jest/no-deprecated-functions

Jest has renamed or moved some of its functions. The old names keep working for a while and then get removed, so a test that uses one breaks on a later upgrade.

--fix writes the new name.

Configure

Off by default. To turn it on:

[lint.rules]
"jest/no-deprecated-functions" = "error" # or "warn"

Examples

Reported:

import { jest } from "@jest/globals";

jest.useFakeTimers();
jest.runTimersToTime(1000);

const api = jest.genMockFromModule("./api");

Not reported:

import { jest } from "@jest/globals";

jest.useFakeTimers();
jest.advanceTimersByTime(1000);

const api = jest.createMockFromModule("./api");

The full list:

Reported	From Jest	Write instead
jest.resetModuleRegistry	15	jest.resetModules
jest.addMatchers	17	expect.extend
require.requireMock	21	jest.requireMock
require.requireActual	21	jest.requireActual
jest.runTimersToTime	22	jest.advanceTimersByTime
jest.genMockFromModule	26	jest.createMockFromModule

Options

Option	Default	What it does
jest.version	"29"	Your Jest version, as a string. A function is only reported starting from the version in the table above.

[lint.rules]
"jest/no-deprecated-functions" = ["error", { jest = { version = "25.1.0" } }]

jest.genMockFromModule is still the current name in Jest 25:

import { jest } from "@jest/globals";

const api = jest.genMockFromModule("./api");

If you set settings.jest.version ([lint.settings.jest] in bunfig.toml, or settings in an ESLint or oxlint config), that version is used instead of the option.