unpkg/modules/__tests__/_publicKey-test.js

const request = require('supertest');

const createServer = require('../createServer');

describe('The /_publicKey endpoint', () => {
  let server;
  beforeEach(() => {
    server = createServer();
  });

  describe('GET /_publicKey', () => {
    it('echoes the public key', done => {
      request(server)
        .get('/_publicKey')
        .end((err, res) => {
          expect(res.text).toMatch(/PUBLIC KEY/);
          done();
        });
    });
  });
});