OpticQL

Performance testing for GraphQL endpoints

This package accompanies the OpticQL Electron app which can be downloaded from https://github.com/oslabs-beta/OpticQL

Note on Express :

You must be running an Express (NodeJS) server for this package to work

Step 1:

In your server.js file, require in 'optic-ql' :

const { opticQL } = require("optic-ql");

Step 2:

Pass your GraphQL schema typeDefs, resolvers and Express app instance in as arguments to 'opticQL' :

opticQL(typeDefs, resolvers, app)

Step 3:

Start your server on port 3000 (it must be port 3000 to interact properly with the Electron app)

Step 4:

From Electron app, click 'Import Schema'. Your schema will be imported to Electron app. Now you are ready to run GraphQL queries. In addition, at port 3000/graphql you will have an Apollo GraphQL query interface set up (for further testing convenience if performance metrics not needed)

Note

As shown below, for Mutation types, each field must be followed by a ',' for the visualization to work for Mutation commands in Electron app.

Example set-up :

const express = require('express');
const cors = require('cors')
const { opticQL } = require("optic-ql");
const db = require('./models/starwarsModel.js');
const app = express();
app.use(cors())
const PORT = 3000;

const typeDefs = `
type Query {
  people: [Person!]!
  person(_id: Int!): Person!
}
type Mutation {
  createPerson(
	gender: String,
	height: Int,
	mass: String,
	hair_color: String,
	skin_color: String,
	eye_color: String,
	name: String!,
	birth_year: String,
  ): Person!
}
`
const resolvers = {
	Query: {
		person: (parent, args) => {
			try {
				const query = 'SELECT * FROM people WHERE _id = $1';
				const values = [args._id];
				return db.query(query, values).then((res) => res.rows[0]);
			} catch (err) {
				throw new Error(err);
	    }
    },
  }
}

opticQL(typeDefs, resolvers, app)
app.listen({ port: PORT }, () =>
  console.log(`🚀 Server ready at http://localhost:3000/graphql`));