fix(webui): package-qualify webui_testclient import across test suite (Closes #682)

tests/test_issue_682_starlette_httpx2.py

@@ -9,7 +9,6 @@ import warnings
 from pathlib import Path
 
 sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
-sys.path.insert(0, str(Path(__file__).resolve().parent))
 
 
 class TestHttpx2Installed(unittest.TestCase):
@@ -21,32 +20,39 @@ class TestHttpx2Installed(unittest.TestCase):
 class TestNoStarletteTestClientDeprecation(unittest.TestCase):
     def test_starlette_testclient_import_does_not_warn(self) -> None:
         # Force a fresh import path so a previous httpx-fallback warning cannot
-        # hide a regression after httpx2 is present.
-        for name in list(sys.modules):
-            if name == "starlette.testclient" or name.startswith("starlette.testclient."):
+        # hide a regression after httpx2 is present. Restore sys.modules afterwards.
+        saved = {
+            name: sys.modules[name]
+            for name in list(sys.modules)
+            if name == "starlette.testclient" or name.startswith("starlette.testclient.")
+        }
+        try:
+            for name in list(saved):
                 del sys.modules[name]
 
-        with warnings.catch_warnings(record=True) as caught:
-            warnings.simplefilter("always")
-            import starlette.testclient as testclient  # noqa: F401
+            with warnings.catch_warnings(record=True) as caught:
+                warnings.simplefilter("always")
+                import starlette.testclient as testclient  # noqa: F401
 
-        dep = [
-            w
-            for w in caught
-            if "httpx" in str(w.message).lower()
-            and "deprecated" in str(w.message).lower()
-        ]
-        self.assertEqual(
-            dep,
-            [],
-            f"expected no Starlette httpx deprecation warning; got: "
-            f"{[str(w.message) for w in dep]}",
-        )
+            dep = [
+                w
+                for w in caught
+                if "httpx" in str(w.message).lower()
+                and "deprecated" in str(w.message).lower()
+            ]
+            self.assertEqual(
+                dep,
+                [],
+                f"expected no Starlette httpx deprecation warning; got: "
+                f"{[str(w.message) for w in dep]}",
+            )
+        finally:
+            sys.modules.update(saved)
 
     def test_canonical_webui_testclient_import(self) -> None:
         with warnings.catch_warnings(record=True) as caught:
             warnings.simplefilter("always")
-            from webui_testclient import TestClient
+            from tests.webui_testclient import TestClient
             from webui.app import create_app
 
             client = TestClient(create_app())