import pytest
import main 


@pytest.fixture(autouse=True)
def patch_log(monkeypatch):
    monkeypatch.setattr(main, "log", lambda msg: None)
    monkeypatch.setattr(main, "logvv", lambda msg: None)

def test_shifting_top():

    assert main.shifting((2,3), (4,5)) == (2,4)

def test_shifting_mid():

    assert main.shifting((20,24), (21,49)) == (20,23)

def test_shifting_botom():

    assert main.shifting((20,26), (21,49)) == (20,27)