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#!/usr/bin/env python
import shutil
import tempfile
import unittest
import unittest.mock
from tempfile import NamedTemporaryFile
import can
class LoadConfigTest(unittest.TestCase):
configuration_in = {
"default": {"interface": "serial", "channel": "0"},
"one": {"interface": "kvaser", "channel": "1", "bitrate": 100000},
"two": {"channel": "2"},
}
configuration_out = {
"default": {"interface": "serial", "channel": 0},
"one": {"interface": "kvaser", "channel": 1, "bitrate": 100000},
"two": {"channel": 2},
}
def setUp(self):
# Create a temporary directory
self.test_dir = tempfile.mkdtemp()
def tearDown(self):
# Remove the directory after the test
shutil.rmtree(self.test_dir)
def _gen_configration_file(self, sections):
with NamedTemporaryFile(
mode="w", dir=self.test_dir, delete=False
) as tmp_config_file:
content = []
for section in sections:
content.append(f"[{section}]")
for k, v in self.configuration_in[section].items():
content.append(f"{k} = {v}")
tmp_config_file.write("\n".join(content))
return tmp_config_file.name
def _dict_to_env(self, d):
return {f"CAN_{k.upper()}": str(v) for k, v in d.items()}
def test_config_default(self):
tmp_config = self._gen_configration_file(["default"])
config = can.util.load_config(path=tmp_config)
self.assertEqual(config, self.configuration_out["default"])
def test_config_whole_default(self):
tmp_config = self._gen_configration_file(self.configuration_in)
config = can.util.load_config(path=tmp_config)
self.assertEqual(config, self.configuration_out["default"])
def test_config_whole_context(self):
tmp_config = self._gen_configration_file(self.configuration_in)
config = can.util.load_config(path=tmp_config, context="one")
self.assertEqual(config, self.configuration_out["one"])
def test_config_merge_context(self):
tmp_config = self._gen_configration_file(self.configuration_in)
config = can.util.load_config(path=tmp_config, context="two")
expected = self.configuration_out["default"].copy()
expected.update(self.configuration_out["two"])
self.assertEqual(config, expected)
def test_config_merge_environment_to_context(self):
tmp_config = self._gen_configration_file(self.configuration_in)
env_data = {"interface": "serial", "bitrate": 125000}
env_dict = self._dict_to_env(env_data)
with unittest.mock.patch.dict("os.environ", env_dict):
config = can.util.load_config(path=tmp_config, context="one")
expected = self.configuration_out["one"].copy()
expected.update(env_data)
self.assertEqual(config, expected)
def test_config_whole_environment(self):
tmp_config = self._gen_configration_file(self.configuration_in)
env_data = {"interface": "socketcan", "channel": "3", "bitrate": 250000}
env_dict = self._dict_to_env(env_data)
with unittest.mock.patch.dict("os.environ", env_dict):
config = can.util.load_config(path=tmp_config, context="one")
expected = self.configuration_out["one"].copy()
expected.update({"interface": "socketcan", "channel": 3, "bitrate": 250000})
self.assertEqual(config, expected)
if __name__ == "__main__":
unittest.main()
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