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Advanced Unit Testing, Part IV - Fixture Setup/Teardown, Test Repetition And Performance Tests

, 8 Oct 2003
This article extends the unit testing framework, adding fixture setup/teardown capability and performance (time and memory) measurement/testing.
UTWinForm
App.ico
bin
Debug
Fail.ico
Ignore.ico
ka.ico
Lib.dll
Lib.pdb
NotRun.ico
Pass.ico
UnitTest.dll
Untested.ico
UTCore.dll
UTExample.dll
UTWinForm.exe
obj
Debug
temp
TempPE
UTWinForm.exe
UTWinForm.Form1.resources
UTWinForm.pdb
UTWinForm.projdata
UTWinForm.csproj.user
Lib
bin
Debug
Lib.dll
KALib.csproj.user
obj
Debug
KALib.projdata
Lib.dll
Lib.pdb
Lib.projdata
temp
TempPE
UnitTest
bin
Debug
UnitTest.dll
obj
Debug
temp
TempPE
UnitTest.dll
UnitTest.pdb
UnitTest.projdata
UnitTest.csproj.user
UTCore
bin
Debug
Lib.dll
UnitTest.dll
UTCore.dll
obj
Debug
temp
TempPE
UTCore.dll
UTCore.pdb
UTCore.projdata
UTCore.csproj.user
UTExample
bin
Debug
UnitTest.dll
UTExample.dll
obj
Debug
temp
TempPE
UTExample.dll
UTExample.pdb
UTExample.projdata
Stubs
UTExample.csproj.user
using System;
using System.Collections;
using System.Reflection;
using System.Threading;

using KALib;

namespace UTCore
{
	public class MethodItem
	{
		private Assembly assembly;
		private string namespaceName;
		private string className;
		private string methodName;
		private object[] attributes;
		private MethodInfo methodInfo;
		private delegate void UnitTestDelegate();

		// test options
		private bool ignore;
		private string ignoreReason;
		private UnitTest.ExpectedExceptionAttribute eea;
		private int sequence;
		private int minOPS;
		private int repeatCount;
		private int repeatDelay;
		private int maxK;
		private int currentRep;
		private ArrayList requires;
		private Hashtable processExceptions;

		private long startTime;
		private long stopTime;
		private long executionTime;

		private int startMem;
		private int endMem;

		public object[] Attributes
		{
			get {return attributes;}
		}

		public bool Ignore
		{
			get {return ignore;}
			set {ignore=value;}
		}

		public string IgnoreReason
		{
			get {return ignoreReason;}
			set {ignoreReason=value;}
		}

		public UnitTest.ExpectedExceptionAttribute ExpectedException
		{
			get {return eea;}
			set {eea=value;}
		}

		public Hashtable ReverseProcessExpectedException
		{
			get {return processExceptions;}
		}

		public int Sequence
		{
			get {return sequence;}
			set {sequence=value;}
		}

		public ArrayList Requirements
		{
			get {return requires;}
		}

		public override string ToString()
		{
			return methodName;
		}

		public long ExecutionTime
		{
			get {return executionTime;}
		}

		public int MinOPS
		{
			get {return minOPS;}
			set {minOPS=value;}
		}

		public int RepeatCount
		{
			set {repeatCount=value;}
			get {return repeatCount;}
		}

		public int RepeatDelay
		{
			set {repeatDelay=value;}
			get {return repeatDelay;}
		}

		public int CurrentRep
		{
			set {currentRep=value;}
			get {return currentRep;}
		}

		public int MemoryUsed
		{
			get {return endMem-startMem;}
		}

		public int MaxK
		{
			get {return maxK;}
			set {maxK=value;}
		}

		public MethodItem(Assembly assembly, string namespaceName, string className, string methodName, MethodInfo methodInfo)
		{
			this.assembly=assembly;
			this.namespaceName=namespaceName;
			this.className=className;
			this.methodName=methodName;
			this.methodInfo=methodInfo;
			attributes=methodInfo.GetCustomAttributes(true);
			sequence=0;
			requires=new ArrayList();
			processExceptions=new Hashtable();
			maxK=-1;
			minOPS=-1;
			repeatCount=1;
			repeatDelay=-1;
			eea=null;
			ignore=false;
			ignoreReason="";
			startMem=0;
			endMem=0;
		}

		public void AddRequires(string methodName)
		{
			requires.Add(methodName);
		}

		public void Invoke(object classInstance)
		{
			// Delegates requires that methods have a specific signature and are public.
			// Delegates are faster than "methodInfo.Invoke".

			Type utdType=typeof(UnitTestDelegate);
			UnitTestDelegate utd=Delegate.CreateDelegate(utdType, classInstance, methodName) as UnitTestDelegate;

//			startMem=GC.GetTotalMemory(false);
			startMem=ProcessMemory.WorkingSet;
			startTime=HiResTimer.Ticks;
			try
			{
				utd();
			}
			catch(Exception e)
			{
				throw(e);
			}
			finally
			{
				// execution time cannot be zero.  If it is, set to a minimum of 1 tick
				// this prevents problems with calculating operations per second, which would
				// otherwise result in a divide by zero error.
				stopTime=HiResTimer.Ticks;
//				endMem=GC.GetTotalMemory(false);
				endMem=ProcessMemory.WorkingSet;
				executionTime=(stopTime==startTime ? 1 : stopTime-startTime);
			}

// The invoke function allows us to call functions with different parameter lists, and ones that are not public.
// However, this changes how we handle exceptions

//			try
//			{
//				methodInfo.Invoke(classInstance, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.InvokeMethod | BindingFlags.Static, null, null, null);
//			}
//			catch(Exception e)
//			{
//				throw(e.InnerException);
//			}
		}
	}
}

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About the Author

Marc Clifton
United States United States
Marc is the creator of two open source projects, MyXaml, a declarative (XML) instantiation engine and the Advanced Unit Testing framework, and Interacx, a commercial n-tier RAD application suite.  Visit his website, www.marcclifton.com, where you will find many of his articles and his blog.

Marc lives in Philmont, NY.

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