public void CreateOrReplaceCollection_OriginalModelMutable_UpdatesOriginalInstance()
{
// Arrange
List <int> originalInstance = new List <int> {
10, 20, 30
};
ExtensibleModelBindingContext bindingContext = new ExtensibleModelBindingContext
{
ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(
() => originalInstance,
typeof(ICollection <int>)
)
};
// Act
CollectionModelBinderUtil.CreateOrReplaceCollection(
bindingContext,
new[] { 40, 50, 60 },
() => new List <int>()
);
// Assert
Assert.Same(originalInstance, bindingContext.Model);
Assert.Equal(new[] { 40, 50, 60 }, originalInstance.ToArray());
}
// Extensibility point that allows the bound collection to be manipulated or transformed before
// being returned from the binder.
protected virtual bool CreateOrReplaceCollection(
HttpActionContext actionContext,
ModelBindingContext bindingContext,
IList <TElement> newCollection
)
{
CollectionModelBinderUtil.CreateOrReplaceCollection(
bindingContext,
newCollection,
() => new List <TElement>()
);
return(true);
}
public void CreateOrReplaceCollection_OriginalModelNotCollection_CreatesNewInstance()
{
// Arrange
ExtensibleModelBindingContext bindingContext = new ExtensibleModelBindingContext
{
ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(ICollection <int>))
};
// Act
CollectionModelBinderUtil.CreateOrReplaceCollection(bindingContext, new[] { 10, 20, 30 }, () => new List <int>());
// Assert
int[] newModel = (bindingContext.Model as ICollection <int>).ToArray();
Assert.Equal(new[] { 10, 20, 30 }, newModel);
}
public void CreateOrReplaceCollection_OriginalModelMutable_UpdatesOriginalInstance()
{
// Arrange
List <int> originalInstance = new List <int>()
{
10, 20, 30
};
ExtensibleModelBindingContext bindingContext = new ExtensibleModelBindingContext()
{
ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => originalInstance, typeof(ICollection <int>))
};
// Act
CollectionModelBinderUtil.CreateOrReplaceCollection <int>(bindingContext, new int[] { 40, 50, 60 }, () => new List <int>());
// Assert
Assert.AreSame(originalInstance, bindingContext.Model, "Original collection should have been updated.");
CollectionAssert.AreEqual(new int[] { 40, 50, 60 }, originalInstance);
}