fix: address final review findings for service clients plan

Fixes 9 numbered findings + 7 minor fixes from the whole-plan review of
the MyWhoosh/Garmin service clients (Plan 3):

Garmin uploader (app/garmin/uploader.py):
- Detect Garmin-rejected imports (failures without successes) and raise
  new GarminImportRejected instead of reporting them as successful.
- Reclassify 429/rate-limit/500 login failures as transient instead of
  falling through to permanent auth errors; unrecognized login failures
  are now treated as transient (retryable) rather than GarminAuthError.
- Mirror the auth-token check from the login branch into the import
  branch so 401-at-import-time raises GarminAuthError instead of
  propagating raw.
- Add common GarminError base class, hoist transient-token tuple to a
  shared module constant, check response.status_code==409 before the
  duplicate substring fallback, and create the tokenstore dir 0o700.

MyWhoosh client (app/mywhoosh/client.py):
- Add optional max_pages bound to list_activities pagination.
- Add aclose()/__aenter__/__aexit__ so the client's own httpx.AsyncClient
  gets closed, while never closing an injected client.
- Guard the two remaining unguarded JSON-decode paths (login body,
  download-fit metadata) so malformed bodies raise
  MyWhooshIntegrationError instead of raw ValueError/AttributeError.
- Row-level malformation (missing id/activityFileId, unparseable
  startDatetime) is now skipped rather than aborting the whole page;
  envelope-shape failures still raise. id/activityFileId checks use
  explicit None/"" comparisons instead of Python falsiness.
- Replace asserts in _authenticated_post with explicit exceptions;
  restrict the reauth retry to 401 only, treat 403 as immediately
  terminal; naive startDatetime values are now treated as already-UTC
  instead of host-local.

MyWhoosh tokenstore (app/mywhoosh/tokenstore.py):
- load() now treats any corrupt/malformed token file (bad JSON, missing
  keys, OS errors) as "absent" instead of raising, so a bad cache no
  longer permanently wedges a user.

pyproject.toml:
- Tighten garminconnect pin to >=0.3.10,<1 (import_activity requires
  0.3.10+).

Adds/updates tests across tests/mywhoosh/ and tests/garmin/ covering
all of the above, including a fake client that wraps GarminUploadBlocked
in a plain RuntimeError to mirror the real garminconnect library's MFA
error wrapping.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/garmin/uploader.py

@@ -18,18 +18,40 @@ class UploadResult:
     raw_response: Any
 
 
-class GarminUploadBlocked(RuntimeError):
+class GarminError(RuntimeError):
     pass
 
 
-class GarminAuthError(RuntimeError):
+class GarminUploadBlocked(GarminError):
     pass
 
 
-class GarminTransientError(RuntimeError):
+class GarminAuthError(GarminError):
     pass
 
 
+class GarminTransientError(GarminError):
+    pass
+
+
+class GarminImportRejected(GarminError):
+    pass
+
+
+_TRANSIENT_ERROR_TOKENS = (
+    "timeout",
+    "temporar",
+    "connection",
+    "429",
+    "too many",
+    "rate limit",
+    "500",
+    "502",
+    "503",
+    "504",
+)
+
+
 class GarminUploader:
     def __init__(
         self,
@@ -56,9 +78,12 @@ class GarminUploader:
                 if _looks_duplicate_error(exc):
                     return UploadResult("duplicate", True, None, str(exc))
                 text = str(exc).lower()
-                if any(token in text for token in ("timeout", "temporar", "connection", "502", "503", "504")):
+                if any(token in text for token in _TRANSIENT_ERROR_TOKENS):
                     raise GarminTransientError("Garmin import failed transiently") from exc
+                if any(token in text for token in ("password", "credential", "unauthorized", "401")):
+                    raise GarminAuthError("Garmin import failed: authentication rejected") from exc
                 raise
+            _raise_if_import_rejected(response)
             return UploadResult("imported", False, _extract_activity_id(response), response)
         finally:
             self._mfa_code = None
@@ -66,7 +91,7 @@ class GarminUploader:
     def _ensure_client(self) -> GarminClientProtocol:
         if self._client is not None:
             return self._client
-        self.tokenstore.mkdir(parents=True, exist_ok=True)
+        self.tokenstore.mkdir(parents=True, exist_ok=True, mode=0o700)
         factory = self.client_factory or _default_garmin_factory
         client = factory(self.email, self.password, prompt_mfa=self._prompt_mfa)
         try:
@@ -79,9 +104,9 @@ class GarminUploader:
                 raise GarminUploadBlocked("Garmin MFA is required") from exc
             if any(token in text for token in ("password", "credential", "unauthorized", "401")):
                 raise GarminAuthError("Garmin authentication failed") from exc
-            if any(token in text for token in ("timeout", "temporar", "connection", "502", "503", "504")):
+            if any(token in text for token in _TRANSIENT_ERROR_TOKENS):
                 raise GarminTransientError("Garmin login failed transiently") from exc
-            raise GarminAuthError("Garmin login failed") from exc
+            raise GarminTransientError("Garmin login failed") from exc
         self._client = client
         return client
 
@@ -98,10 +123,25 @@ def _default_garmin_factory(*args: Any, **kwargs: Any) -> GarminClientProtocol:
 
 
 def _looks_duplicate_error(exc: Exception) -> bool:
+    status_code = getattr(getattr(exc, "response", None), "status_code", None)
+    if status_code == 409:
+        return True
     text = str(exc).lower()
     return any(token in text for token in ("duplicate", "already exists", "409"))
 
 
+def _raise_if_import_rejected(response: Any) -> None:
+    if not isinstance(response, dict):
+        return
+    detailed = response.get("detailedImportResult")
+    if not isinstance(detailed, dict):
+        return
+    failures = detailed.get("failures")
+    successes = detailed.get("successes")
+    if isinstance(failures, list) and failures and not successes:
+        raise GarminImportRejected(f"Garmin rejected the import ({len(failures)} failure(s))")
+
+
 def _extract_activity_id(response: Any) -> str | None:
     if not isinstance(response, dict):
         return None

app/mywhoosh/client.py

@@ -31,9 +31,20 @@ class MyWhooshIntegrationError(MyWhooshError):
 class MyWhooshClient:
     def __init__(self, token_store: MyWhooshTokenStore, http_client: httpx.AsyncClient | None = None) -> None:
         self.token_store = token_store
+        self._owns_http = http_client is None
         self.http = http_client or httpx.AsyncClient(timeout=30.0)
         self.token = token_store.load()
 
+    async def aclose(self) -> None:
+        if self._owns_http:
+            await self.http.aclose()
+
+    async def __aenter__(self) -> "MyWhooshClient":
+        return self
+
+    async def __aexit__(self, *exc_info: object) -> None:
+        await self.aclose()
+
     async def login(self, email: str, password: str) -> None:
         payload = {
             "Username": email,
@@ -56,6 +67,8 @@ class MyWhooshClient:
             body = response.json()
         except ValueError as exc:
             raise MyWhooshIntegrationError("MyWhoosh login returned invalid JSON") from exc
+        if not isinstance(body, dict):
+            raise MyWhooshIntegrationError("MyWhoosh login response is not a JSON object")
         if body.get("Success") is not True or not body.get("AccessToken"):
             raise MyWhooshAuthError(str(body.get("Message") or "MyWhoosh login failed"))
         self.token = MyWhooshToken(
@@ -72,7 +85,8 @@ class MyWhooshClient:
     async def _authenticated_post(self, url: str, payload: dict, email: str, password: str) -> httpx.Response:
         await self.ensure_authenticated(email, password)
         for attempt in range(2):
-            assert self.token is not None
+            if self.token is None:
+                raise MyWhooshIntegrationError("no token after ensure_authenticated")
             try:
                 response = await self.http.post(
                     url,
@@ -81,7 +95,9 @@ class MyWhooshClient:
                 )
             except httpx.TransportError as exc:
                 raise MyWhooshTransientError("MyWhoosh request failed") from exc
-            if response.status_code not in {401, 403}:
+            if response.status_code == 403:
+                raise MyWhooshAuthError(f"MyWhoosh returned HTTP {response.status_code}")
+            if response.status_code != 401:
                 if response.status_code >= 500:
                     raise MyWhooshTransientError(f"MyWhoosh returned HTTP {response.status_code}")
                 return response
@@ -91,13 +107,15 @@ class MyWhooshClient:
                 await self.login(email, password)
                 continue
             raise MyWhooshAuthError("MyWhoosh session rejected after reauthentication")
-        raise AssertionError("unreachable")
+        raise MyWhooshIntegrationError("unreachable state in _authenticated_post")
 
-    async def list_activities(self, email: str, password: str) -> list[MyWhooshActivity]:
+    async def list_activities(
+        self, email: str, password: str, max_pages: int | None = None
+    ) -> list[MyWhooshActivity]:
         activities: list[MyWhooshActivity] = []
         page = 1
         total_pages = 1
-        while page <= total_pages:
+        while page <= total_pages and (max_pages is None or page <= max_pages):
             response = await self._authenticated_post(
                 ACTIVITIES_BASE + "rider/profile/activities",
                 {"sortDate": "DESC", "page": page},
@@ -119,26 +137,30 @@ class MyWhooshClient:
             if not isinstance(results, list):
                 raise MyWhooshIntegrationError("MyWhoosh activities response has unexpected shape")
             for row in results:
-                activities.append(self._normalize_activity(row))
+                activity = self._normalize_activity(row)
+                if activity is not None:
+                    activities.append(activity)
             page += 1
         return activities
 
-    def _normalize_activity(self, row: object) -> MyWhooshActivity:
+    def _normalize_activity(self, row: object) -> MyWhooshActivity | None:
         if not isinstance(row, dict):
             raise MyWhooshIntegrationError("MyWhoosh activity row is not an object")
         activity_id = row.get("id")
         activity_file_id = row.get("activityFileId")
-        if not activity_id or not activity_file_id:
-            raise MyWhooshIntegrationError("MyWhoosh activity row missing stable id or activityFileId")
+        if activity_id is None or activity_id == "" or activity_file_id is None or activity_file_id == "":
+            return None
         raw_started = row.get("startDatetime")
         started_at: datetime | None = None
         if raw_started:
             try:
-                started_at = datetime.fromisoformat(str(raw_started).replace("Z", "+00:00")).astimezone(
-                    timezone.utc
-                )
-            except ValueError as exc:
-                raise MyWhooshIntegrationError("MyWhoosh activity row has invalid startDatetime") from exc
+                parsed = datetime.fromisoformat(str(raw_started).replace("Z", "+00:00"))
+            except ValueError:
+                return None
+            if parsed.tzinfo is None:
+                started_at = parsed.replace(tzinfo=timezone.utc)
+            else:
+                started_at = parsed.astimezone(timezone.utc)
         return MyWhooshActivity(
             id=str(activity_id),
             title=str(row.get("title") or ""),
@@ -155,7 +177,13 @@ class MyWhooshClient:
         )
         if response.status_code >= 400:
             raise MyWhooshIntegrationError(f"download metadata returned HTTP {response.status_code}")
-        url = response.json().get("data")
+        try:
+            body = response.json()
+        except ValueError as exc:
+            raise MyWhooshIntegrationError("MyWhoosh download response returned invalid JSON") from exc
+        if not isinstance(body, dict):
+            raise MyWhooshIntegrationError("MyWhoosh download response is not a JSON object")
+        url = body.get("data")
         if not isinstance(url, str) or not url:
             raise MyWhooshIntegrationError("MyWhoosh download response has no URL")
         try:

app/mywhoosh/tokenstore.py

@@ -12,13 +12,13 @@ class MyWhooshTokenStore:
     def load(self) -> MyWhooshToken | None:
         try:
             raw = json.loads(self.path.read_text("utf-8"))
-        except FileNotFoundError:
-            return None
             return MyWhooshToken(
                 access_token=raw["access_token"],
                 refresh_token=raw.get("refresh_token"),
                 whoosh_id=raw.get("whoosh_id"),
             )
+        except (FileNotFoundError, OSError, ValueError, KeyError, TypeError):
+            return None
 
     def save(self, token: MyWhooshToken) -> None:
         self.path.parent.mkdir(parents=True, exist_ok=True, mode=0o700)

pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
   "python-multipart>=0.0.9,<1",
   "itsdangerous>=2.1,<3",
   "httpx>=0.27,<1",
-  "garminconnect>=0.2,<1",
+  "garminconnect>=0.3.10,<1",
 ]
 
 [project.optional-dependencies]

tests/garmin/test_uploader.py

@@ -2,7 +2,13 @@ from pathlib import Path
 
 import pytest
 
-from app.garmin.uploader import GarminUploadBlocked, GarminUploader
+from app.garmin.uploader import (
+    GarminAuthError,
+    GarminImportRejected,
+    GarminTransientError,
+    GarminUploadBlocked,
+    GarminUploader,
+)
 
 
 class FakeGarmin:
@@ -78,3 +84,93 @@ def test_mfa_code_is_returned_only_to_prompt(tmp_path: Path) -> None:
     )
     uploader.import_fit(tmp_path / "ride.fit", mfa_code="123456")
     assert seen == ["123456"]
+
+
+def test_import_rejected_by_garmin_raises_garmin_import_rejected(tmp_path: Path) -> None:
+    rejected_response = {
+        "detailedImportResult": {
+            "successes": [],
+            "failures": [{"internalId": 1, "messages": ["Invalid FIT file"]}],
+        }
+    }
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=lambda *a, **kw: FakeGarmin(*a, **kw, import_result=rejected_response),
+    )
+    with pytest.raises(GarminImportRejected):
+        uploader.import_fit(tmp_path / "ride.fit")
+
+
+def test_login_failure_with_429_is_transient(tmp_path: Path) -> None:
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=lambda *a, **kw: FakeGarmin(*a, **kw, login_error=RuntimeError("429 too many requests")),
+    )
+    with pytest.raises(GarminTransientError):
+        uploader.import_fit(tmp_path / "ride.fit")
+
+
+def test_login_failure_with_timeout_is_transient(tmp_path: Path) -> None:
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=lambda *a, **kw: FakeGarmin(*a, **kw, login_error=RuntimeError("connection timeout")),
+    )
+    with pytest.raises(GarminTransientError):
+        uploader.import_fit(tmp_path / "ride.fit")
+
+
+def test_login_failure_with_credential_message_is_auth_error(tmp_path: Path) -> None:
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=lambda *a, **kw: FakeGarmin(*a, **kw, login_error=RuntimeError("invalid credential")),
+    )
+    with pytest.raises(GarminAuthError):
+        uploader.import_fit(tmp_path / "ride.fit")
+
+
+def test_login_failure_unrecognized_is_transient(tmp_path: Path) -> None:
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=lambda *a, **kw: FakeGarmin(*a, **kw, login_error=RuntimeError("something odd happened")),
+    )
+    with pytest.raises(GarminTransientError):
+        uploader.import_fit(tmp_path / "ride.fit")
+
+
+def test_import_time_401_raises_auth_error(tmp_path: Path) -> None:
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=lambda *a, **kw: FakeGarmin(*a, **kw, import_error=RuntimeError("401 unauthorized")),
+    )
+    with pytest.raises(GarminAuthError):
+        uploader.import_fit(tmp_path / "ride.fit")
+
+
+def test_mfa_wrapped_in_generic_exception_still_blocks(tmp_path: Path) -> None:
+    class WrappedMfaGarmin(FakeGarmin):
+        def login(self, tokenstore=None):
+            try:
+                self.prompt_mfa()
+            except GarminUploadBlocked as exc:
+                raise RuntimeError(f"Login failed: Garmin requested MFA ({exc})") from exc
+
+    uploader = GarminUploader(
+        email="g@example.com",
+        password="pw",
+        tokenstore=tmp_path / "garmin",
+        client_factory=WrappedMfaGarmin,
+    )
+    with pytest.raises(GarminUploadBlocked):
+        uploader.import_fit(tmp_path / "ride.fit")

tests/mywhoosh/test_client_activities.py

@@ -134,7 +134,7 @@ async def test_download_fit_fetches_signed_url_bytes(tmp_path) -> None:
 
 
 @pytest.mark.asyncio
-async def test_list_activities_raises_integration_error_on_missing_stable_id(tmp_path) -> None:
+async def test_list_activities_skips_row_missing_stable_id(tmp_path) -> None:
     async def handler(request: httpx.Request) -> httpx.Response:
         if request.url.path.endswith("/activities"):
             return httpx.Response(
@@ -147,7 +147,13 @@ async def test_list_activities_raises_integration_error_on_missing_stable_id(tmp
                                 "title": "Ride without id",
                                 "activityFileId": "f-1",
                                 "startDatetime": "2026-08-15T06:00:00.000Z",
-                            }
+                            },
+                            {
+                                "id": "a-2",
+                                "title": "Ride with id",
+                                "activityFileId": "f-2",
+                                "startDatetime": "2026-08-15T06:00:00.000Z",
+                            },
                         ],
                     }
                 },
@@ -158,5 +164,108 @@ async def test_list_activities_raises_integration_error_on_missing_stable_id(tmp
     store.save(MyWhooshToken(access_token="cached", refresh_token=None, whoosh_id=None))
     client = MyWhooshClient(store, http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)))
 
+    activities = await client.list_activities("rider@example.com", "secret")
+
+    assert [a.id for a in activities] == ["a-2"]
+
+
+@pytest.mark.asyncio
+async def test_list_activities_skips_row_with_unparseable_start_datetime(tmp_path) -> None:
+    async def handler(request: httpx.Request) -> httpx.Response:
+        if request.url.path.endswith("/activities"):
+            return httpx.Response(
+                200,
+                json={
+                    "data": {
+                        "totalPages": 1,
+                        "results": [
+                            {
+                                "id": "a-1",
+                                "title": "Ride with bad date",
+                                "activityFileId": "f-1",
+                                "startDatetime": "not-a-date",
+                            },
+                            {
+                                "id": "a-2",
+                                "title": "Ride with good date",
+                                "activityFileId": "f-2",
+                                "startDatetime": "2026-08-15T06:00:00.000Z",
+                            },
+                        ],
+                    }
+                },
+            )
+        raise AssertionError(request.url)
+
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    store.save(MyWhooshToken(access_token="cached", refresh_token=None, whoosh_id=None))
+    client = MyWhooshClient(store, http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)))
+
+    activities = await client.list_activities("rider@example.com", "secret")
+
+    assert [a.id for a in activities] == ["a-2"]
+
+
+@pytest.mark.asyncio
+async def test_list_activities_raises_integration_error_on_envelope_shape_failure(tmp_path) -> None:
+    async def handler(request: httpx.Request) -> httpx.Response:
+        if request.url.path.endswith("/activities"):
+            return httpx.Response(200, json={"data": {"totalPages": 1}})
+        raise AssertionError(request.url)
+
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    store.save(MyWhooshToken(access_token="cached", refresh_token=None, whoosh_id=None))
+    client = MyWhooshClient(store, http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)))
+
     with pytest.raises(MyWhooshIntegrationError):
         await client.list_activities("rider@example.com", "secret")
+
+
+@pytest.mark.asyncio
+async def test_list_activities_respects_max_pages(tmp_path) -> None:
+    calls = []
+
+    async def handler(request: httpx.Request) -> httpx.Response:
+        if request.url.path.endswith("/activities"):
+            payload = json.loads(request.content)
+            page = payload["page"]
+            calls.append(page)
+            result = {
+                "data": {
+                    "totalPages": 5,
+                    "results": [
+                        {
+                            "id": f"a-{page}",
+                            "title": f"Ride {page}",
+                            "activityFileId": f"f-{page}",
+                            "startDatetime": "2026-08-15T06:00:00.000Z",
+                        }
+                    ],
+                }
+            }
+            return httpx.Response(200, json=result)
+        raise AssertionError(request.url)
+
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    store.save(MyWhooshToken(access_token="cached", refresh_token=None, whoosh_id=None))
+    client = MyWhooshClient(store, http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)))
+
+    activities = await client.list_activities("rider@example.com", "secret", max_pages=1)
+
+    assert calls == [1]
+    assert [a.id for a in activities] == ["a-1"]
+
+
+@pytest.mark.asyncio
+async def test_download_fit_raises_integration_error_on_invalid_json(tmp_path) -> None:
+    async def handler(request: httpx.Request) -> httpx.Response:
+        if request.url.path.endswith("/download-activity-file"):
+            return httpx.Response(200, content=b"not json", headers={"content-type": "application/json"})
+        raise AssertionError(request.url)
+
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    store.save(MyWhooshToken(access_token="cached", refresh_token=None, whoosh_id=None))
+    client = MyWhooshClient(store, http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)))
+
+    with pytest.raises(MyWhooshIntegrationError):
+        await client.download_fit("f-1", "rider@example.com", "secret")

tests/mywhoosh/test_client_auth.py

@@ -1,7 +1,12 @@
 import httpx
 import pytest
 
-from app.mywhoosh.client import MyWhooshClient, MyWhooshAuthError
+from app.mywhoosh.client import (
+    MyWhooshAuthError,
+    MyWhooshClient,
+    MyWhooshIntegrationError,
+    MyWhooshTransientError,
+)
 from app.mywhoosh.models import MyWhooshToken
 from app.mywhoosh.tokenstore import MyWhooshTokenStore
 
@@ -37,3 +42,93 @@ async def test_invalid_credentials_raise_auth_error(tmp_path) -> None:
     )
     with pytest.raises(MyWhooshAuthError):
         await client.login("rider@example.com", "bad")
+
+
+@pytest.mark.asyncio
+async def test_login_returns_json_array_raises_integration_error(tmp_path) -> None:
+    async def handler(request: httpx.Request) -> httpx.Response:
+        return httpx.Response(200, json=["not", "an", "object"])
+
+    client = MyWhooshClient(
+        MyWhooshTokenStore(tmp_path / "mywhoosh.json"),
+        http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)),
+    )
+    with pytest.raises(MyWhooshIntegrationError):
+        await client.login("rider@example.com", "bad")
+
+
+@pytest.mark.asyncio
+async def test_login_5xx_raises_transient_error(tmp_path) -> None:
+    async def handler(request: httpx.Request) -> httpx.Response:
+        return httpx.Response(503, text="Service Unavailable")
+
+    client = MyWhooshClient(
+        MyWhooshTokenStore(tmp_path / "mywhoosh.json"),
+        http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)),
+    )
+    with pytest.raises(MyWhooshTransientError):
+        await client.login("rider@example.com", "secret")
+
+
+@pytest.mark.asyncio
+async def test_second_401_after_reauth_raises_auth_error(tmp_path) -> None:
+    login_call_count = 0
+
+    async def handler(request: httpx.Request) -> httpx.Response:
+        nonlocal login_call_count
+        if request.url.path.endswith("/activities"):
+            return httpx.Response(401, json={"message": "expired"})
+        if request.url.path.endswith("/login"):
+            login_call_count += 1
+            return httpx.Response(
+                200,
+                json={
+                    "Success": True,
+                    "AccessToken": "fresh-access",
+                    "RefreshToken": "fresh-refresh",
+                    "WhooshId": "w-1",
+                },
+            )
+        raise AssertionError(request.url)
+
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    store.save(MyWhooshToken(access_token="stale", refresh_token=None, whoosh_id=None))
+    client = MyWhooshClient(store, http_client=httpx.AsyncClient(transport=httpx.MockTransport(handler)))
+
+    with pytest.raises(MyWhooshAuthError):
+        await client.list_activities("rider@example.com", "secret")
+
+    assert login_call_count == 1
+
+
+@pytest.mark.asyncio
+async def test_aclose_closes_self_owned_http_client(tmp_path) -> None:
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    client = MyWhooshClient(store)
+
+    await client.aclose()
+
+    assert client.http.is_closed is True
+
+
+@pytest.mark.asyncio
+async def test_aclose_does_not_close_injected_http_client(tmp_path) -> None:
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+    injected = httpx.AsyncClient()
+    client = MyWhooshClient(store, http_client=injected)
+
+    await client.aclose()
+
+    assert injected.is_closed is False
+    await injected.aclose()
+
+
+@pytest.mark.asyncio
+async def test_client_usable_as_async_context_manager(tmp_path) -> None:
+    store = MyWhooshTokenStore(tmp_path / "mywhoosh.json")
+
+    async with MyWhooshClient(store) as client:
+        http_client = client.http
+        assert http_client.is_closed is False
+
+    assert http_client.is_closed is True

tests/mywhoosh/test_tokenstore.py

@@ -16,3 +16,28 @@ def test_tokenstore_round_trip_and_permissions(tmp_path: Path) -> None:
 def test_missing_token_returns_none(tmp_path: Path) -> None:
     store = MyWhooshTokenStore(tmp_path / "missing.json")
     assert store.load() is None
+
+
+def test_corrupt_token_file_returns_none(tmp_path: Path) -> None:
+    path = tmp_path / "mywhoosh.json"
+    path.write_bytes(b"not valid json {{{")
+    store = MyWhooshTokenStore(path)
+    assert store.load() is None
+
+
+def test_token_file_missing_access_token_returns_none(tmp_path: Path) -> None:
+    path = tmp_path / "mywhoosh.json"
+    path.write_text('{"refresh_token": "r", "whoosh_id": "w"}', encoding="utf-8")
+    store = MyWhooshTokenStore(path)
+    assert store.load() is None
+
+
+def test_clear_removes_token_and_load_returns_none(tmp_path: Path) -> None:
+    store = MyWhooshTokenStore(tmp_path / "tokens" / "mywhoosh.json")
+    token = MyWhooshToken(access_token="access", refresh_token="refresh", whoosh_id="whoosh-1")
+    store.save(token)
+
+    store.clear()
+
+    assert store.load() is None
+    assert not store.path.exists()