[java] add tests for Firefox HasExtensions functionality

java/test/org/openqa/selenium/firefox/BUILD.bazel

@@ -44,10 +44,12 @@ java_selenium_test_suite(
         "firefox",
     ],
     data = [
+        "//third_party/firebug:favourite_colour-1.1-an+fx.xpi",
         "//third_party/firebug:firebug-1.5.0-fx.xpi",
         "//third_party/firebug:mooltipass-1.1.87.xpi",
     ],
     resources = [
+        "//third_party/firebug:favourite_colour-1.1-an+fx.xpi",
         "//third_party/firebug:firebug-1.5.0-fx.xpi",
         "//third_party/firebug:mooltipass-1.1.87.xpi",
     ],

java/test/org/openqa/selenium/firefox/FirefoxDriverTest.java

@@ -30,12 +30,13 @@
 import org.openqa.selenium.ParallelTestRunner.Worker;
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.WebElement;
+import org.openqa.selenium.build.InProject;
+import org.openqa.selenium.remote.Augmenter;
 import org.openqa.selenium.remote.CapabilityType;
 import org.openqa.selenium.remote.Command;
 import org.openqa.selenium.remote.CommandExecutor;
 import org.openqa.selenium.remote.DriverCommand;
 import org.openqa.selenium.remote.RemoteWebDriver;
-import org.openqa.selenium.remote.RemoteWebDriverBuilder;
 import org.openqa.selenium.remote.SessionId;
 import org.openqa.selenium.remote.UnreachableBrowserException;
 import org.openqa.selenium.support.ui.ExpectedCondition;
@@ -51,6 +52,9 @@
 import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Field;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.file.Path;
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.List;
@@ -521,20 +525,42 @@ public void testFirefoxCanNativelyClickOverlappingElements() {
   }
 
   @Test
-  public void shouldAllowRemoteWebDriversToBeAugmentedWithHasExtensions() {
+  public void shouldAddExtensions() {
+    Path extension = InProject.locate("third_party/firebug/favourite_colour-1.1-an+fx.xpi");
+
+    ((FirefoxDriver) driver).installExtension(extension);
+    ((FirefoxDriver) driver).uninstallExtension("[email protected]");
+  }
+
+  @Test
+  public void shouldAllowRemoteWebDriverBuilderToUseHasExtensions() {
     WebDriver driver = RemoteWebDriver.builder()
       .oneOf(new FirefoxOptions())
       .address("http://localhost:4444/")
       .build();
 
     try {
-      assertThat(driver).isInstanceOf(HasExtensions.class);
-      fail(driver.getClass().getName());
+      Path extension = InProject.locate("third_party/firebug/favourite_colour-1.1-an+fx.xpi");
+      ((HasExtensions) driver).installExtension(extension);
+      ((HasExtensions) driver).uninstallExtension("[email protected]");
     } finally {
       driver.quit();
     }
   }
 
+  @Test
+  public void shouldAllowDriverToBeAugmentedWithHasExtensions() throws MalformedURLException {
+    WebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444/"), new FirefoxOptions());
+    WebDriver augmentedDriver = new Augmenter().augment(driver);
+
+    try {
+      Path extension = InProject.locate("third_party/firebug/favourite_colour-1.1-an+fx.xpi");
+      ((HasExtensions) augmentedDriver).installExtension(extension);
+      ((HasExtensions) augmentedDriver).uninstallExtension("[email protected]");
+    } finally {
+      driver.quit();
+    }
+  }
 
   private static class CustomFirefoxProfile extends FirefoxProfile {}
 

third_party/firebug/BUILD.bazel

@@ -2,6 +2,7 @@ licenses(["notice"])
 
 exports_files(
     [
+        "favourite_colour-1.1-an+fx.xpi",
         "firebug-1.5.0-fx.xpi",
         "mooltipass-1.1.87.xpi",
     ],