If 2 fixtures without parameters are used in a fixture union, their setup/teardown should be done in sequence too

[smarie]

No description provided.

[smarie]

... and only once !

from pytest_cases import pytest_fixture_plus, fixture_union

state = -1

@pytest_fixture_plus
def a():
    global state
    state = 0
    yield
    state = 1

@pytest_fixture_plus
def b():
    global state
    state = 2
    yield
    state = 3

c = fixture_union('c', [b, a])

def test_all(c):
    pass

def test_synthesis():
    assert state == 3

[smarie]

This was an issue with @pytest_fixture_plus not correctly handling the NOT_USED parameter, that is actually added in the list so each fixture is called twice.