private static bool AssertSameLength(Comparands comparands, DictionaryInterfaceInfo actualDictionary,
DictionaryInterfaceInfo expectedDictionary)
{
if (comparands.Subject is ICollection subjectCollection &&
comparands.Expectation is ICollection expectationCollection &&
subjectCollection.Count == expectationCollection.Count)
{
return(true);
}
return((bool)AssertSameLengthMethod
.MakeGenericMethod(actualDictionary.Key, actualDictionary.Value, expectedDictionary.Key, expectedDictionary.Value)
.Invoke(null, new[] { comparands.Subject, comparands.Expectation }));
}
#pragma warning restore SA1110
public EquivalencyResult Handle(Comparands comparands, IEquivalencyValidationContext context,
IEquivalencyValidator nestedValidator)
{
if (comparands.Expectation != null)
{
Type expectationType = comparands.GetExpectedType(context.Options);
bool isDictionary = DictionaryInterfaceInfo.TryGetFrom(expectationType, "expectation", out var expectedDictionary);
if (isDictionary)
{
Handle(comparands, expectedDictionary, context, nestedValidator);
return(EquivalencyResult.AssertionCompleted);
}
}
return(EquivalencyResult.ContinueWithNext);
}
private static void Handle(Comparands comparands, DictionaryInterfaceInfo expectedDictionary,
IEquivalencyValidationContext context,
IEquivalencyValidator nestedValidator)
{
if (AssertSubjectIsNotNull(comparands.Subject) &&
AssertExpectationIsNotNull(comparands.Subject, comparands.Expectation))
{
var(isDictionary, actualDictionary) = EnsureSubjectIsDictionary(comparands, expectedDictionary);
if (isDictionary)
{
if (AssertSameLength(comparands, actualDictionary, expectedDictionary))
{
AssertDictionaryEquivalence(comparands, context, nestedValidator, actualDictionary, expectedDictionary);
}
}
}
}
private static (bool isDictionary, DictionaryInterfaceInfo info) EnsureSubjectIsDictionary(Comparands comparands,
DictionaryInterfaceInfo expectedDictionary)
{
bool isDictionary = DictionaryInterfaceInfo.TryGetFromWithKey(comparands.Subject.GetType(), "subject",
expectedDictionary.Key, out var actualDictionary);
if (!isDictionary)
{
if (expectedDictionary.TryConvertFrom(comparands.Subject, out var convertedSubject))
{
comparands.Subject = convertedSubject;
isDictionary = DictionaryInterfaceInfo.TryGetFrom(comparands.Subject.GetType(), "subject", out actualDictionary);
}
}
if (!isDictionary)
{
AssertionScope.Current.FailWith(
$"Expected {{context:subject}} to be a dictionary or collection of key-value pairs that is keyed to type {expectedDictionary.Key}. " +
$"It implements {actualDictionary}.");
}
return(isDictionary, actualDictionary);
}
private static void AssertDictionaryEquivalence(Comparands comparands, IEquivalencyValidationContext context,
IEquivalencyValidator parent, DictionaryInterfaceInfo actualDictionary, DictionaryInterfaceInfo expectedDictionary)
{
AssertDictionaryEquivalenceMethod
.MakeGenericMethod(actualDictionary.Key, actualDictionary.Value, expectedDictionary.Key, expectedDictionary.Value)
.Invoke(null, new[] { context, parent, context.Options, comparands.Subject, comparands.Expectation });
}