[dotnet] [test] Eliminate stub driver for testing events in Support package

dotnet/test/support/Events/EventFiringWebDriverTests.cs

@@ -219,19 +219,18 @@ public void ShouldUnwrapElementArgsWhenCallingScripts()
     public void ShouldBeAbleToWrapSubclassesOfSomethingImplementingTheWebDriverInterface()
     {
         // We should get this far
-        EventFiringWebDriver testDriver = new EventFiringWebDriver(new ChildDriver());
+        EventFiringWebDriver testDriver = new EventFiringWebDriver(mockDriver.Object);
     }
 
     [Test]
     public void ShouldBeAbleToAccessWrappedInstanceFromEventCalls()
     {
-        var stubDriver = new StubDriver();
-        EventFiringWebDriver testDriver = new EventFiringWebDriver(stubDriver);
-        StubDriver wrapped = ((IWrapsDriver)testDriver).WrappedDriver as StubDriver;
-        Assert.That(wrapped, Is.EqualTo(stubDriver));
+        EventFiringWebDriver testDriver = new EventFiringWebDriver(mockDriver.Object);
+        IWebDriver wrapped = ((IWrapsDriver)testDriver).WrappedDriver;
+        Assert.That(wrapped, Is.SameAs(mockDriver.Object));
         testDriver.Navigating += new EventHandler<WebDriverNavigationEventArgs>((sender, e) =>
         {
-            Assert.That(stubDriver, Is.EqualTo(e.Driver));
+            Assert.That(e.Driver, Is.SameAs(mockDriver.Object));
         });
 
         testDriver.Url = "http://example.org";
@@ -293,8 +292,4 @@ public void ShouldFireFindEventsInShadowRoot()
     public interface IExecutingDriver : IWebDriver, IJavaScriptExecutor
     {
     }
-
-    public class ChildDriver : StubDriver
-    {
-    }
 }