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test_custom_component.py
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test_custom_component.py
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import ast
import pytest
import types
from uuid import uuid4
from fastapi import HTTPException
from langflow.services.database.models.flow import Flow, FlowCreate
from langflow.interface.custom.base import CustomComponent
from langflow.interface.custom.component import (
Component,
ComponentCodeNullError,
)
from langflow.interface.custom.code_parser import CodeParser, CodeSyntaxError
code_default = """
from langflow import Prompt
from langflow.interface.custom.custom_component import CustomComponent
from langchain.llms.base import BaseLLM
from langchain.chains import LLMChain
from langchain.prompts import PromptTemplate
from langchain.schema import Document
import requests
class YourComponent(CustomComponent):
display_name: str = "Your Component"
description: str = "Your description"
field_config = { "url": { "multiline": True, "required": True } }
def build(self, url: str, llm: BaseLLM, template: Prompt) -> Document:
response = requests.get(url)
prompt = PromptTemplate.from_template(template)
chain = LLMChain(llm=llm, prompt=prompt)
result = chain.run(response.text[:300])
return Document(page_content=str(result))
"""
def test_code_parser_init():
"""
Test the initialization of the CodeParser class.
"""
parser = CodeParser(code_default)
assert parser.code == code_default
def test_code_parser_get_tree():
"""
Test the __get_tree method of the CodeParser class.
"""
parser = CodeParser(code_default)
tree = parser._CodeParser__get_tree()
assert isinstance(tree, ast.AST)
def test_code_parser_syntax_error():
"""
Test the __get_tree method raises the
CodeSyntaxError when given incorrect syntax.
"""
code_syntax_error = "zzz import os"
parser = CodeParser(code_syntax_error)
with pytest.raises(CodeSyntaxError):
parser._CodeParser__get_tree()
def test_component_init():
"""
Test the initialization of the Component class.
"""
component = Component(code=code_default, _function_entrypoint_name="build")
assert component.code == code_default
assert component._function_entrypoint_name == "build"
def test_component_get_code_tree():
"""
Test the get_code_tree method of the Component class.
"""
component = Component(code=code_default, _function_entrypoint_name="build")
tree = component.get_code_tree(component.code)
assert "imports" in tree
def test_component_code_null_error():
"""
Test the get_function method raises the
ComponentCodeNullError when the code is empty.
"""
component = Component(code="", _function_entrypoint_name="")
with pytest.raises(ComponentCodeNullError):
component.get_function()
# TODO: Validate if we should remove this
# def test_component_function_entrypoint_name_null_error():
# """
# Test the get_function method raises the ComponentFunctionEntrypointNameNullError
# when the function_entrypoint_name is empty.
# """
# component = Component(code=code_default, _function_entrypoint_name="")
# with pytest.raises(ComponentFunctionEntrypointNameNullError):
# component.get_function()
def test_custom_component_init():
"""
Test the initialization of the CustomComponent class.
"""
function_entrypoint_name = "build"
custom_component = CustomComponent(
code=code_default, function_entrypoint_name=function_entrypoint_name
)
assert custom_component.code == code_default
assert custom_component.function_entrypoint_name == function_entrypoint_name
def test_custom_component_build_template_config():
"""
Test the build_template_config property of the CustomComponent class.
"""
custom_component = CustomComponent(
code=code_default, function_entrypoint_name="build"
)
config = custom_component.build_template_config
assert isinstance(config, dict)
def test_custom_component_get_function():
"""
Test the get_function property of the CustomComponent class.
"""
custom_component = CustomComponent(
code="def build(): pass", function_entrypoint_name="build"
)
my_function = custom_component.get_function
assert isinstance(my_function, types.FunctionType)
def test_code_parser_parse_imports_import():
"""
Test the parse_imports method of the CodeParser
class with an import statement.
"""
parser = CodeParser(code_default)
tree = parser._CodeParser__get_tree()
for node in ast.walk(tree):
if isinstance(node, ast.Import):
parser.parse_imports(node)
assert "requests" in parser.data["imports"]
def test_code_parser_parse_imports_importfrom():
"""
Test the parse_imports method of the CodeParser
class with an import from statement.
"""
parser = CodeParser("from os import path")
tree = parser._CodeParser__get_tree()
for node in ast.walk(tree):
if isinstance(node, ast.ImportFrom):
parser.parse_imports(node)
assert ("os", "path") in parser.data["imports"]
def test_code_parser_parse_functions():
"""
Test the parse_functions method of the CodeParser class.
"""
parser = CodeParser("def test(): pass")
tree = parser._CodeParser__get_tree()
for node in ast.walk(tree):
if isinstance(node, ast.FunctionDef):
parser.parse_functions(node)
assert len(parser.data["functions"]) == 1
assert parser.data["functions"][0]["name"] == "test"
def test_code_parser_parse_classes():
"""
Test the parse_classes method of the CodeParser class.
"""
parser = CodeParser("class Test: pass")
tree = parser._CodeParser__get_tree()
for node in ast.walk(tree):
if isinstance(node, ast.ClassDef):
parser.parse_classes(node)
assert len(parser.data["classes"]) == 1
assert parser.data["classes"][0]["name"] == "Test"
def test_code_parser_parse_global_vars():
"""
Test the parse_global_vars method of the CodeParser class.
"""
parser = CodeParser("x = 1")
tree = parser._CodeParser__get_tree()
for node in ast.walk(tree):
if isinstance(node, ast.Assign):
parser.parse_global_vars(node)
assert len(parser.data["global_vars"]) == 1
assert parser.data["global_vars"][0]["targets"] == ["x"]
def test_component_get_function_valid():
"""
Test the get_function method of the Component
class with valid code and function_entrypoint_name.
"""
component = Component(code="def build(): pass", _function_entrypoint_name="build")
my_function = component.get_function()
assert callable(my_function)
def test_custom_component_get_function_entrypoint_args():
"""
Test the get_function_entrypoint_args
property of the CustomComponent class.
"""
custom_component = CustomComponent(
code=code_default, function_entrypoint_name="build"
)
args = custom_component.get_function_entrypoint_args
assert len(args) == 4
assert args[0]["name"] == "self"
assert args[1]["name"] == "url"
assert args[2]["name"] == "llm"
def test_custom_component_get_function_entrypoint_return_type():
"""
Test the get_function_entrypoint_return_type
property of the CustomComponent class.
"""
custom_component = CustomComponent(
code=code_default, function_entrypoint_name="build"
)
return_type = custom_component.get_function_entrypoint_return_type
assert return_type == ["Document"]
def test_custom_component_get_main_class_name():
"""
Test the get_main_class_name property of the CustomComponent class.
"""
custom_component = CustomComponent(
code=code_default, function_entrypoint_name="build"
)
class_name = custom_component.get_main_class_name
assert class_name == "YourComponent"
def test_custom_component_get_function_valid():
"""
Test the get_function property of the CustomComponent
class with valid code and function_entrypoint_name.
"""
custom_component = CustomComponent(
code="def build(): pass", function_entrypoint_name="build"
)
my_function = custom_component.get_function
assert callable(my_function)
def test_code_parser_parse_arg_no_annotation():
"""
Test the parse_arg method of the CodeParser class without an annotation.
"""
parser = CodeParser("")
arg = ast.arg(arg="x", annotation=None)
result = parser.parse_arg(arg, None)
assert result["name"] == "x"
assert "type" not in result
def test_code_parser_parse_arg_with_annotation():
"""
Test the parse_arg method of the CodeParser class with an annotation.
"""
parser = CodeParser("")
arg = ast.arg(arg="x", annotation=ast.Name(id="int", ctx=ast.Load()))
result = parser.parse_arg(arg, None)
assert result["name"] == "x"
assert result["type"] == "int"
def test_code_parser_parse_callable_details_no_args():
"""
Test the parse_callable_details method of the
CodeParser class with a function with no arguments.
"""
parser = CodeParser("")
node = ast.FunctionDef(
name="test",
args=ast.arguments(
args=[], vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, defaults=[]
),
body=[],
decorator_list=[],
returns=None,
)
result = parser.parse_callable_details(node)
assert result["name"] == "test"
assert len(result["args"]) == 0
def test_code_parser_parse_assign():
"""
Test the parse_assign method of the CodeParser class.
"""
parser = CodeParser("")
stmt = ast.Assign(targets=[ast.Name(id="x", ctx=ast.Store())], value=ast.Num(n=1))
result = parser.parse_assign(stmt)
assert result["name"] == "x"
assert result["value"] == "1"
def test_code_parser_parse_ann_assign():
"""
Test the parse_ann_assign method of the CodeParser class.
"""
parser = CodeParser("")
stmt = ast.AnnAssign(
target=ast.Name(id="x", ctx=ast.Store()),
annotation=ast.Name(id="int", ctx=ast.Load()),
value=ast.Num(n=1),
simple=1,
)
result = parser.parse_ann_assign(stmt)
assert result["name"] == "x"
assert result["value"] == "1"
assert result["annotation"] == "int"
def test_code_parser_parse_function_def_not_init():
"""
Test the parse_function_def method of the
CodeParser class with a function that is not __init__.
"""
parser = CodeParser("")
stmt = ast.FunctionDef(
name="test",
args=ast.arguments(
args=[], vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, defaults=[]
),
body=[],
decorator_list=[],
returns=None,
)
result, is_init = parser.parse_function_def(stmt)
assert result["name"] == "test"
assert not is_init
def test_code_parser_parse_function_def_init():
"""
Test the parse_function_def method of the
CodeParser class with an __init__ function.
"""
parser = CodeParser("")
stmt = ast.FunctionDef(
name="__init__",
args=ast.arguments(
args=[], vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, defaults=[]
),
body=[],
decorator_list=[],
returns=None,
)
result, is_init = parser.parse_function_def(stmt)
assert result["name"] == "__init__"
assert is_init
def test_component_get_code_tree_syntax_error():
"""
Test the get_code_tree method of the Component class
raises the CodeSyntaxError when given incorrect syntax.
"""
component = Component(code="import os as", _function_entrypoint_name="build")
with pytest.raises(CodeSyntaxError):
component.get_code_tree(component.code)
def test_custom_component_class_template_validation_no_code():
"""
Test the _class_template_validation method of the CustomComponent class
raises the HTTPException when the code is None.
"""
custom_component = CustomComponent(code=None, function_entrypoint_name="build")
with pytest.raises(HTTPException):
custom_component._class_template_validation(custom_component.code)
def test_custom_component_get_code_tree_syntax_error():
"""
Test the get_code_tree method of the CustomComponent class
raises the CodeSyntaxError when given incorrect syntax.
"""
custom_component = CustomComponent(
code="import os as", function_entrypoint_name="build"
)
with pytest.raises(CodeSyntaxError):
custom_component.get_code_tree(custom_component.code)
def test_custom_component_get_function_entrypoint_args_no_args():
"""
Test the get_function_entrypoint_args property of
the CustomComponent class with a build method with no arguments.
"""
my_code = """
class MyMainClass(CustomComponent):
def build():
pass"""
custom_component = CustomComponent(code=my_code, function_entrypoint_name="build")
args = custom_component.get_function_entrypoint_args
assert len(args) == 0
def test_custom_component_get_function_entrypoint_return_type_no_return_type():
"""
Test the get_function_entrypoint_return_type property of the
CustomComponent class with a build method with no return type.
"""
my_code = """
class MyClass(CustomComponent):
def build():
pass"""
custom_component = CustomComponent(code=my_code, function_entrypoint_name="build")
return_type = custom_component.get_function_entrypoint_return_type
assert return_type == []
def test_custom_component_get_main_class_name_no_main_class():
"""
Test the get_main_class_name property of the
CustomComponent class when there is no main class.
"""
my_code = """
def build():
pass"""
custom_component = CustomComponent(code=my_code, function_entrypoint_name="build")
class_name = custom_component.get_main_class_name
assert class_name == ""
def test_custom_component_build_not_implemented():
"""
Test the build method of the CustomComponent
class raises the NotImplementedError.
"""
custom_component = CustomComponent(
code="def build(): pass", function_entrypoint_name="build"
)
with pytest.raises(NotImplementedError):
custom_component.build()
def test_build_config_no_code():
component = CustomComponent(code=None)
assert component.get_function_entrypoint_args == ""
assert component.get_function_entrypoint_return_type == []
@pytest.fixture
def component(client, active_user):
return CustomComponent(
user_id=active_user.id,
field_config={
"fields": {
"llm": {"type": "str"},
"url": {"type": "str"},
"year": {"type": "int"},
}
},
)
@pytest.fixture(scope="session")
def test_flow(db):
flow_data = {
"nodes": [{"id": "1"}, {"id": "2"}],
"edges": [{"source": "1", "target": "2"}],
}
# Create flow
flow = FlowCreate(
id=uuid4(), name="Test Flow", description="Fixture flow", data=flow_data
)
# Add to database
db.add(flow)
db.commit()
yield flow
# Clean up
db.delete(flow)
db.commit()
@pytest.fixture(scope="session")
def db(app):
# Setup database for tests
yield app.db
# Teardown
app.db.drop_all()
def test_list_flows_return_type(component):
flows = component.list_flows()
assert isinstance(flows, list)
def test_list_flows_flow_objects(component):
flows = component.list_flows()
assert all(isinstance(flow, Flow) for flow in flows)
def test_build_config_return_type(component):
config = component.build_config()
assert isinstance(config, dict)
def test_build_config_has_fields(component):
config = component.build_config()
assert "fields" in config
def test_build_config_fields_dict(component):
config = component.build_config()
assert isinstance(config["fields"], dict)
def test_build_config_field_keys(component):
config = component.build_config()
assert all(isinstance(key, str) for key in config["fields"])
def test_build_config_field_values_dict(component):
config = component.build_config()
assert all(isinstance(value, dict) for value in config["fields"].values())
def test_build_config_field_value_keys(component):
config = component.build_config()
field_values = config["fields"].values()
assert all("type" in value for value in field_values)