from copy import copy, deepcopy
import pytest
from returns.context import Context, RequiresContext
from returns.primitives.exceptions import ImmutableStateError
from returns.primitives.interfaces import Bindable, Instanceable, Mappable
@pytest.mark.parametrize('container', [
RequiresContext(lambda deps: deps),
RequiresContext.from_value(1),
Context.ask(),
])
@pytest.mark.parametrize('protocol', [
Bindable,
Mappable,
Instanceable,
])
def test_protocols(container, protocol):
"""Ensures that RequiresContext has all the right protocols."""
assert isinstance(container, protocol)
def test_context_immutable():
"""Ensures that Context is immutable."""
with pytest.raises(ImmutableStateError):
Context().abc = 1
def test_context_immutable_copy():
def test_equality():
"""Ensures that containers can be compared."""
assert RequiresContext(_same_function) == RequiresContext(_same_function)
assert Context[int].ask() == Context[int].ask()
assert Context[int].ask() == Context.ask()
assert Context.ask() == Context.ask()