Stanislav Hejny
206 lines
8.9 KiB
Python
206 lines
8.9 KiB
Python
import asyncio
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import time
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import unittest
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from unittest.mock import AsyncMock, MagicMock, patch
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from amqp.adapter.backpressure_handler import (
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BackpressureHandler,
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ScaleRequestV1,
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ScalingRequestAlert,
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)
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class TestBackpressureHandler(unittest.IsolatedAsyncioTestCase):
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def setUp(self):
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self.channel = AsyncMock()
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self.loop = asyncio.get_event_loop()
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self.config = MagicMock()
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self.config.amq_adapter.swarm_service_id = "test-service"
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self.config.amq_adapter.swarm_task_id = "test-task"
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self.config.backpressure.threshold_load = 100
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self.config.backpressure.time_window = 1
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self.config.backpressure.idle_duration = 2
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self.config.backpressure.cpu_monitoring_enabled = False
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self.config.backpressure.cpu_overload_duration = 1
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# Record callbacks for testing
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BackpressureHandler._callback_list = {}
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self.handler = BackpressureHandler(self.channel, self.loop, self.config)
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self.handler.exchange = AsyncMock()
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# Set do_loop to 1 to run the loop only once
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self.handler.do_loop = 1
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async def test_increase_decrease_current_load(self):
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self.handler.current_load = 0
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self.handler.increase_current_load()
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self.assertEqual(self.handler.current_load, 1)
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self.handler.decrease_current_load()
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self.assertEqual(self.handler.current_load, 0)
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async def test_update_current_load(self):
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self.handler.current_availability = 0
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self.handler.update_current_availability(5)
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self.assertEqual(self.handler.current_availability, 5)
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async def test_update_last_data_message_time(self):
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old_time = self.handler.last_backpressure_event_time
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self.handler.update_last_backpressure_event_time()
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self.assertGreater(self.handler.last_backpressure_event_time, old_time)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_update_backpressure_value(self, mock_publish):
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# Test updating with a higher maximum
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await self.handler.update_backpressure_value(50, 200)
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self.assertEqual(self.handler.current_availability, 50)
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self.assertEqual(self.handler.max_availability, 200)
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# Test updating with a lower maximum (should not change)
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await self.handler.update_backpressure_value(60, 50)
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self.assertEqual(self.handler.current_availability, 60)
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self.assertEqual(self.handler.max_availability, 200)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_check_overload_condition_normal(self, mock_publish):
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# Set up a normal state (60% available capacity)
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self.handler.max_availability = 100
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self.handler.current_availability = 60
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self.handler.last_backpressure_event = ScalingRequestAlert.UPDATE
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self.handler.last_backpressure_event_time = time.time() - 2 # 2 seconds ago
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await self.handler.check_overload_condition()
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# Should send an UPDATE event
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.requestType, ScalingRequestAlert.UPDATE)
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self.assertEqual(args.current_availability, 60)
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self.assertEqual(args.max_availability, 100)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_check_overload_condition_overload(self, mock_publish):
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# Set up an overload state (10% available capacity)
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self.handler.max_availability = 100
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self.handler.current_availability = 10
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self.handler.last_backpressure_event = ScalingRequestAlert.UPDATE
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self.handler.last_backpressure_event_time = time.time() - 2 # 2 seconds ago
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await self.handler.check_overload_condition()
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# Should send an OVERLOAD event
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.requestType, ScalingRequestAlert.OVERLOAD)
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self.assertEqual(args.current_availability, 10)
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self.assertEqual(args.max_availability, 100)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_check_overload_condition_idle(self, mock_publish):
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# Set up an idle state (90% available capacity)
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self.handler.max_availability = 100
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self.handler.current_availability = 90
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self.handler.last_backpressure_event = ScalingRequestAlert.IDLE
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# emulate fact that IDLE state is for 3 seconds longer than required minimum for sending IDLE event
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self.handler.last_backpressure_event_time = (
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time.time() - self.config.backpressure.idle_duration - 3
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)
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await self.handler.check_overload_condition()
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# Should send an IDLE event
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.requestType, ScalingRequestAlert.IDLE)
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self.assertEqual(args.current_availability, 90)
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self.assertEqual(args.max_availability, 100)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_check_overload_condition_auto_max(self, mock_publish):
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# Test with unset maximum that should be auto-detected
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self.handler.max_availability = -1
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self.handler.current_availability = 50
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self.handler.last_backpressure_event = ScalingRequestAlert.UPDATE
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self.handler.last_backpressure_event_time = (
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time.time() - self.config.backpressure.time_window - 2
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)
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await self.handler.check_overload_condition()
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# Should set maximum to current_availability and send UPDATE
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# self.assertEqual(self.handler.max_availability, 50)
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.requestType, ScalingRequestAlert.UPDATE)
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self.assertEqual(args.current_availability, 50)
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self.assertEqual(args.max_availability, -1)
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# Test with a higher value that should update the maximum
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mock_publish.reset_mock()
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await self.handler.update_backpressure_value(80, 80)
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# Should update maximum to 80
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self.assertEqual(self.handler.max_availability, 80)
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.current_availability, 80)
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self.assertEqual(args.max_availability, 80)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_handle_backpressure_overload_event(self, mock_publish):
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self.handler.max_availability = 100
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self.handler.current_availability = 10
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await self.handler.handle_backpressure_overload_event()
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.requestType, ScalingRequestAlert.OVERLOAD)
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self.assertEqual(args.current_availability, 10)
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self.assertEqual(args.max_availability, 100)
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@patch("amqp.adapter.backpressure_handler.BackpressureHandler.publish_backpressure_request")
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async def test_handle_backpressure_idle_event(self, mock_publish):
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self.handler.max_availability = 100
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self.handler.current_availability = 90
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await self.handler._handle_backpressure_idle_event()
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mock_publish.assert_called_once()
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args = mock_publish.call_args[0][0]
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self.assertEqual(args.requestType, ScalingRequestAlert.IDLE)
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self.assertEqual(args.current_availability, 90)
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self.assertEqual(args.max_availability, 100)
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@patch("asyncio.run_coroutine_threadsafe")
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async def test_publish_backpressure_request(self, mock_run):
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scaling_request = ScaleRequestV1(
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"test-service", "test-task", 100, 50, ScalingRequestAlert.UPDATE
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)
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await self.handler.publish_backpressure_request(scaling_request)
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# Check that run_coroutine_threadsafe was called
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self.assertEqual(mock_run.call_count, 1)
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# Check that the callback was recorded
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self.assertIn("_wrap_rabbit_mq_api", BackpressureHandler._callback_list)
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class TestScaleRequestV1(unittest.TestCase):
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def test_to_json(self):
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request = ScaleRequestV1("test-service", "test-task", 100, 50, ScalingRequestAlert.UPDATE)
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json_str = request.to_json()
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# Check that the JSON contains the expected fields
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self.assertIn('"version": 1', json_str)
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self.assertIn('"serviceId": "test-service"', json_str)
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self.assertIn('"taskId": "test-task"', json_str)
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self.assertIn('"maxAvailability": 100', json_str)
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self.assertIn('"currentAvailability": 50', json_str)
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self.assertIn(f'"requestType": "{ScalingRequestAlert.UPDATE.value}"', json_str)
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if __name__ == "__main__":
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unittest.main()
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