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sientia-dataops-opc-ingestor/tests/unit/engines/test_write.py
vitor-aignosi 97bf2fd748
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SIENTIAPDE-1973
SIENTIAPDE-1973: Refactor unit tests for improved readability, primarily by splitting chained assertions into individual statements and minor fixture import adjustments.
2026-10-29 13:33:25 -03:00

377 lines
11 KiB
Python

from datetime import datetime
from unittest.mock import AsyncMock, MagicMock, patch
import pytest
from asyncua import ua
import ingestor.metrics as metrics
from ingestor.engines.write import WriteEngine
SERVER_CFG = {
'server_id': 'srv1',
'url': 'opc.tcp://kepserver:49320',
'security': {'mode': 'SignAndEncrypt', 'policy': 'Basic256Sha256'},
'certificate': None,
}
def make_resolver(cfg=SERVER_CFG):
resolver = MagicMock()
resolver.resolve = AsyncMock(return_value=cfg)
return resolver
def make_engine(**kwargs):
kwargs.setdefault('servers', make_resolver())
eng = WriteEngine(
pool=AsyncMock(),
sink=AsyncMock(),
logger=MagicMock(),
notification_handler=MagicMock(),
metrics_controller=AsyncMock(),
**kwargs,
)
eng.emit_metric = AsyncMock()
return eng
def make_client(node=None):
node = node or make_node()
client = MagicMock()
client.get_node = MagicMock(return_value=node)
return client
def make_node():
node = MagicMock()
node.write_value = AsyncMock()
return node
def base_cmd(**overrides):
cmd = {
'server_id': 'srv1',
'addr': 'ns=2;i=5',
'value': 42.0,
'data_type': 'float',
'tag_type': 'prediction',
'model_id': 'm1',
'model_name': 'model-1',
'timestamp': '2026-07-13T12:00:00Z',
'schema': 'sientia_data',
'table_name': 'predictions_m1',
}
cmd.update(overrides)
return cmd
@pytest.mark.asyncio
async def test_write_success_writes_datavalue_and_returns_ok():
eng = make_engine()
node = make_node()
client = make_client(node)
eng.pool.get.return_value = client
result = await eng.write(base_cmd())
client.get_node.assert_called_once_with('ns=2;i=5')
node.write_value.assert_awaited_once()
dv = node.write_value.await_args.args[0]
assert isinstance(dv, ua.DataValue)
assert dv.Value.Value == 42.0
assert dv.Value.VariantType == ua.VariantType.Float
assert result.ok is True
assert result.status == 'ok'
assert result.opc_status_code == 'Good'
eng.sink.update_write_status.assert_awaited_once_with(base_cmd(), result)
@pytest.mark.asyncio
async def test_write_success_emits_metrics():
eng = make_engine()
eng.pool.get.return_value = make_client()
await eng.write(base_cmd())
eng.emit_metric.assert_any_await(
metric_object=metrics.OPC_WRITE_TOTAL,
tags={'pod_id': eng.pod_id, 'server_name': 'srv1', 'model_id': 'm1', 'result': 'success'},
)
status_call = next(
c
for c in eng.emit_metric.await_args_list
if c.kwargs['metric_object'] is metrics.OPC_WRITE_STATUS_BY_MODEL
)
assert status_call.kwargs['value'] == 1
assert status_call.kwargs['tags'] == {'pod_id': eng.pod_id, 'model_id': 'm1', 'status': 'ok'}
latency_call = next(
c
for c in eng.emit_metric.await_args_list
if c.kwargs['metric_object'] is metrics.OPC_WRITE_LATENCY
)
assert latency_call.kwargs['method'] == 'observe'
assert latency_call.kwargs['value'] >= 0
@pytest.mark.asyncio
async def test_write_defaults_carry_statuscode_and_timestamp():
eng = make_engine(write_timestamp=True, write_quality=True)
node = make_node()
eng.pool.get.return_value = make_client(node)
await eng.write(base_cmd())
dv = node.write_value.await_args.args[0]
assert dv.StatusCode is not None
assert dv.StatusCode.is_good()
assert dv.SourceTimestamp == datetime.fromisoformat('2026-07-13T12:00:00Z')
@pytest.mark.asyncio
async def test_write_engine_flags_off_omit_statuscode_and_timestamp():
eng = make_engine(write_timestamp=False, write_quality=False)
node = make_node()
eng.pool.get.return_value = make_client(node)
await eng.write(base_cmd())
dv = node.write_value.await_args.args[0]
assert dv.StatusCode is None
assert dv.SourceTimestamp is None
@pytest.mark.asyncio
async def test_per_message_flag_override_disables_timestamp():
# Engine default is True, but the command explicitly turns it off.
eng = make_engine(write_timestamp=True, write_quality=True)
node = make_node()
eng.pool.get.return_value = make_client(node)
await eng.write(base_cmd(write_timestamp=False))
dv = node.write_value.await_args.args[0]
assert dv.SourceTimestamp is None
assert dv.StatusCode is not None # write_quality untouched, stays on
@pytest.mark.asyncio
async def test_write_bad_type_returns_error_without_raising():
eng = make_engine()
result = await eng.write(base_cmd(value='abc', data_type='int'))
assert result.ok is False
assert result.status == 'error'
eng.sink.update_write_status.assert_awaited_once()
eng.pool.get.assert_not_awaited()
eng.emit_metric.assert_any_await(
metric_object=metrics.OPC_ERROR_BY_TYPE,
tags={'pod_id': eng.pod_id, 'server_name': 'srv1', 'error_type': 'conversion'},
)
eng.emit_metric.assert_any_await(
metric_object=metrics.OPC_WRITE_TOTAL,
tags={'pod_id': eng.pod_id, 'server_name': 'srv1', 'model_id': 'm1', 'result': 'error'},
)
@pytest.mark.asyncio
async def test_write_none_data_type_returns_error_without_raising():
eng = make_engine()
result = await eng.write(base_cmd(data_type=None))
assert result.ok is False
assert result.status == 'error'
eng.sink.update_write_status.assert_awaited_once()
eng.pool.get.assert_not_awaited()
@pytest.mark.asyncio
async def test_write_missing_value_key_returns_error_without_raising():
eng = make_engine()
cmd = base_cmd()
del cmd['value']
result = await eng.write(cmd)
assert result.ok is False
assert result.status == 'error'
eng.sink.update_write_status.assert_awaited_once()
eng.pool.get.assert_not_awaited()
@pytest.mark.asyncio
async def test_write_missing_data_type_key_returns_error_without_raising():
eng = make_engine()
cmd = base_cmd()
del cmd['data_type']
result = await eng.write(cmd)
assert result.ok is False
assert result.status == 'error'
eng.sink.update_write_status.assert_awaited_once()
eng.pool.get.assert_not_awaited()
@pytest.mark.asyncio
async def test_write_value_raises_maps_to_error_result_not_raised():
eng = make_engine()
node = make_node()
node.write_value.side_effect = RuntimeError('boom')
eng.pool.get.return_value = make_client(node)
result = await eng.write(base_cmd())
assert result.ok is False
assert result.status == 'error'
assert result.opc_status_code == 'RuntimeError'
eng.sink.update_write_status.assert_awaited_once()
eng.emit_metric.assert_any_await(
metric_object=metrics.OPC_ERROR_BY_TYPE,
tags={'pod_id': eng.pod_id, 'server_name': 'srv1', 'error_type': 'RuntimeError'},
)
@pytest.mark.asyncio
async def test_write_session_bad_status_code_error_maps_to_session_bad():
from asyncua.ua.uaerrors import BadSessionClosed
eng = make_engine()
node = make_node()
node.write_value.side_effect = BadSessionClosed('closed')
eng.pool.get.return_value = make_client(node)
result = await eng.write(base_cmd())
assert result.ok is False
assert result.status == 'session_bad'
@pytest.mark.asyncio
async def test_rate_limit_sleeps_between_back_to_back_writes():
eng = make_engine(min_pause_s=0.05)
eng.pool.get.return_value = make_client()
with patch('ingestor.engines.write.asyncio.sleep', new_callable=AsyncMock) as sleep_mock:
await eng.write(base_cmd())
sleep_mock.assert_not_awaited()
await eng.write(base_cmd())
sleep_mock.assert_awaited_once()
remaining = sleep_mock.await_args.args[0]
assert 0 < remaining <= 0.05
@pytest.mark.asyncio
async def test_no_rate_limit_when_min_pause_is_zero():
eng = make_engine(min_pause_s=0.0)
eng.pool.get.return_value = make_client()
with patch('ingestor.engines.write.asyncio.sleep', new_callable=AsyncMock) as sleep_mock:
await eng.write(base_cmd())
await eng.write(base_cmd())
sleep_mock.assert_not_awaited()
# --- SIENTIAPDE-1975: server resolution (GW1) and error reporting (GW4) ---
@pytest.mark.asyncio
async def test_write_uses_the_resolved_server_connection():
"""The C2 command of the Laborious carries only the server_id."""
eng = make_engine()
eng.pool.get.return_value = make_client()
await eng.write(base_cmd())
eng.servers.resolve.assert_awaited_once_with('srv1')
eng.pool.get.assert_awaited_once_with('srv1', SERVER_CFG)
@pytest.mark.asyncio
async def test_write_unknown_server_records_error_without_connecting():
eng = make_engine(servers=make_resolver(cfg=None))
result = await eng.write(base_cmd())
assert result.status == 'error'
assert result.opc_status_code == 'server_not_found'
eng.pool.get.assert_not_awaited()
eng.sink.update_write_status.assert_awaited_once_with(base_cmd(), result)
@pytest.mark.asyncio
async def test_write_server_lookup_failure_records_error():
resolver = make_resolver()
resolver.resolve.side_effect = RuntimeError('mongo down')
eng = make_engine(servers=resolver)
result = await eng.write(base_cmd())
assert result.status == 'error'
assert result.opc_status_code == 'server_lookup'
assert 'mongo down' in result.message
eng.pool.get.assert_not_awaited()
@pytest.mark.asyncio
async def test_write_ignores_a_connection_carried_by_the_command():
"""The server is always resolved by server_id (SIENTIAPDE-1974): connection fields
in the command are not an override"""
eng = make_engine()
eng.pool.get.return_value = make_client()
await eng.write(base_cmd(url='opc.tcp://h:4840'))
eng.pool.get.assert_awaited_once_with('srv1', SERVER_CFG)
@pytest.mark.asyncio
async def test_write_without_resolver_is_server_not_found():
eng = make_engine(servers=None)
result = await eng.write(base_cmd(url='opc.tcp://h:4840'))
assert result.opc_status_code == 'server_not_found'
eng.pool.get.assert_not_awaited()
@pytest.mark.asyncio
async def test_write_error_logs_the_reason_and_sets_the_model_status():
eng = make_engine()
node = make_node()
node.write_value.side_effect = RuntimeError('BadWriteNotSupported')
eng.pool.get.return_value = make_client(node)
await eng.write(base_cmd())
logged = eng.logger.error.call_args.args[0]
assert 'RuntimeError' in logged
assert 'BadWriteNotSupported' in logged
assert 'addr=ns=2;i=5' in logged
assert 'model_id=m1' in logged
status_call = next(
c
for c in eng.emit_metric.await_args_list
if c.kwargs['metric_object'] is metrics.OPC_WRITE_STATUS_BY_MODEL
)
# Same series as a success, so it shows the last outcome.
assert status_call.kwargs['value'] == 0
assert status_call.kwargs['tags'] == {'pod_id': eng.pod_id, 'model_id': 'm1', 'status': 'ok'}
@pytest.mark.asyncio
@pytest.mark.parametrize('timestamp', [None, 'not-a-timestamp'])
async def test_write_bad_timestamp_records_error_without_raising(timestamp):
eng = make_engine(write_timestamp=True)
cmd = base_cmd(timestamp=timestamp)
if timestamp is None:
del cmd['timestamp']
result = await eng.write(cmd)
assert result.status == 'error'
assert result.opc_status_code == 'bad_timestamp'
eng.pool.get.assert_not_awaited()
eng.sink.update_write_status.assert_awaited_once()