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758 lines
24 KiB
Python
758 lines
24 KiB
Python
"""Test Flow creation and execution basic functionality."""
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import asyncio
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from datetime import datetime
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import pytest
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from pydantic import BaseModel
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from crewai.flow.flow import Flow, and_, listen, or_, router, start
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from crewai.utilities.events import (
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FlowFinishedEvent,
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FlowStartedEvent,
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MethodExecutionFinishedEvent,
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MethodExecutionStartedEvent,
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crewai_event_bus,
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)
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from crewai.utilities.events.flow_events import FlowPlotEvent
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def test_simple_sequential_flow():
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"""Test a simple flow with two steps called sequentially."""
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execution_order = []
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class SimpleFlow(Flow):
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@start()
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def step_1(self):
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execution_order.append("step_1")
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@listen(step_1)
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def step_2(self):
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execution_order.append("step_2")
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flow = SimpleFlow()
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flow.kickoff()
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assert execution_order == ["step_1", "step_2"]
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def test_flow_with_multiple_starts():
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"""Test a flow with multiple start methods."""
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execution_order = []
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class MultiStartFlow(Flow):
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@start()
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def step_a(self):
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execution_order.append("step_a")
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@start()
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def step_b(self):
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execution_order.append("step_b")
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@listen(step_a)
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def step_c(self):
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execution_order.append("step_c")
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@listen(step_b)
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def step_d(self):
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execution_order.append("step_d")
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flow = MultiStartFlow()
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flow.kickoff()
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assert "step_a" in execution_order
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assert "step_b" in execution_order
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assert "step_c" in execution_order
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assert "step_d" in execution_order
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assert execution_order.index("step_c") > execution_order.index("step_a")
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assert execution_order.index("step_d") > execution_order.index("step_b")
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def test_cyclic_flow():
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"""Test a cyclic flow that runs a finite number of iterations."""
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execution_order = []
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class CyclicFlow(Flow):
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iteration = 0
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max_iterations = 3
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@start("loop")
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def step_1(self):
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if self.iteration >= self.max_iterations:
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return # Do not proceed further
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execution_order.append(f"step_1_{self.iteration}")
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@listen(step_1)
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def step_2(self):
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execution_order.append(f"step_2_{self.iteration}")
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@router(step_2)
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def step_3(self):
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execution_order.append(f"step_3_{self.iteration}")
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self.iteration += 1
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if self.iteration < self.max_iterations:
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return "loop"
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return "exit"
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flow = CyclicFlow()
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flow.kickoff()
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expected_order = []
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for i in range(flow.max_iterations):
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expected_order.extend([f"step_1_{i}", f"step_2_{i}", f"step_3_{i}"])
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assert execution_order == expected_order
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def test_flow_with_and_condition():
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"""Test a flow where a step waits for multiple other steps to complete."""
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execution_order = []
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class AndConditionFlow(Flow):
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@start()
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def step_1(self):
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execution_order.append("step_1")
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@start()
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def step_2(self):
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execution_order.append("step_2")
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@listen(and_(step_1, step_2))
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def step_3(self):
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execution_order.append("step_3")
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flow = AndConditionFlow()
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flow.kickoff()
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assert "step_1" in execution_order
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assert "step_2" in execution_order
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assert execution_order[-1] == "step_3"
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assert execution_order.index("step_3") > execution_order.index("step_1")
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assert execution_order.index("step_3") > execution_order.index("step_2")
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def test_flow_with_or_condition():
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"""Test a flow where a step is triggered when any of multiple steps complete."""
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execution_order = []
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class OrConditionFlow(Flow):
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@start()
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def step_a(self):
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execution_order.append("step_a")
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@start()
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def step_b(self):
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execution_order.append("step_b")
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@listen(or_(step_a, step_b))
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def step_c(self):
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execution_order.append("step_c")
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flow = OrConditionFlow()
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flow.kickoff()
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assert "step_a" in execution_order or "step_b" in execution_order
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assert "step_c" in execution_order
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assert execution_order.index("step_c") > min(
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execution_order.index("step_a"), execution_order.index("step_b")
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)
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def test_flow_with_router():
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"""Test a flow that uses a router method to determine the next step."""
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execution_order = []
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class RouterFlow(Flow):
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@start()
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def start_method(self):
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execution_order.append("start_method")
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@router(start_method)
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def router(self):
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execution_order.append("router")
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# Ensure the condition is set to True to follow the "step_if_true" path
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condition = True
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return "step_if_true" if condition else "step_if_false"
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@listen("step_if_true")
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def truthy(self):
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execution_order.append("step_if_true")
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@listen("step_if_false")
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def falsy(self):
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execution_order.append("step_if_false")
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flow = RouterFlow()
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flow.kickoff()
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assert execution_order == ["start_method", "router", "step_if_true"]
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def test_async_flow():
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"""Test an asynchronous flow."""
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execution_order = []
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class AsyncFlow(Flow):
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@start()
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async def step_1(self):
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execution_order.append("step_1")
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await asyncio.sleep(0.1)
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@listen(step_1)
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async def step_2(self):
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execution_order.append("step_2")
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await asyncio.sleep(0.1)
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flow = AsyncFlow()
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asyncio.run(flow.kickoff_async())
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assert execution_order == ["step_1", "step_2"]
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def test_flow_with_exceptions():
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"""Test flow behavior when exceptions occur in steps."""
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execution_order = []
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class ExceptionFlow(Flow):
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@start()
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def step_1(self):
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execution_order.append("step_1")
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raise ValueError("An error occurred in step_1")
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@listen(step_1)
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def step_2(self):
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execution_order.append("step_2")
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flow = ExceptionFlow()
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with pytest.raises(ValueError):
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flow.kickoff()
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# Ensure step_2 did not execute
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assert execution_order == ["step_1"]
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def test_flow_restart():
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"""Test restarting a flow after it has completed."""
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execution_order = []
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class RestartableFlow(Flow):
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@start()
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def step_1(self):
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execution_order.append("step_1")
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@listen(step_1)
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def step_2(self):
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execution_order.append("step_2")
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flow = RestartableFlow()
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flow.kickoff()
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flow.kickoff() # Restart the flow
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assert execution_order == ["step_1", "step_2", "step_1", "step_2"]
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def test_flow_with_custom_state():
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"""Test a flow that maintains and modifies internal state."""
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class StateFlow(Flow):
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def __init__(self):
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super().__init__()
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self.counter = 0
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@start()
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def step_1(self):
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self.counter += 1
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@listen(step_1)
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def step_2(self):
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self.counter *= 2
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assert self.counter == 2
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flow = StateFlow()
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flow.kickoff()
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assert flow.counter == 2
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def test_flow_uuid_unstructured():
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"""Test that unstructured (dictionary) flow states automatically get a UUID that persists."""
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initial_id = None
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class UUIDUnstructuredFlow(Flow):
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@start()
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def first_method(self):
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nonlocal initial_id
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# Verify ID is automatically generated
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assert "id" in self.state
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assert isinstance(self.state["id"], str)
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# Store initial ID for comparison
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initial_id = self.state["id"]
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# Add some data to trigger state update
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self.state["data"] = "example"
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@listen(first_method)
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def second_method(self):
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# Ensure the ID persists after state updates
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assert "id" in self.state
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assert self.state["id"] == initial_id
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# Update state again to verify ID preservation
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self.state["more_data"] = "test"
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assert self.state["id"] == initial_id
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flow = UUIDUnstructuredFlow()
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flow.kickoff()
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# Verify ID persists after flow completion
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assert flow.state["id"] == initial_id
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# Verify UUID format (36 characters, including hyphens)
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assert len(flow.state["id"]) == 36
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def test_flow_uuid_structured():
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"""Test that structured (Pydantic) flow states automatically get a UUID that persists."""
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initial_id = None
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class MyStructuredState(BaseModel):
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counter: int = 0
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message: str = "initial"
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class UUIDStructuredFlow(Flow[MyStructuredState]):
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@start()
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def first_method(self):
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nonlocal initial_id
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# Verify ID is automatically generated and accessible as attribute
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assert hasattr(self.state, "id")
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assert isinstance(self.state.id, str)
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# Store initial ID for comparison
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initial_id = self.state.id
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# Update some fields to trigger state changes
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self.state.counter += 1
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self.state.message = "updated"
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@listen(first_method)
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def second_method(self):
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# Ensure the ID persists after state updates
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assert hasattr(self.state, "id")
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assert self.state.id == initial_id
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# Update state again to verify ID preservation
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self.state.counter += 1
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self.state.message = "final"
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assert self.state.id == initial_id
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flow = UUIDStructuredFlow()
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flow.kickoff()
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# Verify ID persists after flow completion
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assert flow.state.id == initial_id
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# Verify UUID format (36 characters, including hyphens)
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assert len(flow.state.id) == 36
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# Verify other state fields were properly updated
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assert flow.state.counter == 2
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assert flow.state.message == "final"
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def test_router_with_multiple_conditions():
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"""Test a router that triggers when any of multiple steps complete (OR condition),
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and another router that triggers only after all specified steps complete (AND condition).
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"""
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execution_order = []
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class ComplexRouterFlow(Flow):
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@start()
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def step_a(self):
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execution_order.append("step_a")
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@start()
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def step_b(self):
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execution_order.append("step_b")
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@router(or_("step_a", "step_b"))
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def router_or(self):
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execution_order.append("router_or")
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return "next_step_or"
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@listen("next_step_or")
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def handle_next_step_or_event(self):
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execution_order.append("handle_next_step_or_event")
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@listen(handle_next_step_or_event)
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def branch_2_step(self):
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execution_order.append("branch_2_step")
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@router(and_(handle_next_step_or_event, branch_2_step))
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def router_and(self):
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execution_order.append("router_and")
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return "final_step"
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@listen("final_step")
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def log_final_step(self):
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execution_order.append("log_final_step")
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flow = ComplexRouterFlow()
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flow.kickoff()
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assert "step_a" in execution_order
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assert "step_b" in execution_order
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assert "router_or" in execution_order
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assert "handle_next_step_or_event" in execution_order
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assert "branch_2_step" in execution_order
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assert "router_and" in execution_order
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assert "log_final_step" in execution_order
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# Check that the AND router triggered after both relevant steps:
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assert execution_order.index("router_and") > execution_order.index(
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"handle_next_step_or_event"
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)
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assert execution_order.index("router_and") > execution_order.index("branch_2_step")
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# final_step should run after router_and
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assert execution_order.index("log_final_step") > execution_order.index("router_and")
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def test_unstructured_flow_event_emission():
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"""Test that the correct events are emitted during unstructured flow
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execution with all fields validated."""
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class PoemFlow(Flow):
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@start()
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def prepare_flower(self):
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self.state["flower"] = "roses"
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return "foo"
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@start()
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def prepare_color(self):
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self.state["color"] = "red"
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return "bar"
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@listen(prepare_color)
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def write_first_sentence(self):
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return f"{self.state['flower']} are {self.state['color']}"
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@listen(write_first_sentence)
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def finish_poem(self, first_sentence):
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separator = self.state.get("separator", "\n")
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return separator.join([first_sentence, "violets are blue"])
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@listen(finish_poem)
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def save_poem_to_database(self):
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# A method without args/kwargs to ensure events are sent correctly
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return "roses are red\nviolets are blue"
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flow = PoemFlow()
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received_events = []
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@crewai_event_bus.on(FlowStartedEvent)
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def handle_flow_start(source, event):
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received_events.append(event)
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@crewai_event_bus.on(MethodExecutionStartedEvent)
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def handle_method_start(source, event):
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received_events.append(event)
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@crewai_event_bus.on(FlowFinishedEvent)
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def handle_flow_end(source, event):
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received_events.append(event)
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flow.kickoff(inputs={"separator": ", "})
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assert isinstance(received_events[0], FlowStartedEvent)
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assert received_events[0].flow_name == "PoemFlow"
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assert received_events[0].inputs == {"separator": ", "}
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assert isinstance(received_events[0].timestamp, datetime)
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# All subsequent events are MethodExecutionStartedEvent
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for event in received_events[1:-1]:
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assert isinstance(event, MethodExecutionStartedEvent)
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assert event.flow_name == "PoemFlow"
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assert isinstance(event.state, dict)
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assert isinstance(event.state["id"], str)
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assert event.state["separator"] == ", "
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assert received_events[1].method_name == "prepare_flower"
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assert received_events[1].params == {}
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assert "flower" not in received_events[1].state
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assert received_events[2].method_name == "prepare_color"
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assert received_events[2].params == {}
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print("received_events[2]", received_events[2])
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assert "flower" in received_events[2].state
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assert received_events[3].method_name == "write_first_sentence"
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assert received_events[3].params == {}
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assert received_events[3].state["flower"] == "roses"
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assert received_events[3].state["color"] == "red"
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assert received_events[4].method_name == "finish_poem"
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assert received_events[4].params == {"_0": "roses are red"}
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assert received_events[4].state["flower"] == "roses"
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assert received_events[4].state["color"] == "red"
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assert received_events[5].method_name == "save_poem_to_database"
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assert received_events[5].params == {}
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assert received_events[5].state["flower"] == "roses"
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assert received_events[5].state["color"] == "red"
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assert isinstance(received_events[6], FlowFinishedEvent)
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assert received_events[6].flow_name == "PoemFlow"
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assert received_events[6].result == "roses are red\nviolets are blue"
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assert isinstance(received_events[6].timestamp, datetime)
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def test_structured_flow_event_emission():
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"""Test that the correct events are emitted during structured flow
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execution with all fields validated."""
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class OnboardingState(BaseModel):
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name: str = ""
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sent: bool = False
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class OnboardingFlow(Flow[OnboardingState]):
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@start()
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def user_signs_up(self):
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self.state.sent = False
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@listen(user_signs_up)
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def send_welcome_message(self):
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self.state.sent = True
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return f"Welcome, {self.state.name}!"
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flow = OnboardingFlow()
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flow.kickoff(inputs={"name": "Anakin"})
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received_events = []
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@crewai_event_bus.on(FlowStartedEvent)
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def handle_flow_start(source, event):
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received_events.append(event)
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@crewai_event_bus.on(MethodExecutionStartedEvent)
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def handle_method_start(source, event):
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received_events.append(event)
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@crewai_event_bus.on(MethodExecutionFinishedEvent)
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def handle_method_end(source, event):
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received_events.append(event)
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@crewai_event_bus.on(FlowFinishedEvent)
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def handle_flow_end(source, event):
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received_events.append(event)
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flow.kickoff(inputs={"name": "Anakin"})
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assert isinstance(received_events[0], FlowStartedEvent)
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assert received_events[0].flow_name == "OnboardingFlow"
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assert received_events[0].inputs == {"name": "Anakin"}
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assert isinstance(received_events[0].timestamp, datetime)
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assert isinstance(received_events[1], MethodExecutionStartedEvent)
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assert received_events[1].method_name == "user_signs_up"
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assert isinstance(received_events[2], MethodExecutionFinishedEvent)
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assert received_events[2].method_name == "user_signs_up"
|
|
|
|
assert isinstance(received_events[3], MethodExecutionStartedEvent)
|
|
assert received_events[3].method_name == "send_welcome_message"
|
|
assert received_events[3].params == {}
|
|
assert getattr(received_events[3].state, "sent") is False
|
|
|
|
assert isinstance(received_events[4], MethodExecutionFinishedEvent)
|
|
assert received_events[4].method_name == "send_welcome_message"
|
|
assert getattr(received_events[4].state, "sent") is True
|
|
assert received_events[4].result == "Welcome, Anakin!"
|
|
|
|
assert isinstance(received_events[5], FlowFinishedEvent)
|
|
assert received_events[5].flow_name == "OnboardingFlow"
|
|
assert received_events[5].result == "Welcome, Anakin!"
|
|
assert isinstance(received_events[5].timestamp, datetime)
|
|
|
|
|
|
def test_stateless_flow_event_emission():
|
|
"""Test that the correct events are emitted stateless during flow execution
|
|
with all fields validated."""
|
|
|
|
class StatelessFlow(Flow):
|
|
@start()
|
|
def init(self):
|
|
pass
|
|
|
|
@listen(init)
|
|
def process(self):
|
|
return "Deeds will not be less valiant because they are unpraised."
|
|
|
|
event_log = []
|
|
|
|
def handle_event(_, event):
|
|
event_log.append(event)
|
|
|
|
flow = StatelessFlow()
|
|
received_events = []
|
|
|
|
@crewai_event_bus.on(FlowStartedEvent)
|
|
def handle_flow_start(source, event):
|
|
received_events.append(event)
|
|
|
|
@crewai_event_bus.on(MethodExecutionStartedEvent)
|
|
def handle_method_start(source, event):
|
|
received_events.append(event)
|
|
|
|
@crewai_event_bus.on(MethodExecutionFinishedEvent)
|
|
def handle_method_end(source, event):
|
|
received_events.append(event)
|
|
|
|
@crewai_event_bus.on(FlowFinishedEvent)
|
|
def handle_flow_end(source, event):
|
|
received_events.append(event)
|
|
|
|
flow.kickoff()
|
|
|
|
assert isinstance(received_events[0], FlowStartedEvent)
|
|
assert received_events[0].flow_name == "StatelessFlow"
|
|
assert received_events[0].inputs is None
|
|
assert isinstance(received_events[0].timestamp, datetime)
|
|
|
|
assert isinstance(received_events[1], MethodExecutionStartedEvent)
|
|
assert received_events[1].method_name == "init"
|
|
|
|
assert isinstance(received_events[2], MethodExecutionFinishedEvent)
|
|
assert received_events[2].method_name == "init"
|
|
|
|
assert isinstance(received_events[3], MethodExecutionStartedEvent)
|
|
assert received_events[3].method_name == "process"
|
|
|
|
assert isinstance(received_events[4], MethodExecutionFinishedEvent)
|
|
assert received_events[4].method_name == "process"
|
|
|
|
assert isinstance(received_events[5], FlowFinishedEvent)
|
|
assert received_events[5].flow_name == "StatelessFlow"
|
|
assert (
|
|
received_events[5].result
|
|
== "Deeds will not be less valiant because they are unpraised."
|
|
)
|
|
assert isinstance(received_events[5].timestamp, datetime)
|
|
|
|
|
|
def test_flow_plotting():
|
|
class StatelessFlow(Flow):
|
|
@start()
|
|
def init(self):
|
|
return "Initializing flow..."
|
|
|
|
@listen(init)
|
|
def process(self):
|
|
return "Deeds will not be less valiant because they are unpraised."
|
|
|
|
flow = StatelessFlow()
|
|
flow.kickoff()
|
|
received_events = []
|
|
|
|
@crewai_event_bus.on(FlowPlotEvent)
|
|
def handle_flow_plot(source, event):
|
|
received_events.append(event)
|
|
|
|
flow.plot("test_flow")
|
|
|
|
assert len(received_events) == 1
|
|
assert isinstance(received_events[0], FlowPlotEvent)
|
|
assert received_events[0].flow_name == "StatelessFlow"
|
|
assert isinstance(received_events[0].timestamp, datetime)
|
|
|
|
|
|
def test_multiple_routers_from_same_trigger():
|
|
"""Test that multiple routers triggered by the same method all activate their listeners."""
|
|
execution_order = []
|
|
|
|
class MultiRouterFlow(Flow):
|
|
def __init__(self):
|
|
super().__init__()
|
|
# Set diagnosed conditions to trigger all routers
|
|
self.state["diagnosed_conditions"] = "DHA" # Contains D, H, and A
|
|
|
|
@start()
|
|
def scan_medical(self):
|
|
execution_order.append("scan_medical")
|
|
return "scan_complete"
|
|
|
|
@router(scan_medical)
|
|
def diagnose_conditions(self):
|
|
execution_order.append("diagnose_conditions")
|
|
return "diagnosis_complete"
|
|
|
|
@router(diagnose_conditions)
|
|
def diabetes_router(self):
|
|
execution_order.append("diabetes_router")
|
|
if "D" in self.state["diagnosed_conditions"]:
|
|
return "diabetes"
|
|
return None
|
|
|
|
@listen("diabetes")
|
|
def diabetes_analysis(self):
|
|
execution_order.append("diabetes_analysis")
|
|
return "diabetes_analysis_complete"
|
|
|
|
@router(diagnose_conditions)
|
|
def hypertension_router(self):
|
|
execution_order.append("hypertension_router")
|
|
if "H" in self.state["diagnosed_conditions"]:
|
|
return "hypertension"
|
|
return None
|
|
|
|
@listen("hypertension")
|
|
def hypertension_analysis(self):
|
|
execution_order.append("hypertension_analysis")
|
|
return "hypertension_analysis_complete"
|
|
|
|
@router(diagnose_conditions)
|
|
def anemia_router(self):
|
|
execution_order.append("anemia_router")
|
|
if "A" in self.state["diagnosed_conditions"]:
|
|
return "anemia"
|
|
return None
|
|
|
|
@listen("anemia")
|
|
def anemia_analysis(self):
|
|
execution_order.append("anemia_analysis")
|
|
return "anemia_analysis_complete"
|
|
|
|
flow = MultiRouterFlow()
|
|
flow.kickoff()
|
|
|
|
# Verify all methods were called
|
|
assert "scan_medical" in execution_order
|
|
assert "diagnose_conditions" in execution_order
|
|
|
|
# Verify all routers were called
|
|
assert "diabetes_router" in execution_order
|
|
assert "hypertension_router" in execution_order
|
|
assert "anemia_router" in execution_order
|
|
|
|
# Verify all listeners were called - this is the key test for the fix
|
|
assert "diabetes_analysis" in execution_order
|
|
assert "hypertension_analysis" in execution_order
|
|
assert "anemia_analysis" in execution_order
|
|
|
|
# Verify execution order constraints
|
|
assert execution_order.index("diagnose_conditions") > execution_order.index(
|
|
"scan_medical"
|
|
)
|
|
|
|
# All routers should execute after diagnose_conditions
|
|
assert execution_order.index("diabetes_router") > execution_order.index(
|
|
"diagnose_conditions"
|
|
)
|
|
assert execution_order.index("hypertension_router") > execution_order.index(
|
|
"diagnose_conditions"
|
|
)
|
|
assert execution_order.index("anemia_router") > execution_order.index(
|
|
"diagnose_conditions"
|
|
)
|
|
|
|
# All analyses should execute after their respective routers
|
|
assert execution_order.index("diabetes_analysis") > execution_order.index(
|
|
"diabetes_router"
|
|
)
|
|
assert execution_order.index("hypertension_analysis") > execution_order.index(
|
|
"hypertension_router"
|
|
)
|
|
assert execution_order.index("anemia_analysis") > execution_order.index(
|
|
"anemia_router"
|
|
)
|