/// <summary>
/// Flag the constraint to use the supplied predicate function
/// </summary>
/// <param name="comparison">The comparison function to use.</param>
/// <returns>Self.</returns>
public DictionaryContainsValueConstraint Using <TCollectionType, TMemberType>(Func <TCollectionType, TMemberType, bool> comparison)
{
// reverse the order of the arguments to match expectations of PredicateEqualityComparer
Func <TMemberType, TCollectionType, bool> invertedComparison = (actual, expected) => comparison.Invoke(expected, actual);
base.Using(EqualityAdapter.For(invertedComparison));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied predicate function
/// </summary>
/// <param name="comparison">The comparison function to use.</param>
/// <returns>Self.</returns>
public CollectionSupersetConstraint Using <TSupersetType, TSubsetType>(Func <TSupersetType, TSubsetType, bool> comparison)
{
// internal code reverses the expected order of the arguments.
Func <TSubsetType, TSupersetType, bool> invertedComparison = (actual, expected) => comparison.Invoke(expected, actual);
base.Using(EqualityAdapter.For(invertedComparison));
return(this);
}
public static IEnumerable <EqualityAdapter> EqualityAdapters()
{
return(new[]
{
EqualityAdapter.For((IEqualityComparer)StringComparer.Ordinal),
EqualityAdapter.For((IEqualityComparer <string>)StringComparer.Ordinal),
EqualityAdapter.For <string, string>(StringComparer.Ordinal.Equals),
EqualityAdapter.For((IComparer)StringComparer.Ordinal),
EqualityAdapter.For((IComparer <string>)StringComparer.Ordinal),
EqualityAdapter.For <string>(StringComparer.Ordinal.Compare)
});
}
internal bool AreEqual(object x, object y, ref Tolerance tolerance, ComparisonState state)
{
this._failurePoints = new List <FailurePoint>();
if (x == null && y == null)
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
if (object.ReferenceEquals(x, y))
{
return(true);
}
if (state.DidCompare(x, y))
{
return(false);
}
EqualityAdapter externalComparer = GetExternalComparer(x, y);
if (externalComparer != null)
{
return(externalComparer.AreEqual(x, y));
}
foreach (EqualMethod equalMethod in _comparers)
{
bool?result = equalMethod(x, y, ref tolerance, state, this);
if (result.HasValue)
{
return(result.Value);
}
}
return(x.Equals(y));
}
/// <summary>
/// Compares two objects for equality within a tolerance.
/// </summary>
public bool AreEqual(object x, object y, ref Tolerance tolerance, bool topLevelComparison = true)
{
this.failurePoints = new List <FailurePoint>();
if (x == null && y == null)
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
if (object.ReferenceEquals(x, y))
{
return(true);
}
EqualityAdapter externalComparer = GetExternalComparer(x, y);
if (externalComparer != null)
{
return(externalComparer.AreEqual(x, y));
}
foreach (IChainComparer comparer in _comparers)
{
bool?result = comparer.Equal(x, y, ref tolerance, topLevelComparison);
if (result.HasValue)
{
return(result.Value);
}
}
return(x.Equals(y));
}
/// <summary>
/// Flag the constraint to use the supplied IEqualityComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public EqualConstraint Using <T>(IEqualityComparer <T> comparer)
{
_comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied predicate function
/// </summary>
/// <param name="comparison">The comparison function to use.</param>
/// <returns>Self.</returns>
public EqualConstraint Using <TCollectionType, TMemberType>(Func <TCollectionType, TMemberType, bool> comparison)
{
_comparer.ExternalComparers.Add(EqualityAdapter.For(comparison));
return(this);
}
/// <summary>
/// Compares two objects for equality within a tolerance.
/// </summary>
public bool AreEqual(object x, object y, ref Tolerance tolerance)
{
this.failurePoints = new ArrayList();
if (x == null && y == null)
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
if (object.ReferenceEquals(x, y))
{
return(true);
}
Type xType = x.GetType();
Type yType = y.GetType();
EqualityAdapter externalComparer = GetExternalComparer(x, y);
if (externalComparer != null)
{
return(externalComparer.AreEqual(x, y));
}
if (xType.IsArray && yType.IsArray && !compareAsCollection)
{
return(ArraysEqual((Array)x, (Array)y, ref tolerance));
}
if (x is IDictionary && y is IDictionary)
{
return(DictionariesEqual((IDictionary)x, (IDictionary)y, ref tolerance));
}
//if (x is ICollection && y is ICollection)
// return CollectionsEqual((ICollection)x, (ICollection)y, ref tolerance);
if (x is IEnumerable && y is IEnumerable && !(x is string && y is string))
{
return(EnumerablesEqual((IEnumerable)x, (IEnumerable)y, ref tolerance));
}
if (x is string && y is string)
{
return(StringsEqual((string)x, (string)y));
}
if (x is Stream && y is Stream)
{
return(StreamsEqual((Stream)x, (Stream)y));
}
if (x is DirectoryInfo && y is DirectoryInfo)
{
return(DirectoriesEqual((DirectoryInfo)x, (DirectoryInfo)y));
}
if (Numerics.IsNumericType(x) && Numerics.IsNumericType(y))
{
return(Numerics.AreEqual(x, y, ref tolerance));
}
if (tolerance != null && tolerance.Value is TimeSpan)
{
TimeSpan amount = (TimeSpan)tolerance.Value;
if (x is DateTime && y is DateTime)
{
return(((DateTime)x - (DateTime)y).Duration() <= amount);
}
if (x is TimeSpan && y is TimeSpan)
{
return(((TimeSpan)x - (TimeSpan)y).Duration() <= amount);
}
}
#if CLR_2_0 || CLR_4_0
if (FirstImplementsIEquatableOfSecond(xType, yType))
{
return(InvokeFirstIEquatableEqualsSecond(x, y));
}
else if (FirstImplementsIEquatableOfSecond(yType, xType))
{
return(InvokeFirstIEquatableEqualsSecond(y, x));
}
#endif
return(x.Equals(y));
}
/// <summary>
/// Flag the constraint to use the supplied boolean-returning delegate.
/// </summary>
/// <param name="comparer">The boolean-returning delegate to use.</param>
/// <returns>Self.</returns>
public EqualConstraint Using <T>(Func <T, T, bool> comparer)
{
_comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied Comparison object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public EqualConstraint Using <T>(Comparison <T> comparer)
{
this.comparer.ExternalComparer = EqualityAdapter.For(comparer);
return(this);
}
public static void CanCompareWithNull(EqualityAdapter adapter)
{
Assert.That(adapter.AreEqual(null, "a"), Is.False);
Assert.That(adapter.AreEqual("a", null), Is.False);
Assert.That(adapter.AreEqual(null, null), Is.True);
}
/// <summary>
/// Flag the constraint to use the supplied IComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public EqualConstraint Using(IComparer comparer)
{
this.comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied predicate function
/// </summary>
/// <param name="comparison">The comparison function to use.</param>
/// <returns>Self.</returns>
public CollectionSubsetConstraint Using <TSubsetType, TSupersetType>(Func <TSubsetType, TSupersetType, bool> comparison)
{
base.Using(EqualityAdapter.For(comparison));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied predicate function
/// </summary>
/// <param name="comparison">The comparison function to use.</param>
/// <returns>Self.</returns>
public CollectionEquivalentConstraint Using <TActual, TExpected>(Func <TActual, TExpected, bool> comparison)
{
base.Using(EqualityAdapter.For(comparison));
return(this);
}
private bool ObjectsEqual(object expected, object actual, ref Tolerance tolerance)
{
if (expected == null && actual == null)
{
return(true);
}
if (expected == null || actual == null)
{
return(false);
}
if (object.ReferenceEquals(expected, actual))
{
return(true);
}
Type xType = expected.GetType();
Type yType = actual.GetType();
EqualityAdapter externalComparer = GetExternalComparer(expected, actual);
if (externalComparer != null)
{
return(externalComparer.AreEqual(expected, actual));
}
if (xType.IsArray && yType.IsArray && !compareAsCollection)
{
return(ArraysEqual((Array)expected, (Array)actual, ref tolerance));
}
if (expected is IDictionary && actual is IDictionary)
{
return(DictionariesEqual((IDictionary)expected, (IDictionary)actual, ref tolerance));
}
// Issue #70 - EquivalentTo isn't compatible with IgnoreCase for dictionaries
if (expected is DictionaryEntry && actual is DictionaryEntry)
{
return(DictionaryEntriesEqual((DictionaryEntry)expected, (DictionaryEntry)actual, ref tolerance));
}
#if CLR_2_0 || CLR_4_0
// IDictionary<,> will eventually try to compare it's key value pairs when using CollectionTally
if (xType.IsGenericType && xType.GetGenericTypeDefinition() == typeof(KeyValuePair <,>) &&
yType.IsGenericType && yType.GetGenericTypeDefinition() == typeof(KeyValuePair <,>))
{
Tolerance keyTolerance = new Tolerance(0);
object xKey = xType.GetProperty("Key").GetValue(expected, null);
object yKey = yType.GetProperty("Key").GetValue(actual, null);
object xValue = xType.GetProperty("Value").GetValue(expected, null);
object yValue = yType.GetProperty("Value").GetValue(actual, null);
return(AreEqual(xKey, yKey, ref keyTolerance) && AreEqual(xValue, yValue, ref tolerance));
}
#endif
if (expected is IEnumerable && actual is IEnumerable && !(expected is string && actual is string))
{
return(EnumerablesEqual((IEnumerable)expected, (IEnumerable)actual, ref tolerance));
}
if (expected is string && actual is string)
{
return(StringsEqual((string)expected, (string)actual));
}
if (expected is Stream && actual is Stream)
{
return(StreamsEqual((Stream)expected, (Stream)actual));
}
if (expected is char && actual is char)
{
return(CharsEqual((char)expected, (char)actual));
}
if (expected is DirectoryInfo && actual is DirectoryInfo)
{
return(DirectoriesEqual((DirectoryInfo)expected, (DirectoryInfo)actual));
}
if (Numerics.IsNumericType(expected) && Numerics.IsNumericType(actual))
{
return(Numerics.AreEqual(expected, actual, ref tolerance));
}
if (tolerance != null && tolerance.Value is TimeSpan)
{
TimeSpan amount = (TimeSpan)tolerance.Value;
if (expected is DateTime && actual is DateTime)
{
return(((DateTime)expected - (DateTime)actual).Duration() <= amount);
}
#if CLR_2_0 || CLR_4_0
if (expected is DateTimeOffset && actual is DateTimeOffset)
{
return(((DateTimeOffset)expected - (DateTimeOffset)actual).Duration() <= amount);
}
#endif
if (expected is TimeSpan && actual is TimeSpan)
{
return(((TimeSpan)expected - (TimeSpan)actual).Duration() <= amount);
}
}
#if CLR_2_0 || CLR_4_0
if (FirstImplementsIEquatableOfSecond(xType, yType))
{
return(InvokeFirstIEquatableEqualsSecond(expected, actual));
}
else if (FirstImplementsIEquatableOfSecond(yType, xType))
{
return(InvokeFirstIEquatableEqualsSecond(actual, expected));
}
#endif
return(expected.Equals(actual));
}
/// <summary>
/// Flag the constraint to use the supplied IComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public CollectionItemsEqualConstraint Using <T>(IComparer <T> comparer)
{
return(Using(EqualityAdapter.For(comparer)));
}
/// <summary>
/// Flag the constraint to use the supplied EqualityAdapter.
/// NOTE: For internal use only.
/// </summary>
/// <param name="adapter">The EqualityAdapter to use.</param>
/// <returns>Self.</returns>
internal CollectionItemsEqualConstraint Using(EqualityAdapter adapter)
{
this.comparer.ExternalComparers.Add(adapter);
return(this);
}
private bool ObjectsEqual(object expected, object actual, ref Tolerance tolerance)
{
if (expected == null && actual == null)
{
return(true);
}
if (expected == null || actual == null)
{
return(false);
}
if (object.ReferenceEquals(expected, actual))
{
return(true);
}
Type xType = expected.GetType();
Type yType = actual.GetType();
EqualityAdapter externalComparer = GetExternalComparer(expected, actual);
if (externalComparer != null)
{
return(externalComparer.AreEqual(expected, actual));
}
if (xType.IsArray && yType.IsArray && !compareAsCollection)
{
return(ArraysEqual((Array)expected, (Array)actual, ref tolerance));
}
if (expected is IDictionary && actual is IDictionary)
{
return(DictionariesEqual((IDictionary)expected, (IDictionary)actual, ref tolerance));
}
if (expected is IEnumerable && actual is IEnumerable && !(expected is string && actual is string))
{
return(EnumerablesEqual((IEnumerable)expected, (IEnumerable)actual, ref tolerance));
}
if (expected is string && actual is string)
{
return(StringsEqual((string)expected, (string)actual));
}
if (expected is Stream && actual is Stream)
{
return(StreamsEqual((Stream)expected, (Stream)actual));
}
#if !PORTABLE
if (expected is DirectoryInfo && actual is DirectoryInfo)
{
return(DirectoriesEqual((DirectoryInfo)expected, (DirectoryInfo)actual));
}
#endif
if (Numerics.IsNumericType(expected) && Numerics.IsNumericType(actual))
{
return(Numerics.AreEqual(expected, actual, ref tolerance));
}
if (tolerance != null && tolerance.Value is TimeSpan)
{
TimeSpan amount = (TimeSpan)tolerance.Value;
if (expected is DateTime && actual is DateTime)
{
return(((DateTime)expected - (DateTime)actual).Duration() <= amount);
}
if (expected is TimeSpan && actual is TimeSpan)
{
return(((TimeSpan)expected - (TimeSpan)actual).Duration() <= amount);
}
}
#if (CLR_2_0 || CLR_4_0) && !NETCF
if (FirstImplementsIEquatableOfSecond(xType, yType))
{
return(InvokeFirstIEquatableEqualsSecond(expected, actual));
}
else if (FirstImplementsIEquatableOfSecond(yType, xType))
{
return(InvokeFirstIEquatableEqualsSecond(actual, expected));
}
#endif
return(expected.Equals(actual));
}
/// <summary>
/// Flag the constraint to use the supplied Comparison object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public CollectionItemsEqualConstraint Using <T>(Comparison <T> comparer)
{
this.comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied IComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public ContainsConstraint Using(IComparer comparer)
{
return(AddAdapter(EqualityAdapter.For(comparer)));
}
public bool AreEqual(object x, object y, ref Tolerance tolerance)
{
failurePoints = new ObjectList();
if (x == null && y == null)
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
if (object.ReferenceEquals(x, y))
{
return(true);
}
Type type = x.GetType();
Type type2 = y.GetType();
EqualityAdapter externalComparer = GetExternalComparer(x, y);
if (externalComparer != null)
{
return(externalComparer.AreEqual(x, y));
}
if (type.IsArray && type2.IsArray && !compareAsCollection)
{
return(ArraysEqual((Array)x, (Array)y, ref tolerance));
}
if (x is IDictionary && y is IDictionary)
{
return(DictionariesEqual((IDictionary)x, (IDictionary)y, ref tolerance));
}
if (x is IEnumerable && y is IEnumerable && (!(x is string) || !(y is string)))
{
return(EnumerablesEqual((IEnumerable)x, (IEnumerable)y, ref tolerance));
}
if (x is string && y is string)
{
return(StringsEqual((string)x, (string)y));
}
if (x is Stream && y is Stream)
{
return(StreamsEqual((Stream)x, (Stream)y));
}
if (Numerics.IsNumericType(x) && Numerics.IsNumericType(y))
{
return(Numerics.AreEqual(x, y, ref tolerance));
}
if (tolerance != null && tolerance.Value is TimeSpan)
{
TimeSpan timeSpan = (TimeSpan)tolerance.Value;
if (x is DateTime && y is DateTime)
{
return(((DateTime)x - (DateTime)y).Duration() <= timeSpan);
}
if (x is TimeSpan && y is TimeSpan)
{
return(((TimeSpan)x - (TimeSpan)y).Duration() <= timeSpan);
}
}
return(x.Equals(y));
}
private ContainsConstraint AddAdapter(EqualityAdapter adapter)
{
this.equalityAdapters.Add(adapter);
return(this);
}
/// <summary>
/// Compares two objects for equality within a tolerance.
/// </summary>
public bool AreEqual(object x, object y, ref Tolerance tolerance)
{
this.failurePoints = new List <FailurePoint>();
if (x == null && y == null)
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
if (object.ReferenceEquals(x, y))
{
return(true);
}
Type xType = x.GetType();
Type yType = y.GetType();
Type xGenericTypeDefinition = xType.IsGenericType ? xType.GetGenericTypeDefinition() : null;
Type yGenericTypeDefinition = yType.IsGenericType ? yType.GetGenericTypeDefinition() : null;
EqualityAdapter externalComparer = GetExternalComparer(x, y);
if (externalComparer != null)
{
return(externalComparer.AreEqual(x, y));
}
if (xType.IsArray && yType.IsArray && !compareAsCollection)
{
return(ArraysEqual((Array)x, (Array)y, ref tolerance));
}
if (x is IDictionary && y is IDictionary)
{
return(DictionariesEqual((IDictionary)x, (IDictionary)y, ref tolerance));
}
// Issue #70 - EquivalentTo isn't compatible with IgnoreCase for dictionaries
if (x is DictionaryEntry && y is DictionaryEntry)
{
return(DictionaryEntriesEqual((DictionaryEntry)x, (DictionaryEntry)y, ref tolerance));
}
// IDictionary<,> will eventually try to compare it's key value pairs when using CollectionTally
if (xGenericTypeDefinition == typeof(KeyValuePair <,>) &&
yGenericTypeDefinition == typeof(KeyValuePair <,>))
{
var keyTolerance = Tolerance.Exact;
object xKey = xType.GetProperty("Key").GetValue(x, null);
object yKey = yType.GetProperty("Key").GetValue(y, null);
object xValue = xType.GetProperty("Value").GetValue(x, null);
object yValue = yType.GetProperty("Value").GetValue(y, null);
return(AreEqual(xKey, yKey, ref keyTolerance) && AreEqual(xValue, yValue, ref tolerance));
}
//if (x is ICollection && y is ICollection)
// return CollectionsEqual((ICollection)x, (ICollection)y, ref tolerance);
if (x is string && y is string)
{
return(StringsEqual((string)x, (string)y));
}
if (x is IEnumerable && y is IEnumerable)
{
return(EnumerablesEqual((IEnumerable)x, (IEnumerable)y, ref tolerance));
}
if (x is Stream && y is Stream)
{
return(StreamsEqual((Stream)x, (Stream)y));
}
if (x is char && y is char)
{
return(CharsEqual((char)x, (char)y));
}
#if !PORTABLE
if (x is DirectoryInfo && y is DirectoryInfo)
{
return(DirectoriesEqual((DirectoryInfo)x, (DirectoryInfo)y));
}
#endif
if (Numerics.IsNumericType(x) && Numerics.IsNumericType(y))
{
return(Numerics.AreEqual(x, y, ref tolerance));
}
#if !NETCF
if (x is DateTimeOffset && y is DateTimeOffset)
{
bool result;
DateTimeOffset xAsOffset = (DateTimeOffset)x;
DateTimeOffset yAsOffset = (DateTimeOffset)y;
if (tolerance != null && tolerance.Value is TimeSpan)
{
TimeSpan amount = (TimeSpan)tolerance.Value;
result = (xAsOffset - yAsOffset).Duration() <= amount;
}
else
{
result = xAsOffset == yAsOffset;
}
if (result && WithSameOffset)
{
result = xAsOffset.Offset == yAsOffset.Offset;
}
return(result);
}
#endif
if (tolerance != null && tolerance.Value is TimeSpan)
{
TimeSpan amount = (TimeSpan)tolerance.Value;
if (x is DateTime && y is DateTime)
{
return(((DateTime)x - (DateTime)y).Duration() <= amount);
}
if (x is TimeSpan && y is TimeSpan)
{
return(((TimeSpan)x - (TimeSpan)y).Duration() <= amount);
}
}
if (FirstImplementsIEquatableOfSecond(xType, yType))
{
return(InvokeFirstIEquatableEqualsSecond(x, y));
}
else if (xType != yType && FirstImplementsIEquatableOfSecond(yType, xType))
{
return(InvokeFirstIEquatableEqualsSecond(y, x));
}
return(x.Equals(y));
}
/// <summary>
/// Flag the constraint to use the supplied IComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public CollectionItemsEqualConstraint Using(IComparer comparer)
{
_comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied IEqualityComparer object.
/// </summary>
/// <param name="comparer">The IEqualityComparer object to use.</param>
public AnyOfConstraint Using(IEqualityComparer comparer)
{
_comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied IEqualityComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public ContainsConstraint Using <T>(IEqualityComparer <T> comparer)
{
return(AddAdapter(EqualityAdapter.For(comparer)));
}
/// <summary>
/// Flag the constraint to use the supplied IEqualityComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public CollectionItemsEqualConstraint Using <T>(IEqualityComparer <T> comparer)
{
this.comparer.ExternalComparer = EqualityAdapter.For(comparer);
return(this);
}
/// <summary>
/// Flag the constraint to use the supplied IEqualityComparer object.
/// </summary>
/// <param name="comparer">The IComparer object to use.</param>
/// <returns>Self.</returns>
public ContainsConstraint Using <T>(IEqualityComparer <T> comparer)
{
this.adapter = EqualityAdapter.For(comparer);
return(this);
}