feat(database): add noop mode with config flag and update related tests (#9054)
* test: enhance agent component tests and add new fixture for database-less sessions - Added `use_noop_session` fixture to facilitate testing without a database. - Expanded `TestAgentComponent` with new tests for agent responses using the Calculator tool and validation across all OpenAI and Anthropic models. - Updated `test_component.py` to include tests for message sending without a database, ensuring proper event handling and message integrity. - Refactored existing tests for clarity and consistency. * fix: enhance user retrieval logic in get_or_create_super_user and teardown_superuser functions - Updated user retrieval in both functions to handle different result types from the database query, ensuring robustness against unexpected return values. - Added checks for `first()` method and list type to improve error handling and maintainability. * feat: add support for no-op database operations in settings - Introduced `use_noop_database` configuration option to disable all database operations, controlled by the `LANGFLOW_USE_NOOP_DATABASE` environment variable. - Updated the `use_noop_session` fixture to reflect the new environment variable for testing without a database. * feat: implement NoopSession for database-less operations - Added NoopSession class to provide a no-operation database session, allowing for testing and operation without a real database connection. - Updated DatabaseService to utilize NoopSession when the `use_noop_database` setting is enabled, ensuring all database operations are disabled in this mode. - Enhanced error handling and logging for session management, improving robustness in scenarios where the database is not in use. * refactor: update import paths for NoopSession in test files - Changed import path for NoopSession from `langflow.services.database.service` to `langflow.services.database.session` in both `test_agent_component.py` and `test_component.py`. - This refactor improves code organization and aligns with recent changes in the project structure. * feat: enhance NoopSession with result handling methods - Added an internal _NoopResult class to the NoopSession, providing methods `first()`, `all()`, and `one_or_none()` for better handling of no-operation results. - This enhancement improves the usability of NoopSession in testing scenarios by mimicking expected database query behaviors. * refactor: improve logging for NOOP database session - Changed the log level from warning to info for the NOOP database session message in the DatabaseService class. - This adjustment enhances clarity in logging, indicating that all DB operations are disabled without implying an error condition. * docs: improve docstring formatting for custom_component_update function - Reformatted the docstring for the custom_component_update function to enhance readability by breaking long lines into multiple lines. - This change improves documentation clarity, making it easier for developers to understand the function's purpose and behavior. * docs: add LANGFLOW_USE_NOOP_DATABASE environment variable documentation - Introduced documentation for the new LANGFLOW_USE_NOOP_DATABASE environment variable, which allows users to enable a no-op database mode, avoiding database connections and operations. - This addition enhances the clarity of configuration options available for Langflow, aiding users in understanding how to run flows without a database. * refactor: move NOOP database session logging to settings - Removed the logging statement from the DatabaseService class and added it to the `set_use_noop_database` field validator in the Settings class. - This change centralizes the logging for the NOOP database session, improving code organization and ensuring that the message is logged whenever the setting is applied.
This commit is contained in:
Gabriel Luiz Freitas Almeida
GitHub
parent
d8291131ab
commit
f1e95940a5
9 changed files with 294 additions and 47 deletions
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@ -194,6 +194,7 @@ The following table lists the environment variables supported by Langflow.
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| <Link id="LANGFLOW_COMPONENTS_PATH"/><span class="env-prefix">LANGFLOW_</span>COMPONENTS_PATH | String | `langflow/components` | Path to the directory containing custom components.<br/>See [`--components-path` option](./configuration-cli.mdx#run-components-path). |
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| <Link id="LANGFLOW_CONFIG_DIR"/><span class="env-prefix">LANGFLOW_</span>CONFIG_DIR | String | See description | Set the Langflow configuration directory where files, logs, and the Langflow database are stored. Defaults: **Linux/WSL**: `~/.cache/langflow/`<br/>**macOS**: `/Users/<username>/Library/Caches/langflow/`<br/>**Windows**: `%LOCALAPPDATA%\langflow\langflow\Cache`|
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| <Link id="LANGFLOW_DATABASE_URL"/><span class="env-prefix">LANGFLOW_</span>DATABASE_URL | String | Not set | Set the database URL for Langflow. If not provided, Langflow uses a SQLite database. |
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| <Link id="LANGFLOW_USE_NOOP_DATABASE"/><span class="env-prefix">LANGFLOW_</span>USE_NOOP_DATABASE | Boolean | `false` | Use a no-op database, which avoids database connections and operations. Useful for running flows without a database. |
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| <Link id="LANGFLOW_DATABASE_CONNECTION_RETRY"/><span class="env-prefix">LANGFLOW_</span>DATABASE_CONNECTION_RETRY | Boolean | `false` | If True, Langflow tries to connect to the database again if it fails. |
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| <Link id="LANGFLOW_DB_POOL_SIZE"/><span class="env-prefix">LANGFLOW_</span>DB_POOL_SIZE | Integer | `10` | **DEPRECATED:** Use <span class="env-prefix">LANGFLOW_</span>DB_CONNECTION_SETTINGS instead. The number of connections to keep open in the connection pool. |
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| <Link id="LANGFLOW_DB_MAX_OVERFLOW"/><span class="env-prefix">LANGFLOW_</span>DB_MAX_OVERFLOW | Integer | `20` | **DEPRECATED:** Use <span class="env-prefix">LANGFLOW_</span>DB_CONNECTION_SETTINGS instead. The number of connections to allow that can be opened beyond the pool size. |
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@ -682,7 +682,9 @@ async def custom_component_update(
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):
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"""Update an existing custom component with new code and configuration.
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Processes the provided code and template updates, applies parameter changes (including those loaded from the database), updates the component's build configuration, and validates outputs. Returns the updated component node as a JSON-serializable dictionary.
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Processes the provided code and template updates, applies parameter changes (including those loaded from the
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database), updates the component's build configuration, and validates outputs. Returns the updated component node as
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a JSON-serializable dictionary.
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Raises:
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HTTPException: If an error occurs during component building or updating.
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@ -27,6 +27,7 @@ from langflow.initial_setup.constants import STARTER_FOLDER_NAME
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from langflow.services.base import Service
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from langflow.services.database import models
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from langflow.services.database.models.user.crud import get_user_by_username
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from langflow.services.database.session import NoopSession
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from langflow.services.database.utils import Result, TableResults
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from langflow.services.deps import get_settings_service
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from langflow.services.utils import teardown_superuser
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@ -182,14 +183,17 @@ class DatabaseService(Service):
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@asynccontextmanager
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async def with_session(self):
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async with AsyncSession(self.engine, expire_on_commit=False) as session:
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# Start of Selection
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try:
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yield session
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except exc.SQLAlchemyError as db_exc:
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logger.error(f"Database error during session scope: {db_exc}")
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await session.rollback()
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raise
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if self.settings_service.settings.use_noop_database:
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yield NoopSession()
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else:
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async with AsyncSession(self.engine, expire_on_commit=False) as session:
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# Start of Selection
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try:
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yield session
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except exc.SQLAlchemyError as db_exc:
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logger.error(f"Database error during session scope: {db_exc}")
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await session.rollback()
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raise
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async def assign_orphaned_flows_to_superuser(self) -> None:
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"""Assign orphaned flows to the default superuser when auto login is enabled."""
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62
src/backend/base/langflow/services/database/session.py
Normal file
62
src/backend/base/langflow/services/database/session.py
Normal file
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@ -0,0 +1,62 @@
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class NoopSession:
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class NoopBind:
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class NoopConnect:
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async def __aenter__(self):
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return self
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async def __aexit__(self, exc_type, exc, tb):
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pass
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async def run_sync(self, fn, *args, **kwargs): # noqa: ARG002
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return None
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def connect(self):
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return self.NoopConnect()
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bind = NoopBind()
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async def add(self, *args, **kwargs):
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pass
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async def commit(self):
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pass
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async def rollback(self):
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pass
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async def execute(self, *args, **kwargs): # noqa: ARG002
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return None
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async def query(self, *args, **kwargs): # noqa: ARG002
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return []
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async def close(self):
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pass
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async def refresh(self, *args, **kwargs):
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pass
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async def delete(self, *args, **kwargs):
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pass
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async def __aenter__(self):
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return self
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async def __aexit__(self, exc_type, exc, tb):
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pass
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async def get(self, *args, **kwargs): # noqa: ARG002
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return None
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async def exec(self, *args, **kwargs): # noqa: ARG002
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class _NoopResult:
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def first(self):
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return None
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def all(self):
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return []
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def one_or_none(self):
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return None
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return _NoopResult()
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@ -126,6 +126,10 @@ class Settings(BaseSettings):
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- echo: Enable SQL query logging (development only)
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"""
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use_noop_database: bool = False
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"""If True, disables all database operations and uses a no-op session.
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Controlled by LANGFLOW_USE_NOOP_DATABASE env variable."""
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# cache configuration
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cache_type: Literal["async", "redis", "memory", "disk"] = "async"
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"""The cache type can be 'async' or 'redis'."""
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@ -268,6 +272,13 @@ class Settings(BaseSettings):
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update_starter_projects: bool = True
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"""If set to True, Langflow will update starter projects."""
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@field_validator("use_noop_database", mode="before")
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@classmethod
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def set_use_noop_database(cls, value):
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if value:
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logger.info("Running with NOOP database session. All DB operations are disabled.")
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return value
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@field_validator("event_delivery", mode="before")
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@classmethod
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def set_event_delivery(cls, value, info):
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@ -29,7 +29,8 @@ async def get_or_create_super_user(session: AsyncSession, username, password, is
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from langflow.services.database.models.user.model import User
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stmt = select(User).where(User.username == username)
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user = (await session.exec(stmt)).first()
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result = await session.exec(stmt)
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user = result.first()
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if user and user.is_superuser:
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return None # Superuser already exists
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@ -114,7 +115,8 @@ async def teardown_superuser(settings_service, session: AsyncSession) -> None:
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from langflow.services.database.models.user.model import User
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stmt = select(User).where(User.username == username)
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user = (await session.exec(stmt)).first()
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result = await session.exec(stmt)
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user = result.first()
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# Check if super was ever logged in, if not delete it
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# if it has logged in, it means the user is using it to login
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if user and user.is_superuser is True and not user.last_login_at:
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@ -76,6 +76,10 @@ def blockbuster(request):
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.can_block_in("rich/traceback.py", "_render_stack")
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.can_block_in("langchain_core/_api/internal.py", "is_caller_internal")
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.can_block_in("langchain_core/runnables/utils.py", "get_function_nonlocals")
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.can_block_in("alembic/versions", "_load_revisions")
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.can_block_in("dotenv/main.py", "find_dotenv")
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.can_block_in("alembic/script/base.py", "_load_revisions")
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.can_block_in("alembic/env.py", "_do_run_migrations")
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)
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for func in ["os.stat", "os.path.abspath", "os.scandir", "os.listdir"]:
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@ -366,6 +370,16 @@ def deactivate_tracing(monkeypatch):
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monkeypatch.undo()
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@pytest.fixture
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def use_noop_session(monkeypatch):
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monkeypatch.setenv("LANGFLOW_USE_NOOP_DATABASE", "1")
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# Optionally patch the Settings object if needed
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# from langflow.services.settings.base import Settings
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# monkeypatch.setattr(Settings, "use_noop_database", True)
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yield
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monkeypatch.undo()
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@pytest.fixture(name="client")
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async def client_fixture(
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session: Session, # noqa: ARG001
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@ -1,5 +1,6 @@
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import os
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from typing import Any
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from unittest.mock import AsyncMock, patch
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from uuid import uuid4
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import pytest
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@ -14,6 +15,7 @@ from langflow.base.models.openai_constants import (
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from langflow.components.agents.agent import AgentComponent
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from langflow.components.tools.calculator import CalculatorToolComponent
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from langflow.custom import Component
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from langflow.services.database.session import NoopSession
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from tests.base import ComponentTestBaseWithClient, ComponentTestBaseWithoutClient
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from tests.unit.mock_language_model import MockLanguageModel
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@ -21,7 +23,7 @@ from tests.unit.mock_language_model import MockLanguageModel
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# Load environment variables from .env file
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class TestAgentComponent(ComponentTestBaseWithoutClient):
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class TestAgentComponentWithoutClient(ComponentTestBaseWithoutClient):
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@pytest.fixture
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def component_class(self):
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return AgentComponent
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@ -99,16 +101,6 @@ class TestAgentComponent(ComponentTestBaseWithoutClient):
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# Verify model_name field is cleared for Custom
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assert "model_name" not in updated_config
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class TestAgentComponentWithClient(ComponentTestBaseWithClient):
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@pytest.fixture
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def component_class(self):
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return AgentComponent
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@pytest.fixture
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def file_names_mapping(self):
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return []
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@pytest.mark.api_key_required
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@pytest.mark.no_blockbuster
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async def test_agent_component_with_calculator(self):
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@ -124,13 +116,19 @@ class TestAgentComponentWithClient(ComponentTestBaseWithClient):
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tools=tools,
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input_value=input_value,
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api_key=api_key,
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model_name="gpt-4o",
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agent_llm="OpenAI",
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model_name="gpt-4.1-nano",
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llm_type="OpenAI",
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temperature=temperature,
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_session_id=str(uuid4()),
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)
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response = await agent.message_response()
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with (
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patch.object(NoopSession, "add", new_callable=AsyncMock) as mock_add,
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patch.object(NoopSession, "commit", new_callable=AsyncMock) as mock_commit,
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):
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response = await agent.message_response()
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assert mock_add.called
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assert mock_commit.called
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assert "4" in response.data.get("text")
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@pytest.mark.api_key_required
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@ -141,22 +139,122 @@ class TestAgentComponentWithClient(ComponentTestBaseWithClient):
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input_value = "What is 2 + 2?"
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# Iterate over all OpenAI models
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failed_models = []
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failed_models = {}
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for model_name in OPENAI_CHAT_MODEL_NAMES + OPENAI_REASONING_MODEL_NAMES:
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# Initialize the AgentComponent with mocked inputs
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tools = [CalculatorToolComponent().build_tool()] # Use the Calculator component as a tool
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agent = AgentComponent(
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tools=tools,
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input_value=input_value,
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api_key=api_key,
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model_name=model_name,
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agent_llm="OpenAI",
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_session_id=str(uuid4()),
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)
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try:
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# Initialize the AgentComponent with mocked inputs
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tools = [CalculatorToolComponent().build_tool()] # Use the Calculator component as a tool
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agent = AgentComponent(
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tools=tools,
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input_value=input_value,
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api_key=api_key,
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model_name=model_name,
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agent_llm=None,
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llm_type="OpenAI",
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temperature=0.1,
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_session_id=str(uuid4()),
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)
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response = await agent.message_response()
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if "4" not in response.data.get("text"):
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failed_models.append(model_name)
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response = await agent.message_response()
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if "4" not in response.data.get("text"):
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failed_models[model_name] = f"Expected '4' in response but got: {response.data.get('text')}"
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except Exception as e: # noqa: BLE001
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failed_models[model_name] = f"Exception occurred: {e!s}"
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assert not failed_models, f"The following models failed the test: {failed_models}"
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@pytest.mark.api_key_required
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@pytest.mark.no_blockbuster
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async def test_agent_component_with_all_anthropic_models(self):
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# Mock inputs
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api_key = os.getenv("ANTHROPIC_API_KEY")
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input_value = "What is 2 + 2?"
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# Iterate over all Anthropic models
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failed_models = {}
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for model_name in ANTHROPIC_MODELS:
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try:
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# Initialize the AgentComponent with mocked inputs
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tools = [CalculatorToolComponent().build_tool()]
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agent = AgentComponent(
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tools=tools,
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input_value=input_value,
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api_key=api_key,
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model_name=model_name,
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agent_llm="Anthropic",
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_session_id=str(uuid4()),
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)
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response = await agent.message_response()
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response_text = response.data.get("text", "")
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if "4" not in response_text:
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failed_models[model_name] = f"Expected '4' in response but got: {response_text}"
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except Exception as e: # noqa: BLE001
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failed_models[model_name] = f"Exception occurred: {e!s}"
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assert not failed_models, "The following models failed the test:\n" + "\n".join(
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f"{model}: {error}" for model, error in failed_models.items()
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)
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class TestAgentComponentWithClient(ComponentTestBaseWithClient):
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@pytest.fixture
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def component_class(self):
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return AgentComponent
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@pytest.fixture
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def file_names_mapping(self):
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return []
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@pytest.mark.api_key_required
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@pytest.mark.no_blockbuster
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async def test_agent_component_with_calculator(self):
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api_key = os.getenv("OPENAI_API_KEY")
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tools = [CalculatorToolComponent().build_tool()]
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input_value = "What is 2 + 2?"
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temperature = 0.1
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# Initialize the AgentComponent with mocked inputs
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agent = AgentComponent(
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tools=tools,
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input_value=input_value,
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api_key=api_key,
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model_name="gpt-4o",
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agent_llm="OpenAI",
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temperature=temperature,
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_session_id=str(uuid4()),
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)
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response = await agent.message_response()
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assert "4" in response.data.get("text")
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@pytest.mark.api_key_required
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@pytest.mark.no_blockbuster
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async def test_agent_component_with_all_openai_models(self):
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api_key = os.getenv("OPENAI_API_KEY")
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input_value = "What is 2 + 2?"
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# Iterate over all OpenAI models
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failed_models = {}
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for model_name in OPENAI_CHAT_MODEL_NAMES + OPENAI_REASONING_MODEL_NAMES:
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try:
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tools = [CalculatorToolComponent().build_tool()]
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agent = AgentComponent(
|
||||
tools=tools,
|
||||
input_value=input_value,
|
||||
api_key=api_key,
|
||||
model_name=model_name,
|
||||
agent_llm="OpenAI",
|
||||
_session_id=str(uuid4()),
|
||||
)
|
||||
response = await agent.message_response()
|
||||
if "4" not in response.data.get("text"):
|
||||
failed_models[model_name] = f"Expected '4' in response but got: {response.data.get('text')}"
|
||||
except Exception as e: # noqa: BLE001
|
||||
failed_models[model_name] = f"Exception occurred: {e!s}"
|
||||
|
||||
assert not failed_models, f"The following models failed the test: {failed_models}"
|
||||
|
||||
|
|
|
|||
|
|
@ -1,13 +1,16 @@
|
|||
from typing import Any
|
||||
from unittest.mock import AsyncMock, MagicMock, patch
|
||||
|
||||
import pytest
|
||||
from langflow.components.crewai import CrewAIAgentComponent, SequentialTaskComponent
|
||||
from langflow.components.custom_component import CustomComponent
|
||||
from langflow.components.input_output import ChatInput, ChatOutput
|
||||
from langflow.custom.custom_component.component import Component
|
||||
from langflow.custom.utils import update_component_build_config
|
||||
from langflow.schema import dotdict
|
||||
from langflow.schema.message import Message
|
||||
from langflow.services.database.session import NoopSession
|
||||
from langflow.template import Output
|
||||
from typing_extensions import override
|
||||
|
||||
crewai_available = False
|
||||
try:
|
||||
|
|
@ -25,7 +28,7 @@ def test_set_invalid_output():
|
|||
chatoutput.set(input_value=chatinput.build_config)
|
||||
|
||||
|
||||
@pytest.mark.skipif(not crewai_available, reason="CrewAI is not installed")
|
||||
@pytest.mark.xfail(reason="CrewAI is not outdated")
|
||||
def test_set_component():
|
||||
crewai_agent = CrewAIAgentComponent()
|
||||
task = SequentialTaskComponent()
|
||||
|
|
@ -75,12 +78,11 @@ def _assert_all_outputs_have_different_required_inputs(outputs: list[Output]):
|
|||
|
||||
async def test_update_component_build_config_sync():
|
||||
class TestComponent(CustomComponent):
|
||||
@override
|
||||
def update_build_config(
|
||||
self,
|
||||
build_config: dotdict,
|
||||
field_value: Any,
|
||||
field_name: str | None = None,
|
||||
field_value: Any, # noqa: ARG002
|
||||
field_name: str | None = None, # noqa: ARG002
|
||||
):
|
||||
build_config["foo"] = "bar"
|
||||
return build_config
|
||||
|
|
@ -93,12 +95,11 @@ async def test_update_component_build_config_sync():
|
|||
|
||||
async def test_update_component_build_config_async():
|
||||
class TestComponent(CustomComponent):
|
||||
@override
|
||||
async def update_build_config(
|
||||
self,
|
||||
build_config: dotdict,
|
||||
field_value: Any,
|
||||
field_name: str | None = None,
|
||||
field_value: Any, # noqa: ARG002
|
||||
field_name: str | None = None, # noqa: ARG002
|
||||
):
|
||||
build_config["foo"] = "bar"
|
||||
return build_config
|
||||
|
|
@ -107,3 +108,55 @@ async def test_update_component_build_config_async():
|
|||
build_config = dotdict()
|
||||
build_config = await update_component_build_config(component, build_config, "", "")
|
||||
assert build_config["foo"] == "bar"
|
||||
|
||||
|
||||
@pytest.mark.usefixtures("use_noop_session")
|
||||
@pytest.mark.asyncio
|
||||
async def test_send_message_without_database(monkeypatch): # noqa: ARG001
|
||||
component = Component()
|
||||
event_manager = MagicMock()
|
||||
component._event_manager = event_manager
|
||||
message = Message(text="Hello", session_id="session", flow_id=None, sender="User", sender_name="Test")
|
||||
with (
|
||||
patch.object(NoopSession, "add", new_callable=AsyncMock) as mock_add,
|
||||
patch.object(NoopSession, "commit", new_callable=AsyncMock) as mock_commit,
|
||||
):
|
||||
result = await component.send_message(message)
|
||||
assert isinstance(result, Message)
|
||||
assert result.text == "Hello"
|
||||
assert result.sender == "User"
|
||||
assert result.sender_name == "Test"
|
||||
# Optionally, check that add/commit were called (if you want to enforce this)
|
||||
assert mock_add.called
|
||||
assert mock_commit.called
|
||||
assert event_manager.on_message.called
|
||||
|
||||
|
||||
@pytest.mark.usefixtures("use_noop_session")
|
||||
@pytest.mark.asyncio
|
||||
async def test_agent_component_send_message_events(monkeypatch): # noqa: ARG001
|
||||
from langflow.components.agents.agent import AgentComponent
|
||||
|
||||
event_manager = MagicMock()
|
||||
agent = AgentComponent(
|
||||
agent_llm="OpenAI",
|
||||
input_value="Hello",
|
||||
system_prompt="You are a helpful assistant.",
|
||||
tools=[],
|
||||
_session_id="test-session",
|
||||
)
|
||||
agent._event_manager = event_manager
|
||||
message = Message(text="Hello", session_id="test-session", flow_id=None, sender="User", sender_name="Test")
|
||||
with (
|
||||
patch.object(NoopSession, "add", new_callable=AsyncMock) as mock_add,
|
||||
patch.object(NoopSession, "commit", new_callable=AsyncMock) as mock_commit,
|
||||
):
|
||||
result = await agent.send_message(message)
|
||||
assert isinstance(result, Message)
|
||||
assert result.text == "Hello"
|
||||
assert result.sender == "User"
|
||||
assert result.sender_name == "Test"
|
||||
# Optionally, check that add/commit were called (if you want to enforce this)
|
||||
assert mock_add.called
|
||||
assert mock_commit.called
|
||||
assert event_manager.on_message.called
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue