Correcting IWebElement.GetScreenshot remote URL

Author: jimevans

dotnet/src/webdriver/Remote/W3CWireProtocolCommandInfoRepository.cs

@@ -1,4 +1,4 @@
-// <copyright file="W3CWireProtocolCommandInfoRepository.cs" company="WebDriver Committers">
+// <copyright file="W3CWireProtocolCommandInfoRepository.cs" company="WebDriver Committers">
 // 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
@@ -108,7 +108,7 @@ protected override void InitializeCommandDictionary()
             this.TryAddCommand(DriverCommand.GetAlertText, new CommandInfo(CommandInfo.GetCommand, "/session/{sessionId}/alert/text"));
             this.TryAddCommand(DriverCommand.SetAlertValue, new CommandInfo(CommandInfo.PostCommand, "/session/{sessionId}/alert/text"));
             this.TryAddCommand(DriverCommand.Screenshot, new CommandInfo(CommandInfo.GetCommand, "/session/{sessionId}/screenshot"));
-            this.TryAddCommand(DriverCommand.ElementScreenshot, new CommandInfo(CommandInfo.GetCommand, "/session/{sessionId}/screenshot/{id}"));
+            this.TryAddCommand(DriverCommand.ElementScreenshot, new CommandInfo(CommandInfo.GetCommand, "/session/{sessionId}/element/{id}/screenshot"));
 
             // Commands below here are not included in the W3C specification,
             // but are required for full fidelity of execution with Selenium's

dotnet/test/common/TakesScreenshotTest.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using NUnit.Framework;
 
@@ -26,6 +26,26 @@ public void ShouldTakeScreenshotsOfThePage()
             File.Delete(filename);
         }
 
+        [Test]
+        public void ShouldTakeScreenshotsOfAnElement()
+        {
+            driver.Url = simpleTestPage;
+            IWebElement element = driver.FindElement(By.Id("multiline"));
+
+            ITakesScreenshot screenshotCapableElement = element as ITakesScreenshot;
+            if (screenshotCapableElement == null)
+            {
+                return;
+            }
+
+            string filename = Path.Combine(Path.GetTempPath(), "snapshot" + new Random().Next().ToString() + ".png");
+            Screenshot screenImage = screenshotCapableElement.GetScreenshot();
+            screenImage.SaveAsFile(filename, ScreenshotImageFormat.Png);
+            Assert.IsTrue(File.Exists(filename));
+            Assert.IsTrue(new FileInfo(filename).Length > 0);
+            File.Delete(filename);
+        }
+
         [Test]
         public void CaptureToBase64()
         {