test(backend): add deterministic Composio Gmail E2E fakes

surfsense_backend/tests/e2e/fakes/chat_llm.py

@@ -13,6 +13,7 @@ from langchain_core.messages import AIMessage, AIMessageChunk, BaseMessage
 from langchain_core.outputs import ChatGeneration, ChatGenerationChunk, ChatResult
 
 DRIVE_CANARY_TOKEN = "SURFSENSE_E2E_CANARY_TOKEN_DRIVE_001"
+GMAIL_CANARY_TOKEN = "SURFSENSE_E2E_CANARY_TOKEN_GMAIL_001"
 NO_RELEVANT_CONTENT_SENTINEL = "No relevant indexed content found."
 NO_RELEVANT_CONTENT_QUERY = "E2E_NO_RELEVANT_CONTENT_SMOKE"
 
@@ -36,6 +37,11 @@ def _messages_to_text(messages: list[BaseMessage]) -> str:
     return "\n".join(_content_to_text(message.content) for message in messages)
 
 
+def _contains_any(text: str, needles: tuple[str, ...]) -> bool:
+    lowered = text.lower()
+    return any(needle.lower() in lowered for needle in needles)
+
+
 class FakeChatLLM(BaseChatModel):
     @property
     def _llm_type(self) -> str:
@@ -57,11 +63,32 @@ class FakeChatLLM(BaseChatModel):
             return NO_RELEVANT_CONTENT_SENTINEL
 
         prompt_text = _messages_to_text(messages)
-        if (
+        wants_gmail = _contains_any(
-            "e2e-canary" in prompt_text
+            latest_human,
+            ("gmail", "email", "message", "E2E Canary Email"),
+        )
+        wants_drive = _contains_any(
+            latest_human,
+            ("drive", "file", "e2e-canary.txt"),
+        )
+        has_gmail_evidence = (
+            "E2E Canary Email" in prompt_text
+            or "fake-msg-canary-001" in prompt_text
+            or GMAIL_CANARY_TOKEN in prompt_text
+        )
+        has_drive_evidence = (
+            "e2e-canary.txt" in prompt_text
             or "fake-file-canary" in prompt_text
             or DRIVE_CANARY_TOKEN in prompt_text
-        ):
+        )
+
+        if wants_gmail and has_gmail_evidence:
+            return f"Gmail content found: {GMAIL_CANARY_TOKEN}"
+        if wants_drive and has_drive_evidence:
+            return f"Drive content found: {DRIVE_CANARY_TOKEN}"
+        if has_gmail_evidence and not has_drive_evidence:
+            return f"Gmail content found: {GMAIL_CANARY_TOKEN}"
+        if has_drive_evidence and not has_gmail_evidence:
             return f"Drive content found: {DRIVE_CANARY_TOKEN}"
         return NO_RELEVANT_CONTENT_SENTINEL
 

surfsense_backend/tests/e2e/fakes/composio_module.py

@@ -29,17 +29,25 @@ logger = logging.getLogger(__name__)
 # Fixture loading
 # ---------------------------------------------------------------------------
 
-_FIXTURE_PATH = Path(__file__).parent / "fixtures" / "drive_files.json"
+_DRIVE_FIXTURE_PATH = Path(__file__).parent / "fixtures" / "drive_files.json"
+_GMAIL_FIXTURE_PATH = Path(__file__).parent / "fixtures" / "gmail_messages.json"
 _DRIVE_DOWNLOAD_DIR = Path("/tmp/surfsense-e2e-composio-downloads")
 
 
 def _load_drive_fixture() -> dict[str, Any]:
     """Load the canned Drive fixture once per process."""
-    with _FIXTURE_PATH.open() as f:
+    with _DRIVE_FIXTURE_PATH.open() as f:
+        return json.load(f)
+
+
+def _load_gmail_fixture() -> dict[str, Any]:
+    """Load the canned Gmail fixture once per process."""
+    with _GMAIL_FIXTURE_PATH.open() as f:
         return json.load(f)
 
 
 _DRIVE_FIXTURE = _load_drive_fixture()
+_GMAIL_FIXTURE = _load_gmail_fixture()
 
 
 def _get_scenario() -> str:
@@ -278,6 +286,10 @@ class _Tools(_StrictFakeMixin):
             return {"data": {"user": {"emailAddress": "e2e-fake@surfsense.example"}}}
         if slug == "GMAIL_GET_PROFILE":
             return {"data": {"emailAddress": "e2e-fake@surfsense.example"}}
+        if slug == "GMAIL_FETCH_EMAILS":
+            return _gmail_fetch_emails(args)
+        if slug == "GMAIL_FETCH_MESSAGE_BY_MESSAGE_ID":
+            return _gmail_fetch_message_by_message_id(args)
         if slug == "GOOGLECALENDAR_CALENDARS_LIST":
             return {
                 "data": {
@@ -414,6 +426,42 @@ def _drive_get_metadata(args: dict[str, Any]) -> dict[str, Any]:
     )
 
 
+# ---------------------------------------------------------------------------
+# Gmail tool handlers
+# ---------------------------------------------------------------------------
+
+
+def _gmail_fetch_emails(args: dict[str, Any]) -> dict[str, Any]:
+    """Mimic GMAIL_FETCH_EMAILS.
+
+    The production indexer uses this as a list page, then calls
+    GMAIL_FETCH_MESSAGE_BY_MESSAGE_ID for the full body of each id.
+    """
+    del args
+    messages = list(_GMAIL_FIXTURE.get("messages", []))
+    return {
+        "data": {
+            "messages": messages,
+            "nextPageToken": None,
+            "resultSizeEstimate": len(messages),
+        }
+    }
+
+
+def _gmail_fetch_message_by_message_id(args: dict[str, Any]) -> dict[str, Any]:
+    """Mimic GMAIL_FETCH_MESSAGE_BY_MESSAGE_ID."""
+    message_id = args.get("message_id", "")
+    details = _GMAIL_FIXTURE.get("details", {})
+    detail = details.get(message_id)
+    if detail is None:
+        raise NotImplementedError(
+            f"E2E Composio fake has no Gmail detail fixture for "
+            f"message_id={message_id!r}. Add it under 'details' in "
+            f"surfsense_backend/tests/e2e/fakes/fixtures/gmail_messages.json."
+        )
+    return {"data": detail}
+
+
 # ---------------------------------------------------------------------------
 # Errors
 # ---------------------------------------------------------------------------

surfsense_backend/tests/e2e/fakes/fixtures/gmail_messages.json

@@ -0,0 +1,34 @@
+{
+  "messages": [
+    {
+      "id": "fake-msg-canary-001",
+      "threadId": "fake-thread-canary-001",
+      "snippet": "E2E canary email body is loaded through the Gmail detail endpoint."
+    },
+    {
+      "id": "fake-msg-planning-001",
+      "threadId": "fake-thread-planning-001",
+      "snippet": "Planning email used to keep Gmail fixtures representative."
+    }
+  ],
+  "details": {
+    "fake-msg-canary-001": {
+      "id": "fake-msg-canary-001",
+      "threadId": "fake-thread-canary-001",
+      "subject": "E2E Canary Email",
+      "from": "sender@surfsense.example",
+      "to": "e2e-fake@surfsense.example",
+      "date": "Mon, 10 Feb 2025 11:00:00 +0000",
+      "messageText": "This Gmail message body proves the Composio Gmail indexer fetched message details. SURFSENSE_E2E_CANARY_TOKEN_GMAIL_001"
+    },
+    "fake-msg-planning-001": {
+      "id": "fake-msg-planning-001",
+      "threadId": "fake-thread-planning-001",
+      "subject": "E2E Planning Notes",
+      "from": "planner@surfsense.example",
+      "to": "e2e-fake@surfsense.example",
+      "date": "Tue, 11 Feb 2025 09:30:00 +0000",
+      "messageText": "Planning notes for a non-canary Gmail fixture."
+    }
+  }
+}