Examples of testing and mocking generated clients

[jezzsantos]

I really like this tool, but I am finding it very hard to mock and test the use of the generated services (based on Axios).

What I really want to see is how you've mocked axios and @hey-api libraries so you can test the use of them.
(preferably in Jest if possible)

[mrlubos]

I wonder if #1111 is related

[jezzsantos]

I'm getting by right now with this mock (using jest).

jest.mock("@hey-api/client-axios", () => {
  const actualImpl = jest.requireActual("@hey-api/client-axios");

  return {
    ...actualImpl,
    createClient: jest.fn().mockImplementation((config) => {
      const createClientImpl = actualImpl.createClient(config);
      return {
        ...createClientImpl,
        get: jest.fn((config) => Promise.resolve({ config, data: {}, status: 200 })),
        post: jest.fn((config) => Promise.resolve({ config, data: {}, status: 200 })),
        put: jest.fn((config) => Promise.resolve({ config, data: {}, status: 200 })),
        delete: jest.fn((config) => Promise.resolve({ config, data: {}, status: 200 }))
      };
    })
  };
});

However, I am going to want to override the methods like get and post in individual tests.
There does not seem to be an easy way to do this, per test?

Anyone have experience with this?

[mrlubos]

@jezzsantos Is this specific to the Hey API client or would you have the same question if you were working with Axios directly?

[jezzsantos]

@mrlubos I'm not really having issues mocking axios directly so far, since all methods are top-level in the module.
However, in the Hey API (axios-client), the mocks are nested below the createClient method, which makes it far harder to mock these methods in individual tests.