[WIP] Make plugin compatible with tox v4

tests/fixtures.py

@@ -6,7 +6,7 @@ import poetry.factory
 import poetry.installation.pip_installer
 import poetry.utils.env
 import pytest
-import tox
+import tox.tox_env.python.virtual_env.runner
 from poetry.core.packages.package import Package as PoetryPackage
 
 from tox_poetry_installer import utilities
@@ -20,11 +20,8 @@ FAKE_VENV_PATH = Path("nowhere")
 class MockVirtualEnv:
     """Mock class for the :class:`poetry.utils.env.VirtualEnv` and :class:`tox.venv.VirtualEnv`"""
 
-    class MockTestenvConfig:  # pylint: disable=missing-class-docstring
-        envdir = FAKE_VENV_PATH
-
     def __init__(self, *args, **kwargs):
-        self.envconfig = self.MockTestenvConfig()
+        self.env_dir = FAKE_VENV_PATH
         self.installed = []
 
     @staticmethod
@@ -53,7 +50,9 @@ def mock_venv(monkeypatch):
     monkeypatch.setattr(
         poetry.installation.pip_installer, "PipInstaller", MockPipInstaller
     )
-    monkeypatch.setattr(tox.venv, "VirtualEnv", MockVirtualEnv)
+    monkeypatch.setattr(
+        tox.tox_env.python.virtual_env.runner, "VirtualEnvRunner", MockVirtualEnv
+    )
     monkeypatch.setattr(poetry.utils.env, "VirtualEnv", MockVirtualEnv)
 
 

tests/test_installer.py

@@ -3,7 +3,7 @@ import time
 from unittest import mock
 
 import pytest
-import tox.venv
+import tox.tox_env.python.virtual_env.runner
 from poetry.factory import Factory
 
 from .fixtures import mock_poetry_factory
@@ -19,7 +19,7 @@ def test_deduplication(mock_venv, mock_poetry_factory):
         item.name: item for item in poetry.locker.locked_repository().packages
     }
 
-    venv = tox.venv.VirtualEnv()
+    venv = tox.tox_env.python.virtual_env.runner.VirtualEnvRunner()
     to_install = [packages["toml"], packages["toml"]]
 
     installer.install(poetry, venv, to_install)
@@ -43,12 +43,12 @@ def test_parallelization(mock_venv, mock_poetry_factory):
         packages["attrs"],
     ]
 
-    venv_sequential = tox.venv.VirtualEnv()
+    venv_sequential = tox.tox_env.python.virtual_env.runner.VirtualEnvRunner()
     start_sequential = time.time()
     installer.install(poetry, venv_sequential, to_install, 0)
     sequential = time.time() - start_sequential
 
-    venv_parallel = tox.venv.VirtualEnv()
+    venv_parallel = tox.tox_env.python.virtual_env.runner.VirtualEnvRunner()
     start_parallel = time.time()
     installer.install(poetry, venv_parallel, to_install, 5)
     parallel = time.time() - start_parallel
@@ -76,7 +76,7 @@ def test_propagates_exceptions_during_installation(
         item.name: item for item in poetry.locker.locked_repository().packages
     }
     to_install = [packages["toml"]]
-    venv = tox.venv.VirtualEnv()
+    venv = tox.tox_env.python.virtual_env.runner.VirtualEnvRunner()
     fake_exception = ValueError("my testing exception")
 
     with mock.patch.object(