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Copy pathtest_rotating_loggers.py
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268 lines (203 loc) · 9.82 KB
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#!/usr/bin/env python
# coding: utf-8
"""
Test rotating loggers
"""
import os
from pathlib import Path
import tempfile
from unittest.mock import Mock
import pytest
import can
from .data.example_data import generate_message
class TestBaseRotatingLogger:
@staticmethod
def _get_instance(*args, **kwargs):
class SubClass(can.io.BaseRotatingLogger):
"""Subclass that implements abstract methods for testing."""
def should_rollover(self, msg):
...
def do_rollover(self):
...
return SubClass(*args, **kwargs)
def test_import(self):
assert hasattr(can.io, "BaseRotatingLogger")
def test_attributes(self):
assert issubclass(can.io.BaseRotatingLogger, can.Listener)
assert hasattr(can.io.BaseRotatingLogger, "supported_writers")
assert hasattr(can.io.BaseRotatingLogger, "namer")
assert hasattr(can.io.BaseRotatingLogger, "rotator")
assert hasattr(can.io.BaseRotatingLogger, "rollover_count")
assert hasattr(can.io.BaseRotatingLogger, "writer")
assert hasattr(can.io.BaseRotatingLogger, "rotation_filename")
assert hasattr(can.io.BaseRotatingLogger, "rotate")
assert hasattr(can.io.BaseRotatingLogger, "on_message_received")
assert hasattr(can.io.BaseRotatingLogger, "get_new_writer")
assert hasattr(can.io.BaseRotatingLogger, "stop")
assert hasattr(can.io.BaseRotatingLogger, "should_rollover")
assert hasattr(can.io.BaseRotatingLogger, "do_rollover")
def test_supported_writers(self):
supported_writers = can.io.BaseRotatingLogger.supported_writers
assert supported_writers[".asc"] == can.ASCWriter
assert supported_writers[".blf"] == can.BLFWriter
assert supported_writers[".csv"] == can.CSVWriter
assert supported_writers[".log"] == can.CanutilsLogWriter
assert supported_writers[".txt"] == can.Printer
def test_get_new_writer(self):
logger_instance = self._get_instance()
# access to non existing writer shall raise ValueError
with pytest.raises(ValueError):
_ = logger_instance.writer
with tempfile.TemporaryDirectory() as temp_dir:
logger_instance.get_new_writer(os.path.join(temp_dir, "file.ASC"))
assert isinstance(logger_instance.writer, can.ASCWriter)
logger_instance.stop()
logger_instance.get_new_writer(os.path.join(temp_dir, "file.BLF"))
assert isinstance(logger_instance.writer, can.BLFWriter)
logger_instance.stop()
logger_instance.get_new_writer(os.path.join(temp_dir, "file.CSV"))
assert isinstance(logger_instance.writer, can.CSVWriter)
logger_instance.stop()
logger_instance.get_new_writer(os.path.join(temp_dir, "file.LOG"))
assert isinstance(logger_instance.writer, can.CanutilsLogWriter)
logger_instance.stop()
logger_instance.get_new_writer(os.path.join(temp_dir, "file.TXT"))
assert isinstance(logger_instance.writer, can.Printer)
logger_instance.stop()
def test_rotation_filename(self):
logger_instance = self._get_instance()
default_name = "default"
assert logger_instance.rotation_filename(default_name) == "default"
logger_instance.namer = lambda x: x + "_by_namer"
assert logger_instance.rotation_filename(default_name) == "default_by_namer"
def test_rotate(self):
logger_instance = self._get_instance()
# test without rotator
with tempfile.TemporaryDirectory() as temp_dir:
source = os.path.join(temp_dir, "source.txt")
dest = os.path.join(temp_dir, "dest.txt")
assert os.path.exists(source) is False
assert os.path.exists(dest) is False
logger_instance.get_new_writer(source)
logger_instance.stop()
assert os.path.exists(source) is True
assert os.path.exists(dest) is False
logger_instance.rotate(source, dest)
assert os.path.exists(source) is False
assert os.path.exists(dest) is True
# test with rotator
rotator_func = Mock()
logger_instance.rotator = rotator_func
with tempfile.TemporaryDirectory() as temp_dir:
source = os.path.join(temp_dir, "source.txt")
dest = os.path.join(temp_dir, "dest.txt")
assert os.path.exists(source) is False
assert os.path.exists(dest) is False
logger_instance.get_new_writer(source)
logger_instance.stop()
assert os.path.exists(source) is True
assert os.path.exists(dest) is False
logger_instance.rotate(source, dest)
rotator_func.assert_called_with(source, dest)
# assert that no rotation was performed since rotator_func
# does not do anything
assert os.path.exists(source) is True
assert os.path.exists(dest) is False
def test_stop(self):
"""Test if stop() method of writer is called."""
logger_instance = self._get_instance()
with tempfile.TemporaryDirectory() as temp_dir:
logger_instance.get_new_writer(os.path.join(temp_dir, "file.ASC"))
# replace stop method of writer with Mock
org_stop = logger_instance.writer.stop
mock_stop = Mock()
logger_instance.writer.stop = mock_stop
logger_instance.stop()
mock_stop.assert_called()
# close file.ASC to enable cleanup of temp_dir
org_stop()
def test_on_message_received(self):
logger_instance = self._get_instance()
with tempfile.TemporaryDirectory() as temp_dir:
logger_instance.get_new_writer(os.path.join(temp_dir, "file.ASC"))
"""Test without rollover"""
should_rollover = Mock(return_value=False)
do_rollover = Mock()
writers_on_message_received = Mock()
logger_instance.should_rollover = should_rollover
logger_instance.do_rollover = do_rollover
logger_instance.writer.on_message_received = writers_on_message_received
msg = generate_message(0x123)
logger_instance.on_message_received(msg)
should_rollover.assert_called_with(msg)
do_rollover.assert_not_called()
writers_on_message_received.assert_called_with(msg)
"""Test with rollover"""
should_rollover = Mock(return_value=True)
do_rollover = Mock()
writers_on_message_received = Mock()
logger_instance.should_rollover = should_rollover
logger_instance.do_rollover = do_rollover
logger_instance.writer.on_message_received = writers_on_message_received
msg = generate_message(0x123)
logger_instance.on_message_received(msg)
should_rollover.assert_called_with(msg)
do_rollover.assert_called()
writers_on_message_received.assert_called_with(msg)
# stop writer to enable cleanup of temp_dir
logger_instance.stop()
class TestSizedRotatingLogger:
def test_import(self):
assert hasattr(can.io, "SizedRotatingLogger")
assert hasattr(can, "SizedRotatingLogger")
def test_attributes(self):
assert issubclass(can.SizedRotatingLogger, can.io.BaseRotatingLogger)
assert hasattr(can.SizedRotatingLogger, "supported_writers")
assert hasattr(can.SizedRotatingLogger, "namer")
assert hasattr(can.SizedRotatingLogger, "rotator")
assert hasattr(can.SizedRotatingLogger, "should_rollover")
assert hasattr(can.SizedRotatingLogger, "do_rollover")
def test_create_instance(self):
base_filename = "mylogfile.ASC"
max_bytes = 512
with tempfile.TemporaryDirectory() as temp_dir:
logger_instance = can.SizedRotatingLogger(
base_filename=os.path.join(temp_dir, base_filename), max_bytes=max_bytes
)
assert Path(logger_instance.base_filename).name == base_filename
assert logger_instance.max_bytes == max_bytes
assert logger_instance.rollover_count == 0
assert isinstance(logger_instance.writer, can.ASCWriter)
logger_instance.stop()
def test_should_rollover(self):
base_filename = "mylogfile.ASC"
max_bytes = 512
with tempfile.TemporaryDirectory() as temp_dir:
logger_instance = can.SizedRotatingLogger(
base_filename=os.path.join(temp_dir, base_filename), max_bytes=max_bytes
)
msg = generate_message(0x123)
do_rollover = Mock()
logger_instance.do_rollover = do_rollover
logger_instance.writer.file.tell = Mock(return_value=511)
assert logger_instance.should_rollover(msg) is False
logger_instance.on_message_received(msg)
do_rollover.assert_not_called()
logger_instance.writer.file.tell = Mock(return_value=512)
assert logger_instance.should_rollover(msg) is True
logger_instance.on_message_received(msg)
do_rollover.assert_called()
logger_instance.stop()
def test_logfile_size(self):
base_filename = "mylogfile.ASC"
max_bytes = 1024
msg = generate_message(0x123)
with tempfile.TemporaryDirectory() as temp_dir:
logger_instance = can.SizedRotatingLogger(
base_filename=os.path.join(temp_dir, base_filename), max_bytes=max_bytes
)
for _ in range(128):
logger_instance.on_message_received(msg)
for file_path in os.listdir(temp_dir):
assert os.path.getsize(os.path.join(temp_dir, file_path)) <= 1100
logger_instance.stop()
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