@petition-blitz/email-verifiers/tests/verifiers/datavalidation.test.js

Unified interface for checking email address deliverability

const assert = require('assert');
const fetchMock = require('fetch-mock');
const createVerifier = require('../../src/verifiers/datavalidation');

function mockResponse (email, grade) {
  const url = 'https://dv3.datavalidation.com/api/v2/realtime/?email=' + encodeURIComponent(email);

  const res = {
    status: 200,
    body: {
      status: 'ok',
      grade,
      disposable: false,
      email,
      role_based: true
    }
  };

  fetchMock.mock(url, res);
}

describe('datavalidation', function () {
  describe('verify()', function () {
    const verify = createVerifier({
      apiKey: 'MOCK_API_KEY', accept: ['A', 'A+', 'B']
    });

    afterEach(() => fetchMock.restore());

    it('returns a Promise', function () {
      mockResponse('test1@example.com', 'A+');
      assert(verify({ email: 'test1@example.com' }) instanceof Promise);
    });

    it('resolves to true for acceptable grades', async function () {
      mockResponse('test1@example.com', 'A+');
      mockResponse('test2@example.com', 'A');
      mockResponse('test3@example.com', 'B');
      assert.strictEqual(true, await verify({ email: 'test1@example.com' }));
      assert.strictEqual(true, await verify({ email: 'test2@example.com' }));
      assert.strictEqual(true, await verify({ email: 'test3@example.com' }));
    });

    it('resolves to false for unacceptable grades', async function () {
      mockResponse('test4@example.com', 'D');
      mockResponse('test5@example.com', 'F');
      assert.strictEqual(false, await verify({ email: 'test4@example.com' }));
      assert.strictEqual(false, await verify({ email: 'test5@example.com' }));
    });
  });
});