test: add test for url with trailing slash (#7952)

tests/repositories/test_legacy_repository.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 import base64
 import re
 import shutil
-import urllib.parse as urlparse
 
 from pathlib import Path
 from typing import TYPE_CHECKING
@@ -14,6 +13,7 @@ import requests
 from packaging.utils import canonicalize_name
 from poetry.core.constraints.version import Version
 from poetry.core.packages.dependency import Dependency
+from poetry.core.packages.utils.link import Link
 
 from poetry.factory import Factory
 from poetry.repositories.exceptions import PackageNotFound
@@ -51,7 +51,7 @@ class MockRepository(LegacyRepository):
             return SimpleRepositoryPage(self._url + f"/{name}/", f.read())
 
     def _download(self, url: str, dest: Path) -> None:
-        filename = urlparse.urlparse(url).path.rsplit("/")[-1]
+        filename = Link(url).filename
         filepath = self.FIXTURES.parent / "pypi.org" / "dists" / filename
 
         shutil.copyfile(str(filepath), dest)
@@ -462,6 +462,14 @@ def test_find_links_for_package_yanked(
         assert link.yanked_reason == yanked_reason
 
 
+def test_cached_or_downloaded_file_supports_trailing_slash() -> None:
+    repo = MockRepository()
+    with repo._cached_or_downloaded_file(
+        Link("https://foo.bar/pytest-3.5.0-py2.py3-none-any.whl/")
+    ) as filepath:
+        assert filepath.name == "pytest-3.5.0-py2.py3-none-any.whl"
+
+
 class MockHttpRepository(LegacyRepository):
     def __init__(
         self, endpoint_responses: dict[str, int], http: type[httpretty.httpretty]