describeGraphQL() util method for gql test

describe-graphql.js

import { graphql } from 'graphql'
import mongoose from 'mongoose'
import { Mockgoose } from 'mockgoose'
import '../../src/models/all'
import { expect } from 'chai'
import { compileSchemas } from '../../src/graphql/utils/compileSchema'

const internalDescribeQL = (describeFn) => (title, body) => {

  describeFn(title, () => {
    let schema

    const mockgoose = new Mockgoose(mongoose);

    before(async () => {
      await mockgoose.prepareStorage()
      await mongoose.connect('mongodb://example.com/TestingDB')
      schema = compileSchemas()
    })

    after(done => {
      mongoose.disconnect(done)
    })

    beforeEach(() => {
      mockgoose.helper.reset()
    })

    const expectQuery = async(query, expected) => {
      expect(await graphql(schema, query, undefined, { })).to.deep.equal(expected)
    }

    const expectQueryResult = (query, expected) => {
      return expectQuery(query, { data: expected })
    }

    body({ expectQuery, expectQueryResult }, schema)

  })
}

export const describeGQL = internalDescribeQL(describe)
describeGQL.only = internalDescribeQL(describe.only)
describeGQL.skip = internalDescribeQL(describe.skip)