Jest mock test using Sanity npm package

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I have some code in my sanity.ts file:

import sanityClient from '@sanity/client';

// eslint-disable-next-line @typescript-eslint/no-var-requires
const blocksToHtml = require('@sanity/block-content-to-html');

const client = sanityClient({
  projectId: '',
  dataset: '',
  apiVersion: '2021-05-11',
  token: String(process.env.SANITY_API_KEY),
  useCdn: false,
});

export async function getData(): Promise<void> {
  const query = '';
  const sanityResponse = await client.fetch(query);

  return;
}

I’m trying to mock this when I’m testing it, but I’m having issues setting up the mock. I keep getting TypeError: client_1.default is not a function. This is what I have in my Jest test file:

jest.mock('@sanity/client', () => {
  const mClient = {
    fetch: jest.fn(),
  };
  return { client: jest.fn(() => mClient) };
});

What am I doing wrong?

UPDATE:

made a __mocks__ folder with the following code and got a different error:

class sanityClient {}
const client = jest.fn(() => new sanityClient());

const fetchMock = jest.fn();

client.prototype = {
  fetch: fetchMock,
};

module.exports = sanityClient;
module.exports.client = client;
module.exports.fetch = fetchMock;

TypeError: client.fetch is not a function

Any help?


Solution

I got it to work: For anyone you need to mock the fetch as a function of sanity:

jest.mock('@sanity/client', () => {
  return function sanity() {
    return {
      fetch: () => ({
        methodOne: [{}],
        methodTwo: [{}],
      }),
    };
  };
});
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