('MouseEvents'); ev.initMouseEvent('contextmenu', true, true, document.defaultView, 1, arguments[1], arguments[2], arguments[1], arguments[2], false, false, false, false, 2, null); arguments[0].dispatchEvent(ev);",
+                    e, x, y);
+            // make sure browser context menu does not block the test
+            getCommandExecutor().executeScript(
+                    "var ev = document.createEvent('MouseEvents'); ev.initMouseEvent('click', true, true, document.defaultView, 1, arguments[1]-5, arguments[2]-5, arguments[1]-5, arguments[2]-5, false, false, false, false, 1, null); arguments[0].dispatchEvent(ev);",
+                    e, x, y);
+        } else {
+            new Actions(getDriver()).moveToElement(e, xCoord, yCoord)
+                    .contextClick().moveByOffset(-5, -5).click().perform();
+        }
     }
 
 }

uitest/src/test/java/com/vaadin/tests/contextclick/GridContextClickTest.java

 import org.junit.Test;
 import org.openqa.selenium.WebElement;
 
-import com.vaadin.testbench.elements.GridElement;
 import com.vaadin.testbench.elements.ButtonElement;
+import com.vaadin.testbench.elements.GridElement;
 
 public class GridContextClickTest extends AbstractContextClickTest {