public void GetFieldDependencies()
{
// arrange
ISchema schema = Schema.Create(
FileResource.Open("Stitching.graphql"),
c =>
{
c.RegisterType <DateTimeType>();
c.RegisterDirective <DelegateDirectiveType>();
c.Use(next => context => Task.CompletedTask);
});
DocumentNode query = Utf8GraphQLParser.Parse(
FileResource.Open("StitchingQuery.graphql"));
FieldNode selection = query.Definitions
.OfType <OperationDefinitionNode>().Single()
.SelectionSet.Selections
.OfType <FieldNode>().Single();
// act
var fieldDependencyResolver = new FieldDependencyResolver(schema);
ISet <FieldDependency> dependencies = fieldDependencyResolver
.GetFieldDependencies(
query,
selection,
schema.GetType <ObjectType>("Customer"));
// assert
Snapshot.Match(dependencies);
}
protected override SelectionSetNode RewriteSelectionSet(
SelectionSetNode node,
Context context)
{
SelectionSetNode current = node;
var selections = new List <ISelectionNode>(current.Selections);
ISet <FieldDependency> dependencies =
_dependencyResolver.GetFieldDependencies(
context.Document, current, context.TypeContext);
RemoveDelegationFields(current, context, selections);
AddDependencies(context.TypeContext, selections, dependencies);
if (!selections.OfType <FieldNode>().Any(n => n.Name.Value == WellKnownFieldNames.TypeName))
{
selections.Add(CreateField(WellKnownFieldNames.TypeName));
}
current = current.WithSelections(selections);
current = base.RewriteSelectionSet(current, context);
current = OnRewriteSelectionSet(current, context);
return(current);
}