add new tests for these cases

tests/integration/test_update.py

@@ -1,5 +1,6 @@
 import pytest
 
+from pipenv.project import Project
 from pipenv.routines.update import get_modified_pipfile_entries
 
 
@@ -18,8 +19,8 @@ def test_update_outdated_with_outdated_package(pipenv_instance_private_pypi, cmd
         assert f"Package '{package_name}' out-of-date:" in c.stdout
 
 
-def test_get_modified_pipfile_entries_new_package(pipenv_instance_private_pypi):
-    with pipenv_instance_private_pypi() as p:
+def test_get_modified_pipfile_entries_new_package(pipenv_instance_pypi):
+    with pipenv_instance_pypi() as p:
         # Add package to Pipfile but don't lock
         p.pipenv("install requests==2.31.0")
         p.remove_lockfile()
@@ -32,13 +33,13 @@ def test_get_modified_pipfile_entries_new_package(pipenv_instance_private_pypi):
             '[packages]\nurllib3 = "==2.0.0"'
         )
         pipfile.write_text(content)
-
-        modified = get_modified_pipfile_entries(p.project, ["packages"])
+        project = Project()
+        modified = get_modified_pipfile_entries(project, ["packages"])
         assert "urllib3" in modified["default"]
 
 
-def test_get_modified_pipfile_entries_changed_version(pipenv_instance_private_pypi):
-    with pipenv_instance_private_pypi() as p:
+def test_get_modified_pipfile_entries_changed_version(pipenv_instance_pypi):
+    with pipenv_instance_pypi() as p:
         # Install and lock initial version
         p.pipenv("install requests==2.31.0")
 
@@ -50,13 +51,13 @@ def test_get_modified_pipfile_entries_changed_version(pipenv_instance_private_py
             'requests = "==2.32.0"'
         )
         pipfile.write_text(content)
-
-        modified = get_modified_pipfile_entries(p.project, ["packages"])
+        project = Project()
+        modified = get_modified_pipfile_entries(project, ["packages"])
         assert "requests" in modified["default"]
 
 
-def test_get_modified_pipfile_entries_vcs_changes(pipenv_instance_private_pypi):
-    with pipenv_instance_private_pypi() as p:
+def test_get_modified_pipfile_entries_vcs_changes(pipenv_instance_pypi):
+    with pipenv_instance_pypi() as p:
         # Install VCS package
         p.pipenv("install git+https://github.com/requests/requests.git@main#egg=requests")
 
@@ -68,13 +69,13 @@ def test_get_modified_pipfile_entries_vcs_changes(pipenv_instance_private_pypi):
             'ref = "master"'
         )
         pipfile.write_text(content)
-
-        modified = get_modified_pipfile_entries(p.project, ["packages"])
+        project = Project()
+        modified = get_modified_pipfile_entries(project, ["packages"])
         assert "requests" in modified["default"]
 
 
-def test_update_without_lockfile(pipenv_instance_private_pypi):
-    with pipenv_instance_private_pypi() as p:
+def test_update_without_lockfile(pipenv_instance_pypi):
+    with pipenv_instance_pypi() as p:
         # Install without creating lockfile
         p.pipenv("install --skip-lock requests==2.31.0")
         p.remove_lockfile()
@@ -104,15 +105,15 @@ def test_update_without_lockfile(pipenv_instance_private_pypi):
         )
     ]
 )
-def test_update_modified_packages(pipenv_instance_private_pypi, pipfile_content, expected_updates):
-    with pipenv_instance_private_pypi() as p:
+def test_update_modified_packages(pipenv_instance_pypi, pipfile_content, expected_updates):
+    with pipenv_instance_pypi() as p:
         # Setup initial state
         p.pipenv("install requests==2.31.0")
 
         # Modify Pipfile
         pipfile = p.path / "Pipfile"
         pipfile.write_text(pipfile_content)
-
+        project = Project()
         # Verify correct packages identified for update
-        modified = get_modified_pipfile_entries(p.project, ["packages", "dev-packages"])
+        modified = get_modified_pipfile_entries(project, ["packages", "dev-packages"])
         assert set(modified["default"]).union(set(modified["develop"])) == expected_updates