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from unittest.mock import MagicMock
import os
from io import StringIO
from UM.Preferences import Preferences
import pytest
from UM.Resources import Resources
Resources.addSearchPath(os.path.dirname(os.path.abspath(__file__)))
test_Preference_data = [
{"key": "test/zomg", "default": 10},
{"key": "test/BLORP", "default": "True"},
{"key": "testing/BLORP", "default": "False"},
{"key": "testing/omgzomg", "default": dict()}
]
test_newValues_data = [None, 10, "omgzomg", -20, 12.1, 2j, {"test", "more_test"}, [10, 20, 30], "True", "true", dict()]
# Preferences parses "True" to True and "False" to False
def parseValue(value):
if value == "True":
return True
elif value == "False":
return False
else:
return value
def test_readWrite():
preferences = Preferences()
path = Resources.getPath(Resources.Preferences, "preferences_test.cfg")
preferences.readFromFile(path)
# Check if it has been loaded correctly
assert preferences.getValue("general/foo") == "omgzomg"
assert preferences.getValue("general/derp") == True
# Write contents of the preference to a buffer
in_memory_storage = StringIO()
preferences.writeToFile(in_memory_storage) # type: ignore
new_preferences = Preferences()
# For some reason, if write was used, the read doesn't work. If we do it like this, it does work.
new_preferences.readFromFile(StringIO(in_memory_storage.getvalue()))
assert preferences.getValue("general/foo") == new_preferences.getValue("general/foo")
assert preferences.getValue("test/more_test") == new_preferences.getValue("test/more_test")
def test_deserialize():
preferences = Preferences()
path = Resources.getPath(Resources.Preferences, "preferences_test.cfg")
with open(path, "r", encoding="utf-8") as f:
preferences.deserialize(f.read())
assert preferences.getValue("general/foo") == "omgzomg"
assert preferences.getValue("general/derp") == True
def test_malformattedKey():
preferences = Preferences()
with pytest.raises(Exception):
preferences.addPreference("DERP", "DERP")
@pytest.mark.parametrize("preference", test_Preference_data)
def test_addPreference(preference):
preferences = Preferences()
preferences.addPreference(preference["key"], preference["default"])
assert preferences.getValue(preference["key"]) == parseValue(preference["default"])
# Attempt to add the preference again, but with a different default.
preferences.addPreference(preference["key"], preference["key"])
assert preferences.getValue(preference["key"]) == parseValue(preference["key"])
@pytest.mark.parametrize("preference", test_Preference_data)
def test_removePreference(preference):
preferences = Preferences()
preferences.addPreference(preference["key"], preference["default"])
preferences.removePreference(preference["key"])
assert preferences.getValue(preference["key"]) is None
@pytest.mark.parametrize("new_value", test_newValues_data)
def test_setResetValue(new_value):
preferences = Preferences()
default_value = "omgzomg"
preferences.preferenceChanged.emit = MagicMock()
preferences.addPreference("test/test", default_value)
assert preferences.preferenceChanged.emit.call_count == 0
preferences.setValue("test/test", new_value)
assert preferences.getValue("test/test") == parseValue(new_value)
if new_value != default_value:
assert preferences.preferenceChanged.emit.call_count == 1
preferences.resetPreference("test/test")
if new_value != default_value:
assert preferences.preferenceChanged.emit.call_count == 2
else:
# The preference never changed. Neither the set or the reset should trigger an emit.
assert preferences.preferenceChanged.emit.call_count == 0
assert preferences.getValue("test/test") == default_value
def test_nonExistingSetting():
preferences = Preferences()
# Test that attempting to modify a non existing setting in any way doesn't break things.
preferences.setDefault("nonExistingPreference", "whatever")
preferences.setValue("nonExistingPreference", "whatever")
preferences.removePreference("nonExistingPreference")
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