def test_divide_even():
sourcer = EventSourcer()
sourcer.add(6)
sourcer.divide(2)
assert sourcer.value == 3
def test_divide_big_divisor():
sourcer = EventSourcer()
sourcer.add(2)
sourcer.divide(3)
assert sourcer.value == 0
def test_divide_odd():
sourcer = EventSourcer()
sourcer.add(5)
sourcer.divide(2)
assert sourcer.value == 2