it("resetAllLanes is safe when no lanes have been created", () => {

expect(getActiveTaskCount()).toBe(0);

expect(() => resetAllLanes()).not.toThrow();

resetAllLanes();

expect(getActiveTaskCount()).toBe(0);

});

// resetAllLanes calls notifyActiveTaskWaiters → Array.from(state.activeTaskWaiters).

// Without the migration this would throw:

// TypeError: undefined is not iterable

expect(() => resetAllLanes()).not.toThrow();

resetAllLanes();

// waitForActiveTasks also accesses activeTaskWaiters.

await expect(waitForActiveTasks(0)).resolves.toEqual({ drained: true });