🧪 test: run template tests without symlink privileges

pyproject.toml

@@ -83,6 +83,8 @@ lint.per-file-ignores."tests/**/*.py" = [
   "implicit-namespace-package",           # no implicit namespace
   "magic-value-comparison",               # Magic value used in comparison, consider replacing with a constant variable
   "subprocess-without-shell-equals-true", # `subprocess` call: check for execution of untrusted input
+  "too-many-arguments",                   # pytest injects fixtures and parameters as arguments
+  "too-many-positional-arguments",        # pytest injects fixtures and parameters as arguments
 ]
 lint.isort = { known-first-party = [
   "pytest_env",

tests/conftest.py

@@ -1,3 +1,15 @@
 from __future__ import annotations
 
+from pathlib import Path
+from typing import Final
+
+import pytest
+
 pytest_plugins = ["pytester"]
+
+
+@pytest.fixture
+def env_test_template() -> str:
+    template: Final[Path] = Path(__file__).with_name("template.py")
+    # Execute the original template so coverage still records its assertions.
+    return f"from runpy import run_path\n\ntest_env = run_path({str(template)!r})['test_env']\n"

tests/test_env.py

@@ -119,13 +119,14 @@
 )
 def test_env_via_pytest(
     pytester: pytest.Pytester,
+    env_test_template: str,
     env: dict[str, str],
     ini: str,
     expected_env: dict[str, str],
     request: pytest.FixtureRequest,
 ) -> None:
     test_name = re.sub(r"\W|^(?=\d)", "_", request.node.callspec.id).lower()
-    (pytester.path / f"test_{test_name}.py").symlink_to(Path(__file__).parent / "template.py")
+    (pytester.path / f"test_{test_name}.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pytest.ini").write_text(ini, encoding="utf-8")
 
     new_env = {
@@ -281,8 +282,9 @@ def test_env_via_pytest(
         ),
     ],
 )
-def test_env_via_toml(  # ruff:ignore[too-many-arguments, too-many-positional-arguments]
+def test_env_via_toml(
     pytester: pytest.Pytester,
+    env_test_template: str,
     env: dict[str, str],
     pyproject_toml: str,
     pytest_toml: str,
@@ -306,7 +308,7 @@ def test_env_via_toml(  # ruff:ignore[too-many-arguments, too-many-positional-ar
         if ini:
             (pytester.path / "pytest.ini").write_text(ini, encoding="utf-8")
 
-    (test_dir / f"test_{test_name}.py").symlink_to(Path(__file__).parent / "template.py")
+    (test_dir / f"test_{test_name}.py").write_text(env_test_template, encoding="utf-8")
 
     new_env = {
         **env,
@@ -478,8 +480,9 @@ def test_env_via_toml(  # ruff:ignore[too-many-arguments, too-many-positional-ar
         ),
     ],
 )
-def test_env_via_env_file(  # ruff:ignore[too-many-arguments, too-many-positional-arguments]
+def test_env_via_env_file(
     pytester: pytest.Pytester,
+    env_test_template: str,
     env: dict[str, str],
     env_file_content: str,
     config: str,
@@ -488,7 +491,7 @@ def test_env_via_env_file(  # ruff:ignore[too-many-arguments, too-many-positiona
     request: pytest.FixtureRequest,
 ) -> None:
     test_name = re.sub(r"\W|^(?=\d)", "_", request.node.callspec.id).lower()
-    (pytester.path / f"test_{test_name}.py").symlink_to(Path(__file__).parent / "template.py")
+    (pytester.path / f"test_{test_name}.py").write_text(env_test_template, encoding="utf-8")
     if env_file_content:
         (pytester.path / ".env").write_text(env_file_content, encoding="utf-8")
     config_file_names = {"pyproject": "pyproject.toml", "pytest.toml": "pytest.toml", "ini": "pytest.ini"}
@@ -623,15 +626,16 @@ def test_env_via_pyproject_toml_bad(pytester: pytest.Pytester, toml_name: str) -
         ),
     ],
 )
-def test_envfile_cli(  # ruff:ignore[too-many-arguments, too-many-positional-arguments]
+def test_envfile_cli(
     pytester: pytest.Pytester,
+    env_test_template: str,
     env_file_content: str | None,
     cli_file_content: str,
     config: str | None,
     cli_arg: str,
     expected_env: dict[str, str],
 ) -> None:
-    (pytester.path / "test_cli.py").symlink_to(Path(__file__).parent / "template.py")
+    (pytester.path / "test_cli.py").write_text(env_test_template, encoding="utf-8")
 
     if env_file_content:
         (pytester.path / ".env").write_text(env_file_content, encoding="utf-8")
@@ -651,8 +655,8 @@ def test_envfile_cli(  # ruff:ignore[too-many-arguments, too-many-positional-arg
     result.assert_outcomes(passed=1)
 
 
-def test_envfile_cli_skip_if_set(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_cli_skip.py").symlink_to(Path(__file__).parent / "template.py")
+def test_envfile_cli_skip_if_set(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_cli_skip.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "cli.env").write_text("MAGIC=from_cli", encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         dedent("""\

tests/test_verbose.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import os
-from pathlib import Path
 from textwrap import dedent
 from typing import TYPE_CHECKING
 from unittest import mock
@@ -10,8 +9,8 @@
     import pytest
 
 
-def test_verbose_shows_set_from_ini(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_set_from_ini(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pytest.ini").write_text("[pytest]\nenv = MAGIC=alpha", encoding="utf-8")
 
     new_env = {
@@ -26,8 +25,10 @@ def test_verbose_shows_set_from_ini(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*pytest-env:*", "*SET*MAGIC=alpha*(from*pytest.ini*"])
 
 
-def test_verbose_shows_ini_source_when_pyproject_lacks_pytest_env(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_ini_source_when_pyproject_lacks_pytest_env(
+    pytester: pytest.Pytester, env_test_template: str
+) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         dedent("""\
             [build-system]
@@ -50,8 +51,8 @@ def test_verbose_shows_ini_source_when_pyproject_lacks_pytest_env(pytester: pyte
     result.stdout.fnmatch_lines(["*SET*MAGIC=alpha*(from*pytest.ini*"])
 
 
-def test_verbose_shows_set_from_toml(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_set_from_toml(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         '[tool.pytest_env]\nMY_VAR = "hello"',
         encoding="utf-8",
@@ -69,8 +70,8 @@ def test_verbose_shows_set_from_toml(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*pytest-env:*", "*SET*MY_VAR=hello*(from*pyproject.toml*"])
 
 
-def test_verbose_shows_set_from_env_file(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_set_from_env_file(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / ".env").write_text("FROM_FILE=value", encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         '[tool.pytest_env]\nenv_files = [".env"]',
@@ -89,8 +90,8 @@ def test_verbose_shows_set_from_env_file(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*SET*FROM_FILE=value*(from*.env*"])
 
 
-def test_verbose_shows_skip_from_env_file(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_skip_from_env_file(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / ".env").write_text("FROM_FILE=value", encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         dedent("""\
@@ -114,8 +115,8 @@ def test_verbose_shows_skip_from_env_file(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*SKIP*FROM_FILE=original*(from*.env*"])
 
 
-def test_verbose_shows_skip(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_skip(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pytest.ini").write_text("[pytest]\nenv = D:EXISTING=new", encoding="utf-8")
 
     new_env = {
@@ -131,8 +132,8 @@ def test_verbose_shows_skip(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*SKIP*EXISTING=original*"])
 
 
-def test_verbose_shows_unset(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_unset(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pytest.ini").write_text("[pytest]\nenv = U:TO_REMOVE", encoding="utf-8")
 
     new_env = {
@@ -148,8 +149,8 @@ def test_verbose_shows_unset(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*UNSET*TO_REMOVE*"])
 
 
-def test_verbose_shows_transform(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_shows_transform(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         dedent("""\
             [tool.pytest_env]
@@ -171,8 +172,8 @@ def test_verbose_shows_transform(pytester: pytest.Pytester) -> None:
     result.stdout.fnmatch_lines(["*SET*GREETING=hello_world*"])
 
 
-def test_no_verbose_output_without_flag(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_no_verbose_output_without_flag(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / "pytest.ini").write_text("[pytest]\nenv = MAGIC=alpha", encoding="utf-8")
 
     new_env = {
@@ -187,8 +188,8 @@ def test_no_verbose_output_without_flag(pytester: pytest.Pytester) -> None:
     result.stdout.no_fnmatch_line("*pytest-env:*")
 
 
-def test_verbose_multiple_sources(pytester: pytest.Pytester) -> None:
-    (pytester.path / "test_it.py").symlink_to(Path(__file__).parent / "template.py")
+def test_verbose_multiple_sources(pytester: pytest.Pytester, env_test_template: str) -> None:
+    (pytester.path / "test_it.py").write_text(env_test_template, encoding="utf-8")
     (pytester.path / ".env").write_text("FROM_FILE=file_val", encoding="utf-8")
     (pytester.path / "pyproject.toml").write_text(
         dedent("""\