sinonExample.js

import sinon from 'sinon';
import expect from 'chai';
import factory from '../../../factory';
import * as resolvers from '../../../graphql/resolvers';
import * as service from '../../../services/service';

describe('resolvers', async () => {
  let sandbox;
  beforeEach(() => {
    sandbox = sinon.sandbox.create();
  });
  afterEach(() => {
    sandbox.restore();
  });

  test.serial('should ensure that it gets called with the correct parameters', async () => {
    const args = {
      historical: true,
      first: 25,
      after: undefined,
    };
    const someStuff = await factory.create('someStuff');
    context.someStuff = someStuff;

    const stub = sinon.stub(service, 'serviceFunction');

    resolvers.resolverFunction(stub, undefined, args, context);

    expect(service.serviceFunction.getCall(0).args).to.deep.equal([true, 25, undefined]);
  });
});