Final answer:
To increase the test time out value in Jest, you can either specify a timeout for individual tests using the third argument of test functions or set a global timeout using the 'testTimeout' configuration option in Jest configuration files.
Step-by-step explanation:
To increase the test time out value in Jest, you can use either the test-specific timeout feature or adjust the global timeout setting. For individual tests, you can pass the timeout value as the third argument to test(name, fn, timeout) or it(name, fn, timeout). For instance, test('my long running test', async () => {/* test code */}, 30000); sets the timeout for that particular test to 30 seconds.
To change the timeout for all tests, you can set the testTimeout configuration option in your Jest configuration file. This can be done either in the jest.config.js file or within the package.json under the "jest" key like so: {"testTimeout": 30000}. The value is specified in milliseconds, so 30000 would increase the global timeout to 30 seconds for all tests.