def test_not_transitive():
    assert not r.isTransitive([[1, 2], [3, 1]])
def test_curiel_transitive():
    assert r.isTransitive([[1, 2], [2, 3], [1, 3], [1, 5]])
def test_transitive_pair():
    assert r.isTransitive([[1, 2], [2, 2]])
def test_complete_transitive():
    assert r.isTransitive([[1, 2], [2, 3], [3, 4], [5, 4], [1, 3], [2, 4], [1, 4]])
def test_simple_transitive():
    assert r.isTransitive([[1, 2], [2, 3], [1, 3]])