public void ExtractField_WithCustomRewriters()
{
// arrange
ISchema schema = Schema.Create(
FileResource.Open("Stitching.graphql"),
c =>
{
c.RegisterType <DateTimeType>();
c.RegisterDirective <DelegateDirectiveType>();
c.RegisterDirective <ComputedDirectiveType>();
c.Use(next => context => Task.CompletedTask);
});
DocumentNode query = Utf8GraphQLParser.Parse(
FileResource.Open("StitchingQuery.graphql"));
OperationDefinitionNode operation = query.Definitions
.OfType <OperationDefinitionNode>().Single();
FieldNode selection = operation
.SelectionSet.Selections
.OfType <FieldNode>().First();
var rewriters = new List <IQueryDelegationRewriter>
{
new DummyRewriter()
};
// act
var rewriter = new ExtractFieldQuerySyntaxRewriter(
schema, rewriters);
ExtractedField extractedField = rewriter.ExtractField(
"customer", query, operation, selection,
schema.GetType <ObjectType>("Query"));
// assert
DocumentNode document = RemoteQueryBuilder.New()
.SetRequestField(extractedField.Field)
.AddFragmentDefinitions(extractedField.Fragments)
.AddVariables(extractedField.Variables)
.Build();
QuerySyntaxSerializer.Serialize(document)
.MatchSnapshot();
}
private static IReadOnlyQueryRequest CreateQuery(
IMiddlewareContext context,
NameString schemaName,
IImmutableStack <SelectionPathComponent> path)
{
var fieldRewriter = new ExtractFieldQuerySyntaxRewriter(
context.Schema,
context.Service <IEnumerable <IQueryDelegationRewriter> >());
OperationType operationType =
context.Schema.IsRootType(context.ObjectType)
? context.Operation.Operation
: OperationType.Query;
ExtractedField extractedField = fieldRewriter.ExtractField(
schemaName, context.Document, context.Operation,
context.FieldSelection, context.ObjectType);
IEnumerable <VariableValue> scopedVariables =
ResolveScopedVariables(
context, schemaName, operationType, path);
IReadOnlyCollection <VariableValue> variableValues =
CreateVariableValues(
context, scopedVariables, extractedField);
DocumentNode query = RemoteQueryBuilder.New()
.SetOperation(operationType)
.SetSelectionPath(path)
.SetRequestField(extractedField.Field)
.AddVariables(CreateVariableDefs(variableValues))
.AddFragmentDefinitions(extractedField.Fragments)
.Build();
var requestBuilder = QueryRequestBuilder.New();
AddVariables(context, schemaName,
requestBuilder, query, variableValues);
requestBuilder.SetQuery(query);
requestBuilder.AddProperty(
WellKnownProperties.IsAutoGenerated,
true);
return(requestBuilder.Create());
}
public void ExtractField(string schemaFile, string queryFile)
{
// arrange
ISchema schema = Schema.Create(
FileResource.Open(schemaFile),
c =>
{
c.RegisterType <DateTimeType>();
c.RegisterDirective <DelegateDirectiveType>();
c.RegisterDirective <ComputedDirectiveType>();
c.Use(next => context => Task.CompletedTask);
});
DocumentNode query = Parser.Default.Parse(
FileResource.Open(queryFile));
OperationDefinitionNode operation = query.Definitions
.OfType <OperationDefinitionNode>().Single();
FieldNode selection = operation
.SelectionSet.Selections
.OfType <FieldNode>().First();
// act
var rewriter = new ExtractFieldQuerySyntaxRewriter(schema,
Array.Empty <IQueryDelegationRewriter>());
ExtractedField extractedField = rewriter.ExtractField(
"customer", query, operation, selection,
schema.GetType <ObjectType>("Query"));
// assert
DocumentNode document = RemoteQueryBuilder.New()
.SetRequestField(extractedField.Field)
.AddFragmentDefinitions(extractedField.Fragments)
.AddVariables(extractedField.Variables)
.Build();
QuerySyntaxSerializer.Serialize(document)
.MatchSnapshot(new SnapshotNameExtension(
schemaFile, queryFile));
}
