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 (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)
{
var 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
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 EqualityAdapter.
/// NOTE: For internal use only.
/// </summary>
/// <param name="adapter">The EqualityAdapter to use.</param>
/// <returns>Self.</returns>
internal CollectionItemsEqualConstraint Using(EqualityAdapter adapter)
{
comparer.ExternalComparers.Add(adapter);
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 CollectionItemsEqualConstraint Using <T>(Comparison <T> comparer)
{
return(Using(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(IEqualityComparer comparer)
{
return(Using(EqualityAdapter.For(comparer)));
}
private ContainsConstraint AddAdapter(EqualityAdapter adapter)
{
equalityAdapters.Add(adapter);
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 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)));
}
/// <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)
{
this.comparer.ExternalComparers.Add(EqualityAdapter.For(comparer));
return(this);
}