Message "Async callback was not invoked within the 5000 ms timeout specified by jest.setTimeout"

Increasing global patience: jest.config.js

Consider setting a testTimeout at the jest.config.js level, making it as universal as gravity:

module.exports = {
  // ...
  testTimeout: 30000, // Waiting, Waiting and Waiting- for 30 sec...
};


This extension spans all tests, shelving the need to tweak timeouts individually.

Async/await: Modern age genie

Ditch done(), go for async/await. It handles async operations in Jest more efficiently, the 'done' is implied:

test('async test with async/await', async () => {
  const data = await fetchData(); // Fetching data as if it's morning coffee
  expect(data).toBeDefined();
});


Async/await streamlines the flow, rendering it more readable. Jest knows to wait for the promise. It's as if you're telling Jest, "Hold my beer while I finish this."

Sniper strategies to handle Jest timeouts

Here, a triple treat of strategies to wield directly within your Jest tests for managing timeouts:

Establishing a standard timeout

Put in place a master timeout for all tests via a common configuration file like setupFilesAfterEnv:

// jest.setup.js
jest.setTimeout(30000); // Each test has 30 sec to live

// jest.config.js
module.exports = {
  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  // ...
};


Power-up the asynchronous operations

Before expanding the timeout, how about giving your async code a boost? Could involve revising the code, mocking bulky dependencies, or caching asynchronous operations.

Dig deeper, fix better

Timeouts can be hardware issues. Look into potential causes like poor network connectivity, inefficient database queries, or promises that forgot to resolve.