Add pytest fixtures to get the path to a test sdist and test wheel

To avoid creating these over and over again, create the sdist and
wheel in a temporary direcory with lifetime related to the test
session scope.

Author: dnicolodi

tests/conftest.py

@@ -1,5 +1,7 @@
 import getpass
 import logging.config
+import pathlib
+import tempfile
 import textwrap
 
 import pytest
@@ -8,6 +10,9 @@
 from twine import settings
 from twine import utils
 
+from .helpers import build_sdist
+from .helpers import build_wheel
+
 
 @pytest.fixture(autouse=True)
 def configure_output():
@@ -83,3 +88,31 @@ def _settings(config=default_config, **settings_kwargs):
 @pytest.fixture
 def entered_password(monkeypatch):
     monkeypatch.setattr(getpass, "getpass", lambda prompt: "entered pw")
+
+
+@pytest.fixture(scope="session")
+def tmp_path_session(tmp_path_factory):
+    return pathlib.Path(
+        tempfile.mkdtemp(
+            prefix="twine-test-",
+            dir=tmp_path_factory.mktemp("test"),
+        )
+    )
+
+
+@pytest.fixture
+def test_wheel(tmp_path_session):
+    return build_wheel(tmp_path_session, "test", "1.2.3", {})
+
+
+@pytest.fixture
+def test_wheel_signature(test_wheel):
+    signature = test_wheel.with_suffix(".whl.asc")
+    signature.write_text("-----BEGIN PGP SIGNATURE-----")
+    yield signature
+    signature.unlink()
+
+
+@pytest.fixture
+def test_sdist(tmp_path_session):
+    return build_sdist(tmp_path_session, "test", "1.2.3", {})

tests/test_package.py

@@ -116,8 +116,8 @@ def test_package_signed_name_is_correct():
     assert package.signed_filename == (filename + ".asc")
 
 
-def test_package_add_attestations(tmp_path):
-    package = package_file.PackageFile.from_filename(helpers.WHEEL_FIXTURE, None)
+def test_package_add_attestations(tmp_path, test_wheel):
+    package = package_file.PackageFile.from_filename(test_wheel, None)
 
     assert package.attestations is None