@vagalumedigital/gatsby-plugin-mailchimp-api/tests/gatsby-node.test.js

A plugin written to use Mailchimp API v3 to add/update users subscribed on a list

const { onCreateWebpackConfig } = require('../gatsby-node');

describe('gatsby-node > onCreateWebpackConfig', () => {
  const plugins = {};
  const actions = {};

  beforeEach(() => {
    plugins.define = jest.fn();
    actions.setWebpackConfig = jest.fn();
  });

  it('Throws an error when key is not a string', () => {
    const key = 123;
    expect(() => onCreateWebpackConfig({ plugins, actions }, { key })).toThrow(Error);
    expect(actions.setWebpackConfig).not.toHaveBeenCalled();
    expect(plugins.define).not.toHaveBeenCalled();
  });

  it('Throws an error when id is not a string', () => {
    const id = 123;
    expect(() => onCreateWebpackConfig({ plugins, actions }, { id })).toThrow(Error);
    expect(actions.setWebpackConfig).not.toHaveBeenCalled();
    expect(plugins.define).not.toHaveBeenCalled();
  });

  describe('Options -> calls set setWebpackConfig and define variables correctly', () => {
    it('valid values', () => {
      const id = `asabvscas`;
      const key = `asabvscas`;

      expect(actions.setWebpackConfig).not.toHaveBeenCalled();
      expect(plugins.define).not.toHaveBeenCalled();

      onCreateWebpackConfig({ plugins, actions }, { id, key });

      expect(actions.setWebpackConfig).toHaveBeenCalledTimes(1);
      expect(plugins.define).toHaveBeenCalledTimes(1);
      expect(plugins.define).toHaveBeenCalledWith(
        expect.objectContaining({
          __GATSBY_PLUGIN_MAILCHIMP_API_LIST_ID__: expect.any(String),
          __GATSBY_PLUGIN_MAILCHIMP_API_KEY__: expect.any(String),
        }),
      );
    });
  });
});