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How to use venv_filter_project method in tox

Best Python code snippet using tox_python

test_session.py

Source:test_session.py

...83    )84    result = cmd("--notest")85    result.assert_success()86@pytest.fixture()87def venv_filter_project(initproj, cmd):88    def func(*args):89        initproj(90            "pkg123-0.7",91            filedefs={92                "tox.ini": """93                    [tox]94                    envlist = {py27,py36}-{nocov,cov,diffcov}{,-extra}95                    skipsdist = true96                    [testenv]97                    skip_install = true98                    commands = python -c 'print("{envname}")'99                """,100            },101        )102        result = cmd(*args)103        result.assert_success(is_run_test_env=False)104        active = [i.name for i in result.session.existing_venvs.values()]105        return active, result106    yield func107def test_venv_filter_empty_all_active(venv_filter_project, monkeypatch):108    monkeypatch.delenv("TOX_SKIP_ENV", raising=False)109    active, result = venv_filter_project("-a")110    assert result.outlines == [111        "py27-nocov",112        "py27-nocov-extra",113        "py27-cov",114        "py27-cov-extra",115        "py27-diffcov",116        "py27-diffcov-extra",117        "py36-nocov",118        "py36-nocov-extra",119        "py36-cov",120        "py36-cov-extra",121        "py36-diffcov",122        "py36-diffcov-extra",123    ]124    assert active == result.outlines125def test_venv_filter_match_all_none_active(venv_filter_project, monkeypatch):126    monkeypatch.setenv("TOX_SKIP_ENV", ".*")127    active, result = venv_filter_project("-a")128    assert not active129    existing_envs = result.outlines130    _, result = venv_filter_project("-avv")131    for name in existing_envs:132        msg = "skip environment {}, matches filter '.*'".format(name)133        assert msg in result.outlines134def test_venv_filter_match_some_some_active(venv_filter_project, monkeypatch):135    monkeypatch.setenv("TOX_SKIP_ENV", "py27.*")136    active, result = venv_filter_project("-avvv")137    assert active == [138        "py36-nocov",139        "py36-nocov-extra",140        "py36-cov",141        "py36-cov-extra",142        "py36-diffcov",143        "py36-diffcov-extra",144    ]145@pytest.fixture()146def popen_env_test(initproj, cmd, monkeypatch):147    def func(tox_env, isolated_build):148        files = {149            "tox.ini": """150               [tox]...

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