Reactivate ruff for test folder

pyproject.toml

@@ -98,7 +98,7 @@ ignore_missing_imports = true
 precision = 2
 
 [tool.ruff]
-exclude = ["examples", "test", "docs_sphinx"]
+exclude = ["examples", "docs_sphinx"]
 
 [tool.ruff.lint]
 select = ["E4", "E7", "E9", "F", "SIM", "B", "NPY", "C4", "UP", "RUF", "A", "I"]

test/conftest.py

 import os
 from distutils import dir_util
+
+import pytest
+
 from test.fixtures.operation_tree import *
 from test.fixtures.port import *
 from test.fixtures.resources import *
@@ -7,8 +10,6 @@ from test.fixtures.schedule import *
 from test.fixtures.signal import signal, signals  # noqa: F401
 from test.fixtures.signal_flow_graph import *
 
-import pytest
-
 
 @pytest.fixture
 def datadir(tmpdir, request):