graphql-mocks/es/graphql/utils/attach-type-resolvers-to-schema.js

Tools for setting up graphql test resolvers

import { isAbstractType } from 'graphql';

function attachTypeResolversToSchema(schema, resolverMap) {
  for (var typeName in resolverMap) {
    var type = schema.getType(typeName); //  Note: __resolveType for type resolvers is a convention borrowed from
    //  graphql-tools resolver maps. This allows a single ResolverMap to be used
    // for both type resolvers for abstract types (unions & interfaces), as well
    // as field resolvers

    var typeResolver = resolverMap[typeName].__resolveType;
    var hasTypeResolver = Boolean(typeResolver);

    if (hasTypeResolver && isAbstractType(type)) {
      type.resolveType = typeResolver;
    }
  }
}

export { attachTypeResolversToSchema };
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