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from typing import Generic, Optional, TypeVar, Union
from django.test.utils import TestContextDecorator
from waffle import (
get_waffle_flag_model,
get_waffle_sample_model,
get_waffle_switch_model,
)
__all__ = ['override_flag', 'override_sample', 'override_switch']
_T = TypeVar("_T")
class _overrider(TestContextDecorator, Generic[_T]):
def __init__(self, name: str, active: _T):
super().__init__()
self.name = name
self.active = active
def get(self) -> None:
self.obj, self.created = self.cls.objects.get_or_create(name=self.name)
def update(self, active: _T) -> None:
raise NotImplementedError
def get_value(self) -> _T:
raise NotImplementedError
def enable(self) -> None:
self.get()
self.old_value = self.get_value()
if self.old_value != self.active:
self.update(self.active)
def disable(self) -> None:
if self.created:
self.obj.delete()
self.obj.flush()
else:
self.update(self.old_value)
class override_switch(_overrider[bool]):
"""
override_switch is a contextmanager for easier testing of switches.
It accepts two parameters, name of the switch and it's state. Example
usage::
with override_switch('happy_mode', active=True):
...
If `Switch` already existed, it's value would be changed inside the context
block, then restored to the original value. If `Switch` did not exist
before entering the context, it is created, then removed at the end of the
block.
It can also act as a decorator::
@override_switch('happy_mode', active=True)
def test_happy_mode_enabled():
...
"""
cls = get_waffle_switch_model()
def update(self, active: bool) -> None:
obj = self.cls.objects.get(pk=self.obj.pk)
obj.active = active
obj.save()
obj.flush()
def get_value(self) -> bool:
return self.obj.active
class override_flag(_overrider[Optional[bool]]):
cls = get_waffle_flag_model()
def update(self, active: Optional[bool]) -> None:
obj = self.cls.objects.get(pk=self.obj.pk)
obj.everyone = active
obj.save()
obj.flush()
def get_value(self) -> Optional[bool]:
return self.obj.everyone
class override_sample(_overrider[Union[bool, float]]):
cls = get_waffle_sample_model()
def get(self) -> None:
try:
self.obj = self.cls.objects.get(name=self.name)
self.created = False
except self.cls.DoesNotExist:
self.obj = self.cls.objects.create(name=self.name, percent='0.0')
self.created = True
def update(self, active: Union[bool, float]) -> None:
if active is True:
p = 100.0
elif active is False:
p = 0.0
else:
p = active
obj = self.cls.objects.get(pk=self.obj.pk)
obj.percent = f'{p}'
obj.save()
obj.flush()
def get_value(self) -> Union[bool, float]:
p = self.obj.percent
if p == 100.0:
return True
if p == 0.0:
return False
return p
|
