explicitly detect conda envs - fixes #12652

changelog/12652.bugfix.rst

@@ -0,0 +1,3 @@
+Resolve regression `conda` environments where no longer being automatically detected.
+
+-- by :user:`RonnyPfannschmidt`

src/_pytest/main.py

@@ -370,9 +370,20 @@ def pytest_runtestloop(session: Session) -> bool:
 def _in_venv(path: Path) -> bool:
     """Attempt to detect if ``path`` is the root of a Virtual Environment by
     checking for the existence of the pyvenv.cfg file.
-    [https://peps.python.org/pep-0405/]"""
+
+    [https://peps.python.org/pep-0405/]
+
+    For regression protection we also check for conda environments that do not include pyenv.cfg yet --
+    https://github.com/conda/conda/issues/13337 is the conda issue tracking adding pyenv.cfg.
+
+    Checking for the `conda-meta/history` file per https://github.com/pytest-dev/pytest/issues/12652#issuecomment-2246336902.
+
+    """
     try:
-        return path.joinpath("pyvenv.cfg").is_file()
+        return (
+            path.joinpath("pyvenv.cfg").is_file()
+            or path.joinpath("conda-meta", "history").is_file()
+        )
     except OSError:
         return False
 

testing/test_collection.py

@@ -3,6 +3,7 @@
 
 import os
 from pathlib import Path
+from pathlib import PurePath
 import pprint
 import shutil
 import sys
@@ -152,8 +153,17 @@ def test_ignored_certain_directories(self, pytester: Pytester) -> None:
         assert "test_notfound" not in s
         assert "test_found" in s
 
-    def test_ignored_virtualenvs(self, pytester: Pytester) -> None:
-        ensure_file(pytester.path / "virtual" / "pyvenv.cfg")
+    known_environment_types = pytest.mark.parametrize(
+        "env_path",
+        [
+            pytest.param(PurePath("pyvenv.cfg"), id="venv"),
+            pytest.param(PurePath("conda-meta", "history"), id="conda"),
+        ],
+    )
+
+    @known_environment_types
+    def test_ignored_virtualenvs(self, pytester: Pytester, env_path: PurePath) -> None:
+        ensure_file(pytester.path / "virtual" / env_path)
         testfile = ensure_file(pytester.path / "virtual" / "test_invenv.py")
         testfile.write_text("def test_hello(): pass", encoding="utf-8")
 
@@ -167,11 +177,12 @@ def test_ignored_virtualenvs(self, pytester: Pytester) -> None:
         result = pytester.runpytest("virtual")
         assert "test_invenv" in result.stdout.str()
 
+    @known_environment_types
     def test_ignored_virtualenvs_norecursedirs_precedence(
-        self, pytester: Pytester
+        self, pytester: Pytester, env_path
     ) -> None:
         # norecursedirs takes priority
-        ensure_file(pytester.path / ".virtual" / "pyvenv.cfg")
+        ensure_file(pytester.path / ".virtual" / env_path)
         testfile = ensure_file(pytester.path / ".virtual" / "test_invenv.py")
         testfile.write_text("def test_hello(): pass", encoding="utf-8")
         result = pytester.runpytest("--collect-in-virtualenv")
@@ -180,13 +191,14 @@ def test_ignored_virtualenvs_norecursedirs_precedence(
         result = pytester.runpytest("--collect-in-virtualenv", ".virtual")
         assert "test_invenv" in result.stdout.str()
 
-    def test__in_venv(self, pytester: Pytester) -> None:
+    @known_environment_types
+    def test__in_venv(self, pytester: Pytester, env_path: PurePath) -> None:
         """Directly test the virtual env detection function"""
-        # no pyvenv.cfg, not a virtualenv
+        # no env path, not a env
         base_path = pytester.mkdir("venv")
         assert _in_venv(base_path) is False
-        # with pyvenv.cfg, totally a virtualenv
-        base_path.joinpath("pyvenv.cfg").touch()
+        # with env path, totally a env
+        ensure_file(base_path.joinpath(env_path))
         assert _in_venv(base_path) is True
 
     def test_custom_norecursedirs(self, pytester: Pytester) -> None: