public void GetTypeArgumentsForUpdatableGenericCollection_ModelTypeWrongNumberOfGenericArguments_Fail()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(KeyValuePair <int, string>));
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(ICollection <>), null, modelMetadata);
// Assert
Assert.Null(typeArguments);
}
public void GetTypeArgumentsForUpdatableGenericCollection_ModelTypeOpenGeneric_Fail()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(IList <>));
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(null, null, modelMetadata);
// Assert
Assert.Null(typeArguments);
}
public void GetTypeArgumentsForUpdatableGenericCollection_ModelTypeNotGeneric_Fail()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(int));
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(null, null, modelMetadata);
// Assert
Assert.IsNull(typeArguments, "The given model type was not generic.");
}
public void GetTypeArgumentsForUpdatableGenericCollection_ReadWriteReference_NewInstanceNotAssignableToModelType_MutableInstance_Success()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => new Collection <int>(), typeof(Collection <int>));
modelMetadata.IsReadOnly = false;
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(ICollection <>), typeof(List <>), modelMetadata);
// Assert
Assert.Equal(new[] { typeof(int) }, typeArguments);
}
public void GetTypeArgumentsForUpdatableGenericCollection_ReadOnlyReference_ModelIsNull_Fail()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(IList <int>));
modelMetadata.IsReadOnly = true;
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(ICollection <>), typeof(List <>), modelMetadata);
// Assert
Assert.Null(typeArguments);
}
public void GetTypeArgumentsForUpdatableGenericCollection_ReadOnlyReference_ModelInstanceMutable_Valid()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => new List <int>(), typeof(IList <int>));
modelMetadata.IsReadOnly = true;
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(IList <>), typeof(List <>), modelMetadata);
// Assert
Assert.Equal(new[] { typeof(int) }, typeArguments);
}
public void GetTypeArgumentsForUpdatableGenericCollection_ReadWriteReference_NewInstanceAssignableToModelType_Success()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(IList <int>));
modelMetadata.IsReadOnly = false;
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(ICollection <>), typeof(List <>), modelMetadata);
// Assert
CollectionAssert.AreEqual(new Type[] { typeof(int) }, typeArguments, "Mutable reference can be overwritten.");
}
public void GetTypeArgumentsForUpdatableGenericCollection_ReadOnlyReference_ModelInstanceImmutable_Valid()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => new int[0], typeof(IList <int>));
modelMetadata.IsReadOnly = true;
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(IList <>), typeof(List <>), modelMetadata);
// Assert
Assert.IsNull(typeArguments, "Collection instance is immutable and reference is readonly.");
}
public void GetTypeArgumentsForUpdatableGenericCollection_ReadOnlyReference_ModelInstanceOfWrongType_Fail()
{
// Arrange
ModelMetadata modelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => new HashSet <int>(), typeof(ICollection <int>));
modelMetadata.IsReadOnly = true;
// Act
Type[] typeArguments = CollectionModelBinderUtil.GetTypeArgumentsForUpdatableGenericCollection(typeof(IList <>), typeof(List <>), modelMetadata);
// Assert
// HashSet<> is not an IList<>, so we can't update
Assert.Null(typeArguments);
}