NUnitWeb Code

/********************************************************************************************************************
'
' Copyright (c) 2002, Brian Knowles, Jim Shore
'
' Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
' documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
' the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
' to permit persons to whom the Software is furnished to do so, subject to the following conditions:
'
' The above copyright notice and this permission notice shall be included in all copies or substantial portions 
' of the Software.
'
' THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
' THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
' AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
' CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
' DEALINGS IN THE SOFTWARE.
'
'*******************************************************************************************************************/

using System;
using NUnit.Framework;
using NUnit.Extensions.Web.AspNet;

namespace NUnit.Extensions.Web.Test
{
	public class PerformanceTest : NUnitAspTestCase
	{
		private const int expectedTestsPerSecond = 1;
		private const long speedOfMinimumComputer = 67;		// determined empirically; do not change

		[Test]
		public void TestPerformance() 
		{
			TimeSpan runTime = BestOutOfThree();
			TimeSpan calibratedTime = AdjustForSpeedOfComputer(runTime);
			TimeSpan expectedTime = new TimeSpan(0, 0, 0, 0, 1000 / expectedTestsPerSecond);
			string failureMessage = String.Format("calibrated test time must be better than {0} h:m:s but was {1}", expectedTime, calibratedTime);
			Assert.IsTrue(calibratedTime <= expectedTime, failureMessage);
		}

		private TimeSpan AdjustForSpeedOfComputer(TimeSpan time)
		{
			long speed = CalculateComputerSpeedSuchThatLargerIsBetter();

			double speedRatio = speed / speedOfMinimumComputer;
			long adjustedTime = (long)(speedRatio * time.Ticks);
			return new TimeSpan(adjustedTime);
		}

		private long CalculateComputerSpeedSuchThatLargerIsBetter()
		{
			DateTime start = DateTime.Now;
			TimeSpan runTime = new TimeSpan(0, 0, 0, 0, 200);
			long speed = 0;
			Browser.SendRequest(BaseUrl + "PerformanceTestPage.aspx");
			string timeWaster = Browser.Document.BodyTag.InnerText;
			do
			{
				speed++;
				timeWaster = timeWaster.ToUpper();
				timeWaster = timeWaster.ToLower();
			} while ((DateTime.Now - start) < runTime);
			return speed;
		}

		private TimeSpan BestOutOfThree()
		{
			TimeSpan bestPerformance = TimeSpan.MaxValue;
			for (int i = 0; i < 3; i++) 
			{
				TimeSpan currentPerformance = TimedTest();
				if (currentPerformance < bestPerformance) 
					bestPerformance = currentPerformance;
			}
			return bestPerformance;
		}

		private TimeSpan TimedTest()
		{
			RunTest();
			return Browser.LoadTime;
		}

		private void RunTest()
		{
			TextBoxTester textBox1 = new TextBoxTester(Browser, "textBox1");
			TextBoxTester textBox2 = new TextBoxTester(Browser, "textBox2");
			TextBoxTester textBox3 = new TextBoxTester(Browser, "textBox3");
			TextBoxTester textBox4 = new TextBoxTester(Browser, "textBox4");
			TextBoxTester textBox5 = new TextBoxTester(Browser, "textBox5");
			ButtonTester button = new ButtonTester(Browser, "button");

			Browser.SendRequest(BaseUrl + "PerformanceTestPage.aspx");
			Assert.AreEqual("textBox1", textBox1.Text, "textBox1");
			Assert.AreEqual("textBox2", textBox2.Text, "textBox2");
			Assert.AreEqual("textBox3", textBox3.Text, "textBox3");
			Assert.AreEqual("textBox4", textBox4.Text, "textBox4");
			Assert.AreEqual("textBox5", textBox5.Text, "textBox5");

			textBox1.Text = "not 1";
			textBox2.Text = "not 2";
			textBox3.Text = "not 3";
			textBox4.Text = "not 4";
			textBox5.Text = "not 5";

			button.Click();
			Assert.AreEqual("not 1", textBox1.Text, "textBox1");
			Assert.AreEqual("not 2", textBox2.Text, "textBox2");
			Assert.AreEqual("not 3", textBox3.Text, "textBox3");
			Assert.AreEqual("not 4", textBox4.Text, "textBox4");
			Assert.AreEqual("not 5", textBox5.Text, "textBox5");
		}
	}
}