Method _checkFakeTimers

packages/jest-fake-timers/src/modernFakeTimers.ts:200–216

()

  }

  private _checkFakeTimers() {
    if (!this._fakingTime) {
      this._global.console.warn(
        'A function to advance timers was called but the timers APIs are not replaced ' +
          'with fake timers. Call `jest.useFakeTimers()` in this test file or enable ' +
          "fake timers for all tests by setting 'fakeTimers': {'enableGlobally': true} " +
          `in Jest configuration file.\nStack Trace:\n${formatStackTrace(
            // eslint-disable-next-line unicorn/error-message
            new Error().stack!,
            this._config,
            {noStackTrace: false},
          )}`,
      );
    }

    return this._fakingTime;
  }

  private _toSinonFakeTimersConfig(
    fakeTimersConfig: Config.FakeTimersConfig = {},