/Utilities/Assert.cs

  1using System;
  2using System.Collections;
  3using System.Collections.Generic;
  4using System.ComponentModel;
  5using System.Runtime.Serialization;
  6using Delta.Utilities.Helpers;
  7using NUnit.Framework;
  8
  9namespace Delta.Utilities
 10{
 11	/// <summary>
 12	/// Assert helper class for testing and debugging. Provides static methods
 13	/// that help you figuring out if values are equal, not equal, less, greater,
 14	/// true, false, etc. This way xUnit, NUnit, etc. is not required and we can
 15	/// make sure all unit tests can be executed on all supported platforms.
 16	/// </summary>
 17	[EditorBrowsable(EditorBrowsableState.Never)]
 18	public static class Assert
 19	{
 20		#region AssertException Class
 21		/// <summary>
 22		/// Assert exception, this is just a very simple exception. Can be derived
 23		/// and used for other exceptions too (sometimes used for testing too).
 24		/// </summary>
 25		[Serializable]
 26		public sealed class AssertException : Exception
 27		{
 28			#region LineNumber (Public)
 29			/// <summary>
 30			/// The number of the code line where this exception has happened.
 31			/// </summary>
 32			public string LineNumber
 33			{
 34				get;
 35				private set;
 36			}
 37			#endregion
 38
 39			#region Constructors
 40			/// <summary>
 41			/// Create assert exception with just an assert message.
 42			/// We use mostly just this constructor to display the message string.
 43			/// </summary>
 44			/// <param name="setMessage">Message describing the problem</param>
 45			public AssertException(string setMessage)
 46				: base(setMessage)
 47			{
 48			}
 49
 50			/// <summary>
 51			/// Create assert exception with both an assert message and an inner
 52			/// exception. Usually used when something very bad happened and we even
 53			/// need to display the inner exception.
 54			/// </summary>
 55			/// <param name="setMessage">Message describing the problem</param>
 56			/// <param name="setInnerException">Inner exception</param>
 57			public AssertException(string setMessage, Exception setInnerException)
 58				: base(setMessage, setInnerException)
 59			{
 60			}
 61
 62			/// <summary>
 63			/// Initializes a new instance of the System.Exception class with
 64			/// serialized data. This is required e.g. for serializing an exception
 65			/// from another worker domain.
 66			/// </summary>
 67			/// <remarks>
 68			/// This constructor will be called after the public constructor.
 69			/// </remarks>
 70			/// <param name="info">
 71			/// Serialization info to pass to the base Exception.
 72			/// </param>
 73			/// <param name="context">Context for the base Exception</param>
 74			private AssertException(SerializationInfo info,
 75				StreamingContext context)
 76				: base(info, context)
 77			{
 78				// To reconstruct the info about our "ExceptionLine" we are only
 79				// interested in the last line of the stack trace (which was build now
 80				// by the base class) because this contains the info at which code line
 81				// this exception was thrown, so grab now the name of the method name
 82				// of the code first
 83				int splitIndex = StackTrace.LastIndexOf("at ");
 84				string lastExceptionLine = (splitIndex != MathHelper.InvalidIndex)
 85				                           	? StackTrace.Substring(splitIndex + "at ".Length)
 86				                           	: StackTrace;
 87
 88				// but still keep the information about the code line number which is
 89				// important to identify which Assert it was exactly
 90				splitIndex = lastExceptionLine.LastIndexOf(' ');
 91				if (splitIndex != MathHelper.InvalidIndex)
 92				{
 93					LineNumber = lastExceptionLine.Substring(splitIndex + 1);
 94				}
 95			}
 96			#endregion
 97		}
 98		#endregion
 99
100		#region Delegates
101		/// <summary>
102		/// Helper delegate for the Throws method below to test if code throws
103		/// a specific exception. Same delegate as Base.RunDelegate, but we have
104		/// no access to that one here.
105		/// </summary>
106		[EditorBrowsable(EditorBrowsableState.Never)]
107		public delegate void ThrowsDelegate();
108		#endregion
109
110		#region Equals (Static)
111		/// <summary>
112		/// Equals, just trying to hide it. The Equals() method is not officially
113		/// supported for 'Assert', please use the 'Equal()' method instead.
114		/// </summary>
115		[EditorBrowsable(EditorBrowsableState.Never)]
116		public new static bool Equals(object objA, object objB)
117		{
118			return object.Equals(objA, objB);
119		}
120		#endregion
121
122		#region ReferenceEquals (Static)
123		/// <summary>
124		/// Hide method. The 'ReferenceEquals()' method is not officially
125		/// supported for 'Assert', please use the 'Equal()' method instead.
126		/// </summary>
127		[EditorBrowsable(EditorBrowsableState.Never)]
128		public new static bool ReferenceEquals(object objA, object objB)
129		{
130			return object.ReferenceEquals(objA, objB);
131		}
132		#endregion
133
134		#region Equal (Static)
135		/// <summary>
136		/// Are two values equal? All they need is some comparer (see IsEqual).
137		/// Throws an AssertException if the values are not equal. Note: Other
138		/// unit test frameworks use expected and actual values for the parameters
139		/// here, but we don't care about the order, usually it is programmed in
140		/// a natural way so you just say Assert.Equal(Numbers.Add(10, 7), 17),
141		/// but you can also do it the xUnit/NUnit way: Assert.Equal(17,
142		/// Numbers.Add(10, 7).
143		/// </summary>
144		/// <typeparam name="T">Type to compare</typeparam>
145		/// <param name="firstValue">First value</param>
146		/// <param name="secondValue">Second value</param>
147		/// <exception cref="AssertException">Exception is thrown if two values 
148		/// are not equal</exception>
149		public static void Equal<T>(T firstValue, T secondValue)
150		{
151			if (IsEqual(firstValue, secondValue) == false)
152			{
153				throw new AssertException(
154					"The two values were not equal: '" + firstValue + "' was not " +
155					"equal to '" + secondValue + "'.");
156			}
157		}
158		#endregion
159
160		#region NotEqual (Static)
161		/// <summary>
162		/// These values should not be equal, if they are an exception is thrown.
163		/// </summary>
164		/// <param name="firstValue">Expected value</param>
165		/// <param name="secondValue">Actual value</param>
166		public static void NotEqual<T>(T firstValue, T secondValue)
167		{
168			if (IsEqual(firstValue, secondValue))
169			{
170				throw new AssertException(
171					"The two values were equal, but they should be different: '" +
172					firstValue + "' was equal to '" + secondValue + "'!");
173			}
174		}
175		#endregion
176
177		#region NearlyEqual (Static)
178		/// <summary>
179		/// Nearly equal check, pretty much the same as the Equal check above,
180		/// but it only allows floats and it will still return true if
181		/// expectedValue and actualValue are less than given max. difference.
182		/// </summary>
183		/// <param name="firstValue">First parameter to compare</param>
184		/// <param name="secondValue">Second parameter to compare</param>
185		/// <param name="maxDifference">
186		/// Maximum difference allowed, MathHelper.Epsilon by default.
187		/// </param>
188		public static void NearlyEqual(float firstValue, float secondValue,
189			float maxDifference = MathHelper.Epsilon)
190		{
191			float difference = Math.Abs(secondValue - firstValue);
192			if (difference > maxDifference)
193			{
194				throw new AssertException(
195					"The two values were not nearly equal: '" + firstValue + "' and '" +
196					secondValue + "' (max. difference is '" + maxDifference + "')");
197			}
198		}
199		#endregion
200
201		#region Between (Static)
202		/// <summary>
203		/// Checks if valueToCheck is in between lowerLimit and upperLimit,
204		/// lowerLimit must be smaller than upperLimit!
205		/// </summary>
206		/// <param name="valueToCheck">Value we want to check that should be
207		/// between lowerLimit and upperLimit (both exclusive)</param>
208		/// <param name="lowerLimit">Lower limit value</param>
209		/// <param name="upperLimit">Upper limit value</param>
210		public static void Between(float valueToCheck, float lowerLimit,
211			float upperLimit)
212		{
213			if (lowerLimit > upperLimit)
214			{
215				throw new ArgumentException(
216					"Why is lowerLimit '" + lowerLimit + "' bigger than upperLimit '" +
217					upperLimit + "'? Please make sure lowerLimit is a smaller value " +
218					"than upperLimit.");
219			}
220			if (valueToCheck < lowerLimit ||
221			    valueToCheck > upperLimit)
222			{
223				throw new AssertException(
224					"The value '" + valueToCheck + "' is not in between '" + lowerLimit +
225					"' and '" + upperLimit + "'.");
226			}
227		}
228		#endregion
229
230		#region Contains (Static)
231		/// <summary>
232		/// Simple string contains check that allows strings to be case-insensitive.
233		/// Will throw an AssertException if expectedInString is not found in
234		/// fullString. Note: Currently only supports strings, but this way
235		/// we save one intellisense space (else we have 2 Contains methods).
236		/// </summary>
237		/// <typeparam name="T">Type to compare</typeparam>
238		/// <param name="expectedInString">String value we search for</param>
239		/// <param name="fullString">The string where expectedInString should be
240		/// contained somewhere</param>
241		public static void Contains<T>(T fullString, T expectedInString)
242		{
243			string expectedInStringValue = expectedInString as string;
244			string fullStringValue = fullString as string;
245
246			if (expectedInStringValue == null ||
247			    fullStringValue == null)
248			{
249				throw new ArithmeticException(
250					"You are only allowed to call this method with 2 strings");
251			}
252
253				// Note: We don't have the StringHelper here, so we need to do this
254				// by hand.
255			else if (fullStringValue.ToLower().Contains(
256				expectedInStringValue.ToLower()) == false)
257			{
258				throw new AssertException(
259					"The string '" + expectedInString + "' was expected to be found " +
260					"in '" + fullString + "', but it is just not in there.");
261			}
262		}
263
264		/// <summary>
265		/// Contains check for any IEnumerable (array, list, etc.). Will fail
266		/// with an AssertException if the expectedValue is not in someArray.
267		/// </summary>
268		/// <typeparam name="T">Type to compare</typeparam>
269		/// <param name="someArray">Some Array</param>
270		/// <param name="expectedValue">Expected Value</param>
271		public static void Contains<T>(IEnumerable<T> someArray, T expectedValue)
272		{
273			if (someArray == null)
274			{
275				throw new NullReferenceException(
276					"Provided array is null!\n" +
277					"Array needs to be initialized for checking 'Contains'.");
278			}
279
280			foreach (T arrayValue in someArray)
281			{
282				if (arrayValue.Equals(expectedValue))
283				{
284					return;
285				}
286			}
287
288			throw new AssertException(
289				"The value '" + expectedValue + "' was expected to be found in the " +
290				"array '" + someArray + "', but it is just not in there.");
291		}
292		#endregion
293
294		#region Throws (Static)
295		/// <summary>
296		/// Expects the testCode to throw an exception of exceptionType and catches
297		/// it (no exception is thrown to the caller), if it does not throw the
298		/// specified exceptionType, an AssertException is thrown.
299		/// </summary>
300		/// <param name="exceptionType">Exception Type</param>
301		/// <param name="testCode">Test Code</param>
302		/// <exception cref="AssertException">
303		/// This is thrown if the code does not throw the expected exception.
304		/// </exception>
305		public static void Throws(Type exceptionType, ThrowsDelegate testCode)
306		{
307			try
308			{
309				testCode();
310				throw new AssertException(
311					"Expected an '" + exceptionType + "', but the code succeeded.");
312			}
313			catch (Exception ex)
314			{
315				if (exceptionType.Equals(ex.GetType()) == false &&
316				    // Also allow derived exception types
317				    exceptionType.IsInstanceOfType(ex) == false)
318				{
319					throw new AssertException(
320						"Expected an '" + exceptionType + "', but got an '" +
321						ex.GetType() + "'", ex);
322				}
323			}
324			// Else everything is fine!
325		}
326		#endregion
327
328		#region True (Static)
329		/// <summary>
330		/// Simple check if a condition is true. Since we do not know why this
331		/// failed (if it is not true), you can optionally supply a why string!
332		/// </summary>
333		/// <param name="expectedTrueValue">
334		/// Expected value that should be true
335		/// </param>
336		/// <exception cref="AssertException">
337		/// If the value was not 'true' as expected!
338		/// </exception>
339		public static void True(bool expectedTrueValue)
340		{
341			if (expectedTrueValue != true)
342			{
343				throw new AssertException("The value was not 'true' as expected");
344			}
345		}
346
347		/// <summary>
348		/// Simple check if a condition is true. Since we do not know why this
349		/// failed (if it is not true), you can optionally supply a why string!
350		/// </summary>
351		/// <param name="expectedTrueValue">
352		/// Expected value that should be true.
353		/// </param>
354		/// <param name="why">
355		/// Extra string to explain why this is wrong
356		/// </param>
357		/// <exception cref="AssertException">
358		/// If the value was not 'true' as expected!
359		/// </exception>
360		public static void True(bool expectedTrueValue, string why)
361		{
362			if (expectedTrueValue != true)
363			{
364				throw new AssertException(
365					"The value was not 'true' as expected" +
366					(why != null
367					 	? ": " + why
368					 	: ""));
369			}
370		}
371		#endregion
372
373		#region False (Static)
374		/// <summary>
375		/// Simple check if a condition is false. Since we do not know why this
376		/// failed (if it is not false), you can optionally supply a why string!
377		/// </summary>
378		/// <param name="expectedFalseValue">
379		/// Expected value that should be false.
380		/// </param>
381		/// <exception cref="AssertException">
382		/// If the value was not 'false' as expected!
383		/// </exception>
384		public static void False(bool expectedFalseValue)
385		{
386			if (expectedFalseValue)
387			{
388				throw new AssertException("The value was not 'false' as expected");
389			}
390		}
391
392		/// <summary>
393		/// Simple check if a condition is false. Since we do not know why this
394		/// failed (if it is not false), you can optionally supply a why string!
395		/// </summary>
396		/// <param name="expectedFalseValue">
397		/// Expected value that should be false.
398		/// </param>
399		/// <param name="why">
400		/// Why did this happen? Optional extra information text that will be added
401		///  when the expectedFalseValue is not false.
402		/// </param>
403		/// <exception cref="AssertException">
404		/// If the value was not 'false' as expected!
405		/// </exception>
406		public static void False(bool expectedFalseValue, string why)
407		{
408			if (expectedFalseValue)
409			{
410				throw new AssertException(
411					"The value was not 'false' as expected" +
412					(why != null
413					 	? ": " + why
414					 	: ""));
415			}
416		}
417		#endregion
418
419		#region Null (Static)
420		/// <summary>
421		/// Simple check if a value is null.
422		/// </summary>
423		/// <param name="expectedNullValue">
424		/// Expected value that should be null.
425		/// </param>
426		/// <exception cref="AssertException">
427		/// If the value was not 'null' as expected!
428		/// </exception>
429		public static void Null(object expectedNullValue)
430		{
431			if (expectedNullValue != null)
432			{
433				throw new AssertException(
434					"The value was expected to be 'null': " + expectedNullValue);
435			}
436		}
437		#endregion
438
439		#region NotNull (Static)
440		/// <summary>
441		/// Simple check if a condition is false. Since we do not know why this
442		/// failed (if it is not false), you must supply a why string!
443		/// </summary>
444		/// <param name="expectedValue">
445		/// Expected value that should not be null
446		/// </param>
447		/// <exception cref="AssertException">
448		/// If the value was 'null', but we expected a not 'null' value!
449		/// </exception>
450		public static void NotNull(object expectedValue)
451		{
452			if (expectedValue == null)
453			{
454				throw new AssertException(
455					"The value was expected not to be 'null'!");
456			}
457		}
458		#endregion
459
460		#region Methods (Private)
461
462		#region IsEqual
463		/// <summary>
464		/// Helper method to figure out if two values are equal.
465		/// Value types can easily be compared via Equals, reference types have to
466		/// be from the same type and then we try to compare them IComparable, then
467		/// IEquatable and finally checking if enumerating works. If all fails we
468		/// still can fallback to the Equals method (same as for value types), but
469		/// this usually fails if two references are not exactly the same pointer.
470		/// </summary>
471		/// <exception cref="AssertException">
472		/// Exception if the two types are not equal (can be different types,
473		///  different values, different lists lengths, etc.)
474		/// </exception>
475		private static bool IsEqual<T>(T A, T B)
476		{
477			// Value types can easily be compared via Equals
478			Type objectType = typeof(T);
479			// Class types need some extra checking
480			if (objectType.IsValueType == false)
481			{
482				// Is normally "null" for classes
483				Object defaultValue = default(T);
484				// If is A == null ?
485				if (Object.Equals(A, defaultValue))
486				{
487					// and B == null ?
488					if (Object.Equals(B, defaultValue))
489					{
490						// the A and B are equal (-> null)
491						return true;
492					}
493
494					// -> A == null and B != null
495					return false;
496				}
497
498				if (Object.Equals(B, defaultValue))
499				{
500					// -> B == null and A != null
501					return false;
502				}
503			}
504
505			// At first we have to check the IComparable implementation (if exists)
506			// -> generic
507			IComparable<T> genericComparer = A as IComparable<T>;
508			if (genericComparer != null)
509			{
510				return genericComparer.CompareTo(B) == 0;
511			}
512			// -> non-generic
513			IComparable comparer = A as IComparable;
514			if (comparer != null)
515			{
516				return comparer.CompareTo(B) == 0;
517			}
518
519			// At second the if is a IEquatable interface implemented for checking the
520			// equality
521			IEquatable<T> equatable = A as IEquatable<T>;
522			if (equatable != null)
523			{
524				return equatable.Equals(B);
525			}
526
527			// In the case we have two lists, let's check the elements in there for
528			// equality
529			IEnumerable aEnumerable = A as IEnumerable;
530			IEnumerable bEnumerable = B as IEnumerable;
531			if (aEnumerable != null &&
532			    bEnumerable != null)
533			{
534				IEnumerator aEnumerator = A as IEnumerator;
535				IEnumerator bEnumerator = B as IEnumerator;
536				// Also check if we got an IList here
537				if (aEnumerator == null ||
538				    bEnumerator == null)
539				{
540					ICollection aCollection = A as ICollection;
541					ICollection bCollection = B as ICollection;
542
543					if (aCollection == null ||
544					    bCollection == null)
545					{
546						return A.Equals(B);
547					} // if
548
549					if (aCollection.Count !=
550					    bCollection.Count)
551					{
552						throw new AssertException(
553							"The element count of the two lists were not equal: '" +
554							aCollection.Count + "' was not equal to '" + bCollection.Count +
555							"'.");
556					} // else if
557
558					aEnumerator = aCollection.GetEnumerator();
559					bEnumerator = bCollection.GetEnumerator();
560				}
561
562				int elementIndex = -1;
563				do
564				{
565					elementIndex++;
566					bool hadANext = aEnumerator.MoveNext();
567					bool hadBNext = bEnumerator.MoveNext();
568
569					// End reached?
570					if (hadANext == false ||
571					    hadBNext == false)
572					{
573						// if one list is longer than the other one, they can't be equal
574						return hadANext == hadBNext;
575					}
576				} while (Object.Equals(aEnumerator.Current, bEnumerator.Current));
577
578				// The objects in the list are different
579				throw new AssertException(
580					"The element of the two lists at index '" + elementIndex +
581					"' was not equal: '" + aEnumerator.Current + "' is not equal to '" +
582					bEnumerator.Current + "'.");
583			}
584
585			// If the type of the value types doesn't match, we can't compare it
586			// because "StructA" can be totally different to "StructB" then it's
587			// not allowed to derive value types
588			if (A.GetType() !=
589			    B.GetType())
590			{
591				return false;
592			}
593
594			// If there is really no "compare interface", then let's just check by
595			// the default (object) comparer
596			return A.Equals(B);
597		}
598		#endregion
599
600		#endregion
601
602		/// <summary>
603		/// Tests, which can be tested with Delta.Tools.TestRunner.
604		/// </summary>
605		internal class AssertTests
606		{
607			#region Contains (LongRunning)
608			/// <summary>
609			/// Contains. Note: Too slow for a dynamic unit test.
610			/// </summary>
611			[Test, NUnit.Framework.Category("LongRunning")]
612			public void Contains()
613			{
614				// Is some string in another one?
615				Assert.Contains("Chin contain the word hi", "hi");
616
617				// And test if it can fail too
618				Assert.Throws(typeof(AssertException), delegate
619				{
620					Assert.Contains("a", "b");
621				});
622				// Try with switched parameters, should fail too!
623				Assert.Throws(typeof(AssertException), delegate
624				{
625					Assert.Contains("hi", "Chin contain the word hi");
626				});
627
628				// Next test the collection method
629				Assert.Contains(new[]
630				{
631					1, 2, 3
632				}, 1);
633				Assert.Contains(new[]
634				{
635					"a", "b", "c"
636				}, "b");
637				List<int> someList = new List<int>();
638				someList.Add(359);
639				someList.Add(984);
640				Assert.Contains(someList, 984);
641
642				// And finally some fail checks
643				Assert.Throws(typeof(AssertException), delegate
644				{
645					Assert.Contains(someList, 123);
646				});
647
648				// This fails too because "hi" is not equal to "hi there"
649				Assert.Throws(typeof(AssertException), delegate
650				{
651					Assert.Contains(new[]
652					{
653						"hi there", "whattup"
654					}, "hi");
655				});
656			}
657			#endregion
658
659			#region Throws (LongRunning)
660			/// <summary>
661			/// Throws. Note: Too slow for a dynamic unit test.
662			/// </summary>
663			[Test]
664			[NUnit.Framework.Category("LongRunning")]
665			public void Throws()
666			{
667				// Testing to throw some expected exceptions
668				Assert.Throws(typeof(NullReferenceException), delegate
669				{
670					throw new NullReferenceException("Shit happens");
671				});
672				Assert.Throws(typeof(NullReferenceException), delegate
673				{
674					object nullObject = null;
675					// Crashes here
676					nullObject.ToString();
677				});
678				Assert.Throws(typeof(AssertException), delegate
679				{
680					// This throws AssertException because 1 is not equal to 2
681					Assert.Equal(1, 2);
682				});
683
684				// We can also cascade Assert.Throws to check the opposite
685				Assert.Throws(typeof(AssertException), delegate
686				{
687					Assert.Throws(typeof(Exception), delegate
688					{
689						// The following code does NOT throw an exception and will
690						// therefore fail the Assert.Throws, which throws the
691						// AssertException caught above.
692						string abc = "abc";
693						abc += "def";
694					});
695				});
696
697				// Throwing the wrong exception will also fail
698				Assert.Throws(typeof(AssertException), delegate
699				{
700					Assert.Throws(typeof(InvalidOperationException), delegate
701					{
702						throw new NullReferenceException("Again?");
703					});
704				});
705
706				// However, throwing something from a derived exception should work
707				Assert.Throws(typeof(Exception), delegate
708				{
709					throw new NullReferenceException("Seems we like this one ..");
710				});
711			}
712			#endregion
713
714			#region NearlyEqual (LongRunning)
715			/// <summary>
716			/// Nearly equal
717			/// </summary>
718			[Test]
719			[NUnit.Framework.Category("LongRunning")]
720			public void NearlyEqual()
721			{
722				// Just checking some equal values
723				Assert.NearlyEqual(1, 1);
724				Assert.NearlyEqual(1.25f, 1.25f);
725				// Next check some different values, that are nearly equal
726				Assert.NearlyEqual(1.00002f, 1.00001f);
727				Assert.NearlyEqual((float)Math.Asin(Math.Sin(0.5f)), 0.5f);
728
729				// We expect an exception if the different values are not equal
730				Assert.Throws(typeof(AssertException), delegate
731				{
732					// This difference is just too big!
733					Assert.NearlyEqual(1.2f, 1.1f);
734				});
735			}
736			#endregion
737
738			#region Between
739			/// <summary>
740			/// Between
741			/// </summary>
742			[Test]
743			public void Between()
744			{
745				// 1 is between 0 and 2
746				Assert.Between(1, 0, 2);
747				// 54.43 is between 50 and 60
748				Assert.Between(54.43f, 50, 60);
749				// Also check if it can fail
750				Assert.Throws(typeof(AssertException), delegate
751				{
752					Assert.Between(44.43f, 50, 60);
753				});
754			}
755			#endregion
756
757			#region Equal
758			/// <summary>
759			/// Is equal
760			/// </summary>
761			[Test]
762			public void Equal()
763			{
764				// Just checking some doubles
765				Assert.Equal(3.0, 3.0);
766				// "null" references
767				Assert.Equal(null, (Object)null);
768				// and strings for equality
769				Assert.Equal("Test", "Test");
770
771				// We expect an exception if the different values are not equal
772				Assert.Throws(typeof(AssertException), delegate
773				{
774					Assert.Equal(3.0, 1.0);
775				});
776
777				Assert.Equal(new float[]
778				{
779					2, 3, 4, 5
780				},
781					new float[]
782					{
783						2, 3, 4, 5
784					});
785			}
786			#endregion
787
788			#region False
789			/// <summary>
790			/// False
791			/// </summary>
792			[Test]
793			public void False()
794			{
795				Assert.False(false, "False is always false");
796				Assert.False(1 == 2, "Self build non-equal check");
797				// And try to fail too
798				Assert.Throws(typeof(AssertException), delegate
799				{
800					Assert.False(2 == 2, "Self build non-equal check failing");
801				});
802			}
803			#endregion
804
805			#region NotEqual
806			/// <summary>
807			/// Not equal
808			/// </summary>
809			[Test]
810			public void NotEqual()
811			{
812				// Just checking some ints
813				Assert.NotEqual(1, 3);
814				// reference types
815				Assert.NotEqual(new Object(), null);
816				// and strings for non-equality
817				Assert.NotEqual("TEst", "Test");
818
819				// We expect an exception if equal values will check for non-equality
820				Assert.Throws(typeof(AssertException), delegate
821				{
822					Assert.NotEqual("Test", "Test");
823				});
824			}
825			#endregion
826
827			#region NotNull
828			/// <summary>
829			/// NotNull
830			/// </summary>
831			[Test]
832			public void NotNull()
833			{
834				Assert.NotNull("Hi");
835				const string someObject = "nag nag";
836				Assert.NotNull(someObject);
837				// And try to fail too
838				Assert.Throws(typeof(AssertException), delegate
839				{
840					Assert.NotNull(null);
841				});
842			}
843			#endregion
844
845			#region Null
846			/// <summary>
847			/// Null
848			/// </summary>
849			[Test]
850			public void Null()
851			{
852				// For same strange reason null is really null
853				Assert.Null(null);
854				// Objects can be null too
855				string someObject = null;
856				Assert.Null(someObject);
857				// And try to fail too
858				Assert.Throws(typeof(AssertException), delegate
859				{
860					Assert.Null("Hi");
861				});
862			}
863			#endregion
864
865			#region True
866			/// <summary>
867			/// True
868			/// </summary>
869			[Test]
870			public void True()
871			{
872				Assert.True(true, "True is always true");
873				Assert.True(1 == 1, "Self build equal check");
874				// And try to fail too
875				Assert.Throws(typeof(AssertException), delegate
876				{
877					Assert.True(1 == 2, "Self build equal check failing");
878				});
879			}
880			#endregion
881		}
882	}
883}
884