graphql-mocks/relay/wrapper.js

Tools for setting up graphql test resolvers

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});

require('graphql');

var createWrapper = require('../resolver/create-wrapper.js');

var coerceToList = require('../resolver/utils/coerce-to-list.js');

var isRelayConnectionField = require('./is-relay-connection-field.js');

var paginateNodes = require('./paginate-nodes.js');

const relayWrapper = ({
  cursorForNode,
  force
}) => {
  var _force;

  force = (_force = force) !== null && _force !== void 0 ? _force : false;

  if (!cursorForNode) {
    throw new Error('cursorForNode is a required, provide it as an option to `relayWrapper`');
  }

  return createWrapper.createWrapper('relay-wrapper', 'FIELD', resolver => {
    return async (parent, args, context, info) => {
      const {
        fieldName,
        parentType
      } = info;
      const field = parentType.getFields()[fieldName];
      const isRelayPaginated = isRelayConnectionField.isRelayConnectionField(field);
      const result = await resolver(parent, args, context, info);

      if (force || isRelayPaginated) {
        const nodes = coerceToList.coerceToList(result);
        return nodes && paginateNodes.paginateNodes(nodes, args, cursorForNode);
      }

      return result;
    };
  });
};

exports.relayWrapper = relayWrapper;
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